Charge up climbs and accelerate out of turns with electric ease on the Co-op Cycles DRT e3.1 bike. Its motor—Bosch Performance Line CX, the smart system—makes even the most demanding riders smile.
Key Details
E-Bike Classification
Class 1: pedal assist up to 20 mph
Motor
Bosch Performance Line CX, the smart system
Battery Capacity (Wh)
625 watt hours
Weight
55 pounds
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Features
Bosch Performance Line CX, the smart system, is a Class 1 mid-drive motor with assist reaching up to 20 mph; motor is paired with a PowerTube 625 battery and LED remote
The LED remote connects your e-bike to the eBike Flow mobile app and even operates the Ride screen on your smartphone while your hands stay safely on the handlebar
Use the remote to change riding modes, use the smart Walk Assist or perform updates to your e-bike
RockShox Recon Silver RL fork (140 mm travel) and Deluxe Select Plus RT shock (130 mm travel) deliver a balanced and trail-ready ride
Tektro 4-piston hydraulic disc brakes provide precision stopping power with minimal hand force
SRAM SX Eagle 12-speed drivetrain offers a capable and versatile range for a variety of trails
Tubeless-ready tires and rims optimize tire pressure for best performance while also minimizing flats
Max weight limit including rider and cargo: 300 lbs.
Complies with UL 2849 – Intertek Testing Services NA Inc.
NOTE: Specs and images are subject to change based on component availability
Imported.
This e-bike comes with Coast to Coast Support, which includes:
1 year of free adjustments (see more below)
In-store bike assembly
Pickup in store or curbside
Bike experts available at 170+ bike shops
REI Co-op Members get more:
An additional year of free adjustments on e-bikes
20% off shop services
Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
More about our free adjustments: New bikes go through a normal break-in period, after which they should be readjusted. All electric bicycles sold at REI include free adjustments for the defined period (one year after purchase date for non-members, or two years for REI Co-op Members)—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation, chain lubrication and e-bike firmware updates. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
Measurements are stated in inches millimeters otherwise indicated.
How we measure bikes
bike diagram loading
Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
Buying Advice
How to Choose Mountain Bikes
What trails do you want to ride most?
Trail bikes are best for most riders who want to do a bit of everything
All-mountain bikes are best for trail riding and riding all over the mountain
Cross-country bikes are best for smoother trails with fewer technical challenges
Fat-tire bikes excel on snow or sand or rough surfaces
Hard-tail or full-suspension?
Hardtail bikes have only a front suspension fork and are less expensive. They're great for beginners or those who ride smoother trails.
Full-suspension bikes have a suspension fork up front and a rear shock; they provide more control ad comfort over rough terrain.
What wheel size is best for me? The number refers to diameter of the wheel. Generally, 27.5 in. wheels have faster acceleration while 29ers are more efficient on longer rides and roll over objects more easily.
Which frame material? Pick carbon if you want the lightest frame and don't mind paying a premium. Aluminum frames are more affordable and some can be relatively lightweight.
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
Reviews
(18)18 reviews with an average rating of 4.7 out of 5 stars
14 out of 16 (88%) reviewers recommend this product
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Average Customer Ratings
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Woody
Received free product
Denver
Rated 5.0 out of 5 stars
Very Capable E-Mountain Bike
1 year ago
I was very excited to test out the new Co-Op Cycles DRT e3.1 Electric Mountain Bike to see how it would perform as a mountain bike and as an e-bike. The first thing I noticed when picking up the bike was the obvious downside of any e-bike; its weight. E-bikes are usually at least twice as heavy as a regular bike and this bike comes in at 55 pounds with everything on it. Removing the battery seems to remove about 8 pounds. The first thing you are going to be asking is how to get the bike home from the store. The one option with no weight limit is going to be to ride it home but this is not always practical. The most common option is going to be a bike rack. This is something important to consider with your rack because many have a weight limit around 50 pounds, which puts this bike perilously close to a problem. I had a heavy duty rack with a 75 pound limit so this was not an issue. At 55 pounds I can lift this bike fairly comfortably onto the rack but obviously the ease of this will depend on your own body. Many people, but not all obviously, ride e-bikes because of physical limitations that the motor assists with. So if you know you won’t be able to lift a 55 pound bike onto a rack, you will want to consider a ramp. The other option would be to carry the bike either in a large SUV or truck bed, but here again the weight will make getting it up into the bed, or negotiating the tight confines of the back of an SUV a bit of an issue. This is not a dealbreaker, but definitely something to consider when buying.
I was also very curious to see how a bike with this weight would handle on the trail of course. I will say here that the bike exceeded my expectations but it is obviously limited somewhat by its weight. My expectations were that this bike would be a clunker bashing about into rocks and landing like a ton of bricks off of ledges and jumps. I was completely wrong. While it was by no means pillow soft in the front or rear suspension the 140mm front and 130mm rear travel did a good job of cushioning this bike’s 55 pounds and mine when going down obstacles. While I certainly noticed the bike's weight and some ledges hit a bit harder than a lighter bike might have, I was never uncomfortable on any ride. After a few hours of riding it almost set a new baseline expectation and I was no longer even noticing it.
The weight of the bike going uphill is a different story. I found a slight bit more difficulty in going up obstacles that I at first did not think of as particularly challenging. What I found was that to get the extra weight up over some ledges and rocks that I encountered I needed a lot more speed and the pedal assist on. On my undulating trails I found that I often needed to keep the pedal assist on in anticipation of climbing an upcoming obstacle, or else I had to frantically turn it on. On downhill trails I rarely had to use it. Where the pedal assist shines is on non technical uphill climbs. I bike with a few friends who have ironman level fitness. I do not. The Front Range is full of long steep climbs that lead to highly rewarding, but brief downhill fun. Normally I am struggling on thousand foot plus climbs to keep up with my fellow riders but this bike basically allowed me to cheat and keep up with them no problem. I found some particularly steep gradients of over 15% to really test out the Bosch motor. The motor is capable but not overpowering on these steep climbs. In other words you are not just sitting back and relaxing, your legs are still pumping and burning, just way less than they would on a non motorized bike.
Although the bike is relatively heavy I did find it much more nimble than I expected for such a bike. I found cornering pretty smooth and even on some very tight switchbacks only once had to put a foot down when I couldn’t make the tight turn. Going up the pedal assist made tight cornering even easier since I had more torque in the turns than just my own foot power. I never noticed any issue with sliding in between rocks and found the bike very nimble for its size. The only issue I noticed was a significant amount of pedal strikes on tighter turns and a couple obstacles. I could never really figure out if this was just due to the size of the bike making me take more aggressive turns than I realized or if the pedals were lower but I did have to start paying attention to that more than I was used to.
This is a Class 1 e-bike which means it only gives out power when you are pedaling. It has no throttle. This is relevant for what I found the other great cheat code part of the bike to be useful for. I live within a few miles of the mountains. Normally I absolutely despise riding a mountain bike on the road because the giant tires and seating position make even 4-5 miles super annoying to ride to and from my house. So I usually am lazy and load the bike into the rack and drive. With the e-bike however, the motor allows me an easy cheat on the road to get to and from the mountains. The top speed of 20 mph is more than enough to cruise along and I noticed I was even keeping up with a host of road bikers one day.
Class 1 also means that this bike can be taken on more trails than a Class 2. Although it is very important to verify this as I did not do before a trip to Moab where essentially all e-bikes are banned except on motorized roads. So essentially I hauled the bike out there for no real reason except to race my friends 4x4 truck up a rock wall. (I won by the way) This is one of the other downsides of an e-bike, you can’t just assume they are allowed. You have to check before you.
Aside from weight which I have addressed ad-nauseum, there are a few other aspects of the bike to consider. It has hydraulic disk brakes, which is essential for a bike of this size. (Oops I addressed weight again). I found no issue with these brakes. When fully applied going downhill at speed the bike stopped quite promptly. The 12 speed drivetrain had some clunky noises and pressure when shifting occasionally but it did what it needed to do. It came with tubeless tires, which is great for avoiding flats. I was never able to kill the battery on any day of riding. You would probably be able to if you put it on full blast for 20 plus miles but I never got close in my use case. It seemed to charge fairly quickly, taking only a couple hours. The charger is also relatively small and lightweight. Easy to carry in a backpack or haul along in your car.
Now while I thought the bike was mostly excellent there are a few bad things to note about it. Mostly this is related to the handlebars’ design. The only one not related to handlebar design is putting the battery back in. The bike is pretty heavy and it obviously doesn’t have a kickstand. (It does have reflectors which some purists might hate but I did not even really notice.) So you have to rest it up against something when putting the battery back in. The battery fit takes a bit of force to get back in which means the bike has to be sturdily set against something or else you might do like I did and knock the bike over on top of you while trying to put the battery back in. Not fun. Easily solved with a second person to hold it or just some attention to what it is leaning on.
Now onto the handlebars. The only part of the bike I really did not like. This has mostly to do with the location of various aspects of it. The gear shifters are in an awkward position. I am used to easily using my index finger and thumb to shift up and down respectively. However the design on this seems to be towards only using your thumb. The problem with this is that you have to reach forward with your thumb to reach the other shifter. This can be a problem when you are biking up and over obstacles, because you have to move your hand on the handlebars to adjust your thumb. The other problem is the seat dropper level is too far away. I found myself having to completely take my hand off to move it down the handle bars to get my thumb on the level to drop or raise my seat. These are not huge issues when riding on flat ground, but if you have to adjust while riding it leads to instability. The brake position as well is awkward. I usually use only an index finger on the brake handles at the far end of the handle to use leverage to depress the brake hard. However on this bike I found my hand very close to the center and unable to depress significant pressure on the lever without adjusting my hands. Again not a pleasant experience when moving fast through obstacles. I would not say this is a deal breaker though on the bike.
Overall I would say I was hugely impressed by the abilities of this bike. It was very capable and nimble for its size, even if the size does require some compromises. The only real negatives were related to the handle bars, which assuming it's not just my problem, hopefully can be adjusted on future models.
Age:35–44
Weight:250–275 lbs.
Inseam:36"
Height:6'4"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product
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Seabelle
Received free product
Denver, CO
Rated 5.0 out of 5 stars
Designed to handle almost everything!
1 year ago
The new REI DRT e3.1 mountain bike is an extremely capable bike for entry-level to advanced bikers. I stand 5'11" and 205 lbs, the large fits perfect. I did have to use a suspension pump to dial in the front and rear suspension to my liking. Very easy to do even if you have never done this before. I then strapped on a water bottle cage, rear mud flap, and hit the trails at Bear Creek Lake Park near Morrison, CO.
I really appreciate the pedal assist when travelling from my house to the trails when biking on the road. You can cover so much distance in a very short time. Much easier than loading the bike on the car/truck and driving to the trailhead. HUGE benefit right there of an eBike.
Once on the trails, the bike handles very well on gravel, through mud, and singletrack. I did find myself riding my brakes more going downhill on switchbacks, due to the bike weight and loose terrain I was worried of dumping to the side. A simple fix by letting air out of the tires and I was back in my comfort zone. The bike laughs in the face of hills and rocks 6-8" in diameter. It just cruises to the top! No more pausing and unclipping your shoes to catch yourself from falling over.
Switching the assist from high to low is very simple. I didn't set up the BOSCH "Flow" app yet, but reading about it makes me think I need to before my next ride.
Overall, this bike is pure joy. I have ridden single speed rigid steel bikes, full carbon fat bikes, and this bike is the most fun. I didn't think an eBike was for me because I use biking as my main form of exercise. So an eBike seemed to me like a lesser workout, but after riding this bike I think it's a greater workout. I was able to keep my heart rate in zones 1-3 for a solid 2 hour ride!
Thanks for reading, and thanks REI for making an amazing bike!
Age:35–44
Weight:200–225 lbs.
Height:5'11"
Experience Level:Experienced
Riding Frequency:Once per week
Yes , I recommend this product
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GetOutside
Received free product
Denver, CO
Rated 5.0 out of 5 stars
Ride longer, farther, and faster.
1 year ago
I've had the privilege of testing the Co-Op Cycles DRT e3.1 Electric Mountain Bike over the past few weeks, and I've been thoroughly impressed with its performance and the ebike overall.
The ebike’s controls are intuitive and REI makes the setup a breeze. Within minutes of riding I felt totally comfortable. The customer service at REI was excellent; the bike technician patiently addressed all my questions and fine-tuned the bike's fit to my height and weight.
It's important to grasp the distinction of a Class 1 ebike, where the electric motor engages solely during pedaling, thereby reducing the effort required to propel the bike forward. This is unlike Class 2 ebikes, which have a throttle for non-pedal propulsion. The DRT e3.1 has 4 modes for varying degrees of pedal assist.
One of the most pleasant surprises was the level of customization available to the DRT e3.1 via the Flow app. I highly recommend taking the time to explore and configure the settings, particularly the Assistance and Dynamic parameters, which allow for fine-tuning of pedal response and acceleration behavior across the four riding modes. Adjusting these settings allows you to tune how much and how quickly the bike responds to when you start pedaling (increase for more “pep” and decrease if it feels like the bike wants to launch when you start pedaling). This can also help you optimize the battery life beyond just riding in Eco mode. The app's range estimate feature helps alleviate any range anxiety.
The Bluetooth electronic key functionality adds an extra layer of security, but It won’t prevent the bike from being stolen. However, it will make the bike much less valuable to a thief because it disables the pedal assist. A physical lock is still needed.
On the road, the DRT e3.1 delivers a smooth and sturdy ride, with the option to lock or adjust the shocks for different terrain. While the bike's weight may be a downside (as is common for an ebike), REI seems to have struck a good balance between weight and cost. The removable battery (a little over 8 lbs) is accessible via a physical key. Removing the battery significantly lightens the load for carrying up/down stairs (I’ve been storing it in the basement) or loading on a bike rack.
For additional accessories, I recommend front and rear fenders for rainy or muddy rides, a water bottle cage, and converting the tires to tubeless (which is a conversion that REI offers at a very reasonable price).
In conclusion, the Co-Op Cycles DRT e3.1 Electric Mountain Bike has far exceeded my expectations, and I am eager to further explore its capabilities and take it on longer distance rides than I can manage on my traditional mountain bike.
Age:35–44
Weight:150–175 lbs.
Height:5'11"
Experience Level:Experienced
Riding Frequency:Once per week
Yes , I recommend this product
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Andy
Granite Falls NY
Rated 5.0 out of 5 stars
Great for all, even a Big guy
1 year ago
Big rider > 300lbs - does amazing. One of the few e-bikes for mtn biking that would work. It's really very versatile and a great ride! Battery still at 60% after 10 miles on turbo.
Age:45–54
Weight:325–350 lbs.
Inseam:32"
Height:6'2"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product
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James
Received free product
Denver, Colorado
Rated 5.0 out of 5 stars
So. Much. Fun.
1 year ago
This is my first e-bike of any kind and I was immediately impressed with the ease of charging and the intuitiveness of the controls. Huge shout out to the folks at the REI bike department for getting me set up and making sure that the suspension and everything else was dialed in for me. What I really like about this bike is that the e-assist automatically engages when you pedal so there is no need to think about a throttle and you can just ride it like any other bike. The dropper post, 29-inch tires, cushy suspension, and 1x12 gearset all position this bike perfectly to absolutely rip. I look forward to many, many long rides with the e-assist and extended battery life. Everything about this bike is exactly what I would want it to be.
Age:35–44
Weight:150–175 lbs.
Inseam:30"
Height:5'9"
Experience Level:Experienced
Riding Frequency:Daily
Yes , I recommend this product
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COride
Received free product
Denver, CO
Rated 4.0 out of 5 stars
Fun eMTB, get used to the weight!
1 year ago
I have been testing this bike for a few weeks and find it incredibly fun, especially with the speed possible at higher levels of e-assist. Moving from the minimum to maximum level of battery assistance reduces travel time by 25-35% on the same course, and of course adding speed makes it more fun to ride as well. I tested this bike in settings ranging from pavement and easy trails to rocky, Front Range singletrack with aggressive elevation gain. As a relatively small female tester, my biggest downsides of the bike come from the weight- putting a large battery into a full-suspension ebike results in something almost half my weight. Getting the bike in & out of the house and car definitely warm me up for the actual workout of riding! That being said, I can get the medium bike into the trunk of my forester without removing a wheel, taking out battery to reduce weight, etc, which is really convenient for driving through a city w a big bike theft problem and means it doesn't take any longer to pack the e3.1 into the car versus my analog bike.
I took the e3.1 for one of my first mtb rides of the season, and thanks to the e-assist I was flying up a steep, multi-mile climb that would normally require a few breaks this early in the year. The assistance only comes on while pedaling (Class 1 ebike), and has a peppy kick at higher assistance levels that makes it seem like the bike is as excited as I am to be on the trails. I did have to dismount a few times for tight switchbacks- this is not the most nimble bike and I did struggle to get the heavier weight through some precision moves. As I spent more time on the trails, especially working through rock gardens and other challenges, I realized that while my legs and lungs did not have to work as hard as they do on my analog FS mtb, my upper body was doing a lot more work controlling this bike and pulling up to clear obstacles. I would love to see a women-specific or lighter rider version of this bike come along in the future with a slightly smaller/lighter battery (battery life is a function of rider weight and amount of assistance used, so I find a single charge lasts for days of riding), narrower handlebars, etc. Larger or stronger riders may not share these concerns and I definitely don't see them as dealbreakers, just another reason to keep up with the gym!
Overall this is a super fun bike to ride. I found that on flatter pavement and trails I cycle through assistance levels more, but the adaptive trail assistance setting works great on trails- it's nice to have the assistance without needing to think about/fiddle with buttons on more technical terrain. The dropper post does not always drop as quickly/responsively as I would like, but I may still be in a break-in period and am not too worried about that overall. The 2.6" tires can roll over a lot and having the great suspension, shifting, brakes, and other components of modern bikes that lend a lot of confidence on difficult terrain. While I feel a little bit like I'm cheating having assistance on steep climbs, I think that this bike will hugely improve my fitness because it means that I can get a bunch of early season riding in without the "what a beautiful place for a heart attack" feeling that comes with getting back into climbing shape. Can't wait for dry trails to get back out there!
Age:35–44
Weight:125–150 lbs.
Inseam:30"
Height:5'5"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product
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DKlein
Spokane, WA
Rated 5.0 out of 5 stars
So much fun and very well built.
6 months ago
I picked up the DRT e3.1 in early 2024 and have thoroughly enjoyed riding it. I still have my non-motorized bike, but I've been riding the e3.1 much more often and don't feel that I'm becoming lazier with each ride. ;-) It does help immensely when the ride is nearing its end and I'm usually close to muscle failure on the regular mountain bike. It's also a lot of fun to kick it into high-power mode and zip up a hill, though that might elicit some teasing from friends. That's perfectly fine with me. The bike is well-built, and the motor and all other components have been functioning flawlessly. I highly recommend this bike.
Age:45–54
Weight:175–200 lbs.
Inseam:32"
Height:5'10"
Experience Level:Experienced
Riding Frequency:Once per week
Yes , I recommend this product
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mellott124
San Jose, CA
Rated 5.0 out of 5 stars
Pure fun
1 year ago
I come from a regular DRT 3.1 and now have the DRT e3.1. It's pure fun. Feels heavier of course, but otherwise allows me to go about twice as far, twice as fast. I can also tackle steep grades that I could never do on my regular 3.1. Loving this ebike so far. I can go about 30 miles on a charge. I have had one issue of the spyder nut coming loose on the Bosch motor, but I'm still super excited to get on this bike every time.
Age:35–44
Weight:150–175 lbs.
Inseam:30"
Height:5'6"
Experience Level:Beginner
Riding Frequency:Daily
Yes , I recommend this product
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Captain Blair
Southern California
Rated 5.0 out of 5 stars
Excellent Catalina Interior Island Explorer
1 year ago
I bought this bike primarily for one day trips in to the interior of Catalina Island. The advantage over my non electric 3.1, is the "e" capabilities pretty much guarantee getting back to the boat on time if the ride goes long. So far, bike has run flawlessly.
Age:65–74
Weight:150–175 lbs.
Inseam:32"
Height:5'11"
Experience Level:Experienced
Riding Frequency:Daily
Yes , I recommend this product
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Ncik327
Salt lake city, Utah
Rated 5.0 out of 5 stars
Awesome out on the hills!
1 year ago
Love this thing. Have had it since it was on sale and it's a blast and a half.
My first E-mtb and it hasn't disappointed me yet. I stay in turbo mode and ride hills all day for 5-7 hours and come home with a bar left. The bike feels good and is loaded with plenty goodies.
