How to Choose Mountain Bikes
Cannondale Trail 8 Mountain Bike
$600.00 – to $699.00
Built to ignite a passion for the trail and raise your game, the hardtail Cannondale Trail 8 bike is ready to take on the mountains with its progressive geometry and seriously dirt-ready components.
Key Details
Wheel Size
XS: 27.5 inches
S: 27.5 inches
M: 29 inches
L: 29 inches
XL: 29 inches
Fork Travel
75 millimeters
Number of Gears
14 gear(s)
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- With 27.5 in. wheels on smaller sizes and 29 in. wheels on larger sizes, the Trail delivers the best blend of fit, fast and fun for every rider
- Durable SmartForm C3 alloy frame is light and lively, stiff and snappy
- SAVE micro-suspension delivers a smoother, more controlled ride, thanks to strategically engineered flex zones built into the frame's rear triangle
- SR Suntour M3030 suspension fork with 75 mm travel smooths out bumps, absorbs shock and improves control
- 2 x 7-speed drivetrain offers the wide range of gears you need to take on the trails
- Tektro mechanical disc brakes provide reliable stopping power for all conditions
- A slack 68° head angle creates exceptionally stable handling so you can charge the descents with confidence
- Shift and dropper cables route cleanly through the StraightShot window in down tube for an integrated look and easy maintenance; rear brake line is secured outside the frame
- Dropper post compatible—accepts 31.6 mm dropper posts (not included) for more confident descending
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
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 Cannondale Trail Product LineView all Cannondale Hardtail Mountain Bikes- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 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)
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.
| Best Use | Mountain Biking |
|---|---|
| Mountain Bike Style | Trail |
| Frame | SmartForm C3 Alloy, post mount disc |
| Bike Suspension | Front Suspension |
| Fork | SR Suntour M3030, coil, 42 mm offset (27.5 in.) 46 mm offset (29 in.) |
| Fork Travel | 75 millimeters |
| Crankset | Prowheel, 36/22T |
| Bottom Bracket | Cartridge, BSA-73, square taper |
| Shifters | microSHIFT Thumb-Tap, 7-speed |
| Front Derailleur | Shimano Altus, 34.9 mm clamp |
| Rear Derailleur | Shimano Tourney |
| Rear Cogs | 11-34T, 7-speed |
| Number of Gears | 14 gear(s) |
| Brake Type | Mechanical Disc Brake |
| Brakes | Tektro cable-actuated disc, 160/160 mm rotors |
| Brake Levers | Tektro |
| Rims | WTB SX19, 32H |
| Front Hub | Formula quick-release |
| Rear Hub | Formula quick-release |
| Wheel Size | XS: 27.5 inches S: 27.5 inches M: 29 inches L: 29 inches XL: 29 inches |
| Tires | XS: WTB Ranger Comp, 27.5 x 2.25 in., DNA Compound S: WTB Ranger Comp, 27.5 x 2.25 in., DNA Compound M: WTB Ranger Comp, 29 x 2.25 in., DNA Compound L: WTB Ranger Comp, 29 x 2.25 in., DNA Compound XL: WTB Ranger Comp, 29 x 2.25 in., DNA Compound |
| Tire Width | 2.25 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | 6061 alloy riser, 31.8 mm, 25 mm rise, 700 mm |
| Stem | 6061 alloy, 31.8 mm, 8 deg. |
| Seat Post | Cannondale 3, 6061 alloy, 31.6 x 350/400 mm |
| Saddle | Cannondale Stage 3 |
| Pedals | Cannondale Platform |
| Headset | 1-1/8 in. |
| Chain | KMC Z7, 7-speed |
| Weight | 32 lbs. 14.4 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
Cannondale Bikes (183884, 184495, 184494, 184493, 184497)
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Height Range | 4'6" - 5'2" | 5'1" - 5'4" | 5'4" - 5'8" | 5'7" - 6'0" | 6'0" - 6'3" |
| Reach | 36.5 | 40.2 | 42.5 | 44.7 | 47.0 |
| Stack | 60.7 | 61.6 | 62.4 | 63.3 | 64.3 |
| Effective Top Tube | 54.5 | 58.5 | 61.0 | 63.5 | 66.0 |
| Seat Tube Center-Top | 34.5 | 40.0 | 44.0 | 48.0 | 52.0 |
| Standover Height | 71.0 | 74.6 | 79.5 | 82.0 | 85.0 |
| Head Tube Length | 9.5 | 10.5 | 11.5 | 12.5 | 13.5 |
| Head Tube Angle (degrees) | 68.0 | 68.0 | 68.5 | 68.5 | 68.5 |
| Seat Tube Angle (degrees) | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 |
| Bottom Bracket Height | 30.4 | 30.4 | 30.8 | 30.8 | 30.8 |
| Wheelbase | 106.7 | 110.8 | 114.0 | 116.6 | 119.2 |
| Chainstay | 44.0 | 44.0 | 44.5 | 44.5 | 44.5 |
| Fork Offset | 4.2 | 4.2 | 5.1 | 5.1 | 5.1 |
Sizing Notes
Measurements are stated in centimeters unless otherwise indicated.
How we measure bikes
- 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
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Most Helpful Favorable Review
GOOD ALL AROUND BIKE - THINGS TO CONSIDER
JW334 years ago
The 2021 is a great beginner bike at it's price point. It is also a good bike for the more experienced riders as well. There are some components on the lower end that the average rider will not notice. For you more experienced riders, this is a great frame and worth saving some pocket change and upgrade the components.
- PLEASE NOTE - I am 5'10 with a pretty portioned torso and trunk. My torso is only slightly longer. - I really suggest you DO NOT go by size recommendations. Based on the geometry and Cannondale's size chart I was stuck between the medium and large. When that is the case I always size down so I prepaid for a medium. Lucky when I got there they had a small b/c the medium was still a bit BIG. Obviously the 29 inch & 27.5 inch come into play but if you are not coming from 29's it will feel like a very big bike.
I was looking at a Specialized Rockhopper, Trek Marlin 5 & Haro Flightline. I am very happy I went with the Trail 8.
Below are the basic things I did not like:
- The seat is a bit uncomfortable.
- The pedals it comes with are very cheap.
- The crank arm is kinda long.
****I have already already upgrade the seat and pedals
Next upgrades are the crank arms, front & rear derailleurs and eventually the forks and all the entry level components.
Hope this helps.
JW33
Concord, MA
38 people found this review helpful
Most Helpful Critical Review
Avoid if possible
LF20214 years ago
Cannot recommend this bike. Unfortunately, made the mistake of buying two of them. Too many chain issues and have gone through two front derailleurs that ended up broken. No crazy off-roading or mountain biking - Paved roads mostly. I don't feel these run large as some have suggested.
LF2021
Los Angeles, CA
34 people found this review helpful
Customer Images
squawk3232
AL
Does what it's meant to do
4 years ago
A solid entry-level bike. It competes well against similarly priced/marketed bikes. There is definitely room for upgrades from the stock entry-level components, but that will be the case with any bike at this price point. It wins over its competitors with the drivetrain: it has a 2-by setup, with a larger range on the rear cassette. Other similarly-priced bikes have more travel on the fork (100mm to this 75mm), though. The seat is not the most comfortable, but that shouldn't be a deciding factor. As another review mentioned, it runs slightly large - it may be worth getting the smaller size if between 2 sizes.
Age:18–24
Weight:175–200 lbs.
Height:6'0"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Yes , I recommend this product
ProfessorPlum
Richmond, VA
Great bike, runs very large
4 years ago
Having taken this on a 2-hour trail ride, I'm thrilled with the bike. It's sturdy, the tires are pretty good for an entry-level bike, and it's really not that heavy even with the basic shocks. The only issue is sizing. I'm 5'6" with a 29 to 30" inseam, so that put me in a medium by the size chart. Since my road bike (Jamis) is a medium, it sounded reasonable. No way. The medium seemed big when I picked it up, and after my test ride, I knew I had to swap it for a small. Even with the saddle all the way down, I just make it to a comfortable spot on the pedals. The reach to the handlebars is also a bit large. Size down for the right fit.
Age:35–44
Weight:150–175 lbs.
Inseam:30"
Height:5'6"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product
CHRJWELLS
Huntington Beach CA
Love the bike, good beginning for upgrading.
4 years ago
The bike rides smooth and shifting is no problem for it. The bike does run big so if you are barley into the next hight zone, it wouldn't hurt to maybe go a size lower, just don't go a size higher. The fork is very soft and even with the preload adjusted to the max with my body weight it's still very soft and squishy. The bike its built solid for the medium and so much room for future improvements like replacing the fork with an air suspension with a lockout. There is no rear suspension so if you're riding trails, just know the rear tire could lose grip a lot, but casual riders would love this as well.
Age:18–24
Weight:225–250 lbs.
Height:5'8"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Yes , I recommend this product
Amy C
Gloucester Ma
Great bike!
4 years ago
Great ride! I’m 5’8 and bought a size medium which is perfect! I ride easy trails and road. The tires make trail riding so much easier! I’m so happy that I purchased this bike! I highly recommend!
Age:45–54
Weight:125–150 lbs.
Height:5'8"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Yes , I recommend this product
George
Albuquerque, NM
Sizing is way off
4 years ago
I just picked up this bike today and rode around the block. I am 5'9" and according to the sizing table I needed a large one. I already have a Cannondale road bike that I bought according to the sizing and returned next day for a medium. So this time I bought a medium. But the medium has 29" wheel (which is a size not too easy to find) as the large one. The bike fits, but barely at the lowest position of the saddle I barelyt reach the pedals (I am thinking swing off part of the stem). Remember, I was sized to large. If you are on the low end of medium, definitely get the small one. Since I do not plan serious mountain biking, but just to ride along the grand kids on dirt roads (my road bike would not take it) I think I will keep it.
Age:55–64
Weight:175–200 lbs.
Height:5'9"
Experience Level:Experienced
Riding Frequency:Once per week
Yes , I recommend this product
JW33
Concord, MA
GOOD ALL AROUND BIKE - THINGS TO CONSIDER
4 years ago
The 2021 is a great beginner bike at it's price point. It is also a good bike for the more experienced riders as well. There are some components on the lower end that the average rider will not notice. For you more experienced riders, this is a great frame and worth saving some pocket change and upgrade the components. - PLEASE NOTE - I am 5'10 with a pretty portioned torso and trunk. My torso is only slightly longer. - I really suggest you DO NOT go by size recommendations. Based on the geometry and Cannondale's size chart I was stuck between the medium and large. When that is the case I always size down so I prepaid for a medium. Lucky when I got there they had a small b/c the medium was still a bit BIG. Obviously the 29 inch & 27.5 inch come into play but if you are not coming from 29's it will feel like a very big bike. I was looking at a Specialized Rockhopper, Trek Marlin 5 & Haro Flightline. I am very happy I went with the Trail 8. Below are the basic things I did not like: - The seat is a bit uncomfortable. - The pedals it comes with are very cheap. - The crank arm is kinda long. ****I have already already upgrade the seat and pedals Next upgrades are the crank arms, front & rear derailleurs and eventually the forks and all the entry level components. Hope this helps.
Age:35–44
Weight:175–200 lbs.
Inseam:32"
Height:5'10"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Yes , I recommend this product
Gretchen
Portland
Awesome Bicycle
4 years ago
I’ve been riding this bike on Oregon trails and city commuting for about a month with zero issues. The sizing is perfect, if you are honest about your actual height. Most people exaggerate their height and give themselves an extra 2”. Be REAL and this bike will fit you perfectly. I stand at 5’11” and the Large frame fits me like a glove.
Age:35–44
Weight:125–150 lbs.
Inseam:32"
Height:5'11"
Experience Level:Experienced
Riding Frequency:Daily
Yes , I recommend this product
RhysToTheOccasion
Erwin, TN
Great bike, slightly rough shift
3 years ago
Amazing bike, the one knock is it shifts a little rough on the front gears, otherwise it would be a perfect review.
Age:25–34
Weight:175–200 lbs.
Inseam:34"
Height:6'0"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Yes , I recommend this product
Ari123
Woodbridge, VA
runs very large
4 years ago
Size is not accurate, I'm 5.6 and according to specs I should be a medium; however, upon inspecting the the bike and doing the pre-ride at REI it was difficult to get on bike and pedal comfortably. The seat post does not drop any lower. I was happy to try and demo it but I decided to purchase another bike in stock online.
Age:35–44
Height:5'6"
No, I do not recommend this product
Jeevan
Dallas, TX
Good bike
4 years ago
Its a pretty descent starter bike. Holds up pretty well on street, gravel and paved bike paths. Perfect upright position for a mountain bike without hurting the back even though i ride for 1 hr.
Age:35–44
Weight:125–150 lbs.
Height:5'7"
Experience Level:Beginner
Riding Frequency:Daily
Yes , I recommend this product
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