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In this article, I’ll help you navigate REI’s Co-op ADV gravel bike family by comparing ADV 1.1, 2.1, 2.2, 2.3, and 3.1.
You’ll learn about the differences between each model, who they are best suited for, and more.
Plus, I’ll tell you which model gives you the best value for your money to help make your decision easier.
Co-op ADV 1.1 vs. 1.2 vs. 2.1
The following table summarizes the main differences between all Co-op ADV gravel bikes.
| ADV 1.1 | ADV 2.1 | ADV 2.2 | ADV 2.3 | ADV 3.1 | |
|---|---|---|---|---|---|
| Price | $1,699.99 | $1,299.99 | $1,599.99 | $2,499.99 | $1,699.99 |
| Frame | Steel | Aluminum | Aluminum | Aluminum | Steel |
| Fork | Steel | Carbon | Carbon | Carbon | Steel |
| Available sizes | S-XXL | XS-XL | XS-XL | XS-XL | XS-XL |
| Wheels | WTB STP i23 | WTB ST i19 TCS 2.0 tubeless-ready | WTB ST i19 TCS 2.0 tubeless-ready | WTB ST i23, TCS tubeless-ready | WTB ST Lighti23 TCS 2.0 tubeless-ready |
| Wheel size | 700c | 700c | 700c | 700c | 650b |
| Tires | Schwalbe Marathon, 700c x 38 mm | Kenda Flintridge 700c x 35mm | WTB Nano Comp 700c x 40mm | WTB Nano 700c x 40mm tubeless-ready | WTB Ranger 650b x 50mm tubeless-ready |
| Drivetrain | Shimano Deore 3×10spd | Shimano Claris 2×8spd | Shimano GRX/Tiagra 2×10spd | Shimano GRX 1×11spd | Shimano Deore 2×11spd |
| Pedals | not included | not included | not included | not included | not included |
| Saddle | WTB Pure V Sport | WTB Silverado Comp | WTB Silverado Comp | WTB Silverado Comp | WTB Speed |
| Brakes | TRP HY/RD hydraulic disc | Promax DSK-718R mechanical disc | Tektro MD-C550 mechanical disc | Shimano GRX ST-RX810 hydraulic disc | TRP Hylex hydraulic disc |
| Weight | 13.61 kg 30 lbs | 10.66 kg 23.5 lbs | 10.61 kg 23.4 lbs | n/a | n/a |
| More info | n/a | ADV 2.1 review | ADV 2.3 review | ADV 2.3 review | n/a |
| Buy | Buy ADV 1.1 | Buy ADV 2.1 | Buy ADV 2.2 | Buy ADV 2.3 | Buy ADV 3.1 |
Specifications source: rei.com, updated 01/05/2023
ADV Pros & Cons Summary
I summarized the pros & cons of the ADV series below.
ADV Pros
- Suitable for a wide range of terrains
- Affordability
- Availability in multiple sizes
- Compatible with racks, kickstands, etc.
- Disc brakes
- Some models have tubeless-ready wheels and carbon forks
- REI Membership perks and benefits
ADV Cons
- Aluminum or steel frames only
- Only partially integrated cable routing
- Relatively heavy
- Pedals are not included
ADV Main Features
Let me explain the most important features of the Co-op ADV and compare the individual models.
Frame and Geometry
All ADV bikes are available in (X)S-(X)XL sizes and have either an aluminum or steel frame.
Some models, especially those starting with ‘2’, come with a lighter carbon fork that can better absorb road vibrations than aluminum or steel forks.
The geometry varies between models. ADV 1.1 and 3.1 are more upright, while those starting with ‘2’ are more aggressive.
The upright models are popular among bike packers and long-distance riders because they put less strain on the lower back and neck.
The aggressive geometry is more suitable for performance-oriented riders because the riding position is more aerodynamic and faster.
Wheels and Tires
Most ADV bikes come with 700c wheels, but the ADV 3.1 has 650b wheels with wider tires.
The wider the tires, the more suitable they are for demanding terrains, such as trails and rough gravel.
So again, consider where you will ride the most often to benefit from the tires and maximum tire clearance.
Remember that only more expensive ADV bikes have tubeless-ready wheels and tires. Some models come with tubeless-ready wheels but standard, clincher tires.
Groupset
ADV bikes are available with 1X, 2X, or 3X drivetrains. However, the trend on gravel bikes is toward 2X or 1X drivetrains since 3X drivetrains are too complicated for maintenance and shifting.
They also pose a lower risk of cross-chaining, where you have the lightest gear in the front and the heaviest gear in the back (or vice versa).
Generally, 2X gravel bikes are better for flats due to harder gears, while 1X drivetrains are suitable for rolling and hilly terrain with sudden changes of pace.
Brakes
The ADV family uses mechanical or hydraulic disc brakes, depending on the bike’s price.
Disc brakes are more effective than rim brakes, especially in the rain, as they do not lose their braking power.
The differences between mechanical and hydraulic disc brakes are that hydraulic disc brakes don’t require as much force on the brake lever and provide better braking power dosing.
On the other hand, they are slightly more expensive and more difficult to maintain.
Mounting Points
Most ADV frames have additional mounting points for kickstands, fenders, and racks.
They make it easy to install these accessories that you will appreciate, especially for long-distance trips.
The most extreme in this aspect is the ADV 1.1, which already has front and rear racks for panniers and bags, increasing your overall storage capacity.
Extras
Some Co-op ADV bikes have external cable routing, making the overall appearance worse. On the other hand, they are easier to service.
The ADV 1.1 comes with shifters at the ends of the drop bars for easier access when riding on drops. They are popular among bike packers but may not suit everyone.
TIP: Learn more about the pros and cons of flat vs. drop bars.
Lastly, REI offers many perks, such as one year of free adjustments in REI stores and free flat tire repairs, and 20% off shop services if you are Co-op Member. This pays off, considering the lifetime membership price of 30 USD.
Co-op ADV FAQ
My Verdict
So, which Co-op ADV gravel bike is the best?
Co-op ADV 2.1 offers the best price-value ratio. It’s one of the most affordable gravel bikes on the market. It has an endurance-bike-like geometry, good aluminum frame, carbon fork, and decent components. It’s competitive compared to its alternatives from the same price range (gravel bikes under $1500). Its downside is the limited gear range (2×8spd) and higher weight. However, I am sure you will experience a lot of fun with it.
