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Fast and comfortable spinning down the highway, the Co-op Cycles ADV 2.1 bike doesn't flinch when you leave the pavement behind—it just digs in and grinds gravel.

Color: Pirate Black
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Features

  • Aluminum frame and tapered-steerer carbon fork both feature 12mm thru axles for lateral stiffness and weight savings​
  • Shimano Claris 2 x 8 drivetrain with compact double cranks provides an excellent range of gears for both speed and varied terrain
  • Promax flat-mount dual-piston mechanical disc brakes​ deliver powerful, reliable speed control
  • 31.8mm Co-op Cycles aluminum handlebars have just a touch of flair to provide more confidence in tricky conditions
  • Kenda Flintridge 700c x 35mm tires are built for speed with a clean centerline for efficiency on hardpack terrain and shoulder knobs for grip on gravel
  • All-gender fit simplifies the buying process and fits riders 5'0"–6'3"
  • Durable frame and components make this bike ready for adventure from pavement to gravel​
  • Add a frame bag or rear rack to extend your adventure overnight (bag and rack not included)
  • Pedals not included
  • NOTE: Specs and images are subject to change based on component availability

Imported.

This 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:
  • 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 bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

View the Co-op Cycles ADV Product LineView all Co-op Cycles Gravel Bikes

Technical Specs

Best Use

Road Cycling

Bikepacking

Gravel Cycling

Frame

Double-butted 6061 aluminum

Fork

Carbon with 1-1/8 to 1-1/2 tapered steerer tube

Bike Suspension

No Suspension

Crankset

Shimano FC-RS200, 50-34t

Bottom Bracket

Shimano UN26

Shifters

Shimano Claris

Front Derailleur

Shimano Claris

Rear Derailleur

Shimano Claris

Rear Cogs

Shimano Claris, 8-speed 11-34t

Number of Gears

16 gear(s)

Brake Type

Mechanical Disc Brake

Brakes

Promax DSK-718R cable actuated dual piston

Brake Levers

Promax

Rims

WTB ST i19 TCS 2.0 (tubeless ready)

Front Hub

DM 32H, 12mm thru axle

Rear Hub

DM 32H, 12mm thru axle

Wheel Size

700c

Tires

Kenda Flintridge 700c x 35mm with reflective patch and flat protection

Tire Width

35 millimeters

Handlebar Shape

Drop Bar

Handlebar

Co-op Cycles aluminum with 12-degree flair​

Stem

Co-op Cycles 6061 aluminum

Seat Post

Co-op Cycles aluminum with 8mm setback​

Saddle

WTB Silverado Comp

Pedals

Not included

Headset

Integrated 1-1/8 x 1-1/2 in. tapered

Chain

KMC HG40

Weight

23.5 pounds

Bike Weight

Bike weight is based on median size, as sold, or the average of two median sizes.

Gender

Unisex

Sustainability

From a Climate Label Certified brand

Additional Information

Size Chart

Co-op Cycles Bikes (159858)
XSSMLXL
Height Range5' - 5' 3"5' 3" - 5' 6"5' 6" - 5' 9"5' 9" - 6'6' - 6' 3"
Reach373380386394404
Stack521532554571592
Effective Top Tube513528545563585
Seat Tube Center-Top385435470510545
Standover Height698.5727756785811
Head Tube Angle (degrees)7070.571.571.572
Seat Tube Angle (degrees)7574.57473.573
Wheelbase10221029102910401045
Chainstay432432432432432
Fork Offset5555505050

Sizing Notes

Measurements are stated in millimeters, unless otherwise indicated

How we measure bikes

  1. 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.
  2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
  3. 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.
  4. 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.
  5. 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.
  6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
  7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
  8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
  9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
  10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
  11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
  12. 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.
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Better gear is built together

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.

List of certifications which include The Climate Label certification,
        member informed certification and 100% satisfaction guarantee
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List of certifications which include The Climate Label certification,
        member informed certification and 100% satisfaction guarantee

Reviews
75 reviews with an average rating of 4.4 out of 5 stars

Ratings Snapshot

Product Rating

38 out of 44 (86%) reviewers recommend this product

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Average Customer Ratings

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Most Helpful Favorable Review

5 reviews with an average rating of 4.0 out of 5 stars
Fine bike, understandably sub-par build
MCRR
5 years ago
I am primarily comparing to: Aluminum road race bike; old steel commuter. This was my first foray off-road. Intended for riding to trailheads & bikepacking. Reporting after ~300mi of riding. Rides included road, gravel, rocky singletrack. The review rating is for the bike only, not the build. Fit: I am 5'10" and got a size small (M; max recommended height = 5'9"), since the geometry best fit my road bike. Upgrading to a 110mm stem made the bike quite comfortable (M-size stem is 90mm; not listed on website). Note that the crank arms are 170mm for the M-size, which I could not find listed on the website. If you care about crank arm length, call REI to double check before purchasing. Performance: The bike is comfortable. I've done an 11 hour ride (~9.5hrs moving time) with no back pain or saddle sores. The bike is not fast. This is unsurprising compared to a road bike, but the cheap drivetrain specs lack stiffness. I'd look for a cyclocross-specific bike if you want speed on gravel. The 8-speed cassette hurts speed as well, with big jumps meaning you ca ride at 15mph or 17.5mph, but not in between at a comfortable cadence. A comparable bike with 9-10speed cassette would make for more comfortable speed regulation. Brakes and handling are fine. Notes: 1. The bike is compatible with non-disc-specific rear racks. Disc-specific racks will fit, but flare out an extra inch on each side. 2. The bike comes with plugs, but not screws for rear-rack attachment points. If buying a rack, make sure you get screws. In a pinch, the bottle cage screws work for the rear rack attachment points. 3. The range on the saddle rails seems small, though I can't confirm this. 4. Overall, I'd recommend this bike if you have to ride the road to get to dirt, and want the flexibility to explore a range of trails. REI bike build: The bike build seemed hasty. This is understandable due to the COVID craziness and how that seems to have impacted sales and bike shop workloads. I do not intend to blame the mechanics, since it sounds like they've had a lot to get through. The following is a "buyer beware" commentary. I picked the bike up in-store. The in-store pickup deal, as written on the purchase agreement ("THESE ITEMS WERE CHECKED PRIOR TO DELIVERY OF THE BICYCLE TO THE CUSTOMER"), states that the following services (among others) are performed: Wheels trued; derailleurs adjusted; etc... While all other "checks" were 100% satisfactory, the wheels were only kinda-sorta true, and the shifting was bad beyond anything I've experienced from cable stretch in 10 years of working on my own bikes. The wheels are ride-able, though I'll have to re-true them soon. Just a nuisance. The derailleur adjustment was sloppy. Limit screws were not set and the trim of the front derailleur was non-functional (cable was way too loose). Micro-adjusters were cranked to maximize tension, which screams "rushed." Like I said, I've never had a bike shift so poorly even weeks after installing new cables. IMO, that does not meet the purchase agreement criteria, even with a few days for the cables to stretch. But hey, COVID, they're doing their best to get bikes out the door. My recommendation: Give the mechanics some slack, but be ready for a substantial at-home tuneup before riding and be sure to bring tools with you on your first rides. Adding an option for bike-savvy customers to request partial builds (e.g. headset and crankset install only) for in-store pickup could be good way take some of the workload off the mechanics.
MCRR
Seattle, WA
73 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 1.0 out of 5 stars
Unbelievably disappointed
Matt
3 years ago
Ive never spent so much time effort and money on a product and gotten so little use out of it. Despite being a gravel bike, I popped a tube literally any time I took it off of the pavement, even for just a few moments to pass someone, and several times on flat pavement riding normally. I decided to go tubeless because the bike was “tubeless ready”. Turns out that just means they taped the rims and possibly not even very well because Ive never not had a slow leak. I had to buy all new tires for the bike and even then it didnt hold air because the valves REI sold me dont seal. I have spent easily 20 hours on maintaining this bike for maybe a total of 20 rides. Ive spent so mich time and money on this bike and Im just getting fatter and angrier because I cant use the thing.
Matt
Denver
31 people found this review helpful

Customer Images

Anonymous
Scotts Valley
Rated 5.0 out of 5 stars

Needed a few modifications/upgrades but I'm happy!

3 years ago

I've been riding this bike fo a few month, taken it on everything form smooth roads to dicy single track and I can say with confidence that this bike performs wonderfully, however I did had to adjust the brake alignment (on front and back) and straighten the front rotor from factory (but the rotor bolts were glued on!) and I had to replace the bike cables as they stretched out a lot more that I thought they would for only a few months. I am planning on replacing the tires with some better offload tires (the frame should* fit up to a 47mm). Overall the bike provides a great riding experience, it's comfortable (after you buy a better saddle) and smooth. I would recommend this bike to anyone who wants an entry-level gravel/road bike to take on all their ADVentures!

Age:Under 18
Weight:125–150 lbs.
Inseam:34"
Height:6'0"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product

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Chris
Los Angeles, CA
Rated 4.0 out of 5 stars

Highly recommended for the price!

5 years ago

Two rides so far with this bike including a 65 mile, 5K ascent ride along Mulholland and PCH yesterday. Great bike for the price and my first drop bar bike in a while, as I ride mostly mountain and hybrid bikes. Appreciate the brake shifters, which differs this from the ADV 3.1 with its weird 80s throw-back bar end shifters. Good looking bike and very comfortable so it will probably be my main road/light trail bike. One problem I had yesterday was two flats with the factory Kenda tires (it was an all road ride, but these tires seem to attract thorns). The rubber is too soft for our hard So Cal thorns, so I ordered Continental hybrid tires which are more resistent.

Age:45–54
Weight:175–200 lbs.
Inseam:34"
Height:6'0"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product

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SeriousBug
IL
Rated 5.0 out of 5 stars

Just great

1 year ago

I've been riding this bike for a few weeks now, and I'm very happy with it. This is my first road bike so keep that in mind while reading my review, but the bike is comfortable, the tires inspire confidence when cornering or going over rough terrain. You get plenty of gears both for climbing and speed, and shifting is smooth. The mechanical disk brakes have more than enough stopping power, and are very responsive. The bike is very noticeably lighter than my old steel frame hybrid. The components on the bike might not be the top of the line, but everything works well and I think the bike delivers great value at its price.

Age:25–34
Weight:200–225 lbs.
Height:6'0"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Yes , I recommend this product

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Hawkeye
Minneapolis, MN
Rated 4.0 out of 5 stars

Solid bike 👍🏽

2 years ago

Really good bike. I bought it Summer of 2020, so 3 years now. I primarily ride on the road but have had a a couple outings on gravel for about 5-7 miles total distance. Probably have put a couple thousand miles on it so far. Speed isn’t that of a road bike, but it gets the job done for me. Average about 18-20 mph in year 3. Been on a couple 100-mile rides and several 50-70 mile rides. Typical ride is 25. Only one flat so far and that was a slow leak that I discovered while it was in the garage. Definitely happy with the purchase.

Age:35–44
Weight:175–200 lbs.
Inseam:32"
Height:5'11"
Experience Level:Experienced
Riding Frequency:Once per week
Yes , I recommend this product
Helpful?
Richard
Long Beach, CA
Rated 3.0 out of 5 stars

Very disappointing bike

2 years ago

I purchased this bike a year and a half ago and have been very disappointed with it. The front gearing is a bad choice because the big gear is larger than normal and the small gear is barely half its size so a shift down requires shifting up in back to minimize the vast difference in gear ratios. Yesterday I had to take the bike in for service because the nail head at the hub on two spokes had sheared off leaving the end hanging. I have been maintaining my own bikes for at least 60 years and I have never had to replace a spoke for any reason other than overtightening at the wheel which stripped the threads. Overall I have not been very happy with this purchase.

Age:65–74
Height:5'10"
Experience Level:Experienced
Riding Frequency:Multiple times per week
No, I do not recommend this product

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Andrew W
Seattle, WA
Rated 5.0 out of 5 stars

Reliable commuter, fun to ride!

3 years ago

The ADV 2.1 is a great bike for commuting in and around Seattle. About a month in to riding my ADV, the chain and derailleurs had stretched and shifted a bit, so the complimentary small adjustments which the REI staff do for new purchases was really appreciated and kept the bike quiet. They made the adjustments within ten minutes of my bringing the bike in! Now that it is raining, I am appreciating the disc brakes and their responsiveness in the wet, and am hoping to keep riding to work throughout the year. I am not the best with working on bikes myself, so I had bike mechanics install my fenders, but the ADV has all the attachments you need for fenders and pannier racks. The ADV rides smoothly and shifts well!

Height:6'0"
Experience Level:Beginner
Riding Frequency:Daily
Yes , I recommend this product

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EG 1144
Valencia, California
Rated 4.0 out of 5 stars

Solid recreational bike.

1 year ago

If you’re looking for a versatile bike the ADV 2.1 is a solid choice. I’ve ridden for 50 years (now in the plus 65 age group) and chose a reliable bike with a company that has a solid maintenance department. I had a road bike previously and wanted a bike that could handle more surfaces (i.e. gravel). I ride maybe 500 miles per year so durability, low maintenance, solid feel, and comfortable ride were all high priority. I no longer ride 25 miles at a time however ride frequently. For the price it’s a bit high but have had it for two years without issue. I’d recommend for recreational use with moderate to intermediate climb. Shifting is fluid, frame is light enough and is stable on the turns.

Age:65–74
Weight:175–200 lbs.
Inseam:32"
Height:5'11"
Experience Level:Experienced
Riding Frequency:A few times per month
Yes , I recommend this product

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Mincho
Sacramento, CA
Rated 5.0 out of 5 stars

Commuter

2 years ago

After urban commuting for more than a decade on an ancient road bike, I bought the Adv 2.1 as a replacement. I wanted something faster than a Hybrid bike but still durable for urban commuting and I am loving this bike. The REI shop installed fenders and a rear basket for me.

Age:35–44
Weight:150–175 lbs.
Height:5'7"
Experience Level:Experienced
Riding Frequency:Daily
Yes , I recommend this product
Helpful?
mmoodie81
Denver CO
Rated 5.0 out of 5 stars

great bike for a good price

3 years ago

This bike is fun to ride and quite versatile. It’s like a road bike without the annoying minuscule tires that puncture all the time, and can actually go tubeless with a tire change. You can go fast like a road bike but drop a staircase and hit the dirt if you want without worrying that you’re going to break it. XD A lot of ppl say this frame runs on the large end, but idk much about that stuff. I’m 5’7” and love the small I ordered. I got my bike at the flagship in Denver and they did an excellent job setting it up! There’s a bunch of cool people at that shop.

Age:35–44
Weight:125–150 lbs.
Inseam:32"
Height:5'7"
Experience Level:Experienced
Riding Frequency:Daily
Yes , I recommend this product

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Cjken
Bowling green Ky
Rated 4.0 out of 5 stars

Great budget gravel bike

3 years ago

I got this bike for gravel, I ride some rutted out loose gravel with some steep roads. I am amazed at how nimble , comfortable and capable it is. I had the REI tech mount 45mm riddlers and a head tube raiser to raise handle bars a little to give it a little more of a mountain bike feel. I would have given it a perfect score but the mechanical brakes are not great but good luck finding hydraulic breaks at this price point.

Age:55–64
Weight:200–225 lbs.
Inseam:34"
Height:6'2"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product

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