It's right for you if...
You want to have fun. You're searching for a playful trail bike with high-quality parts and plus-sized tires so that when you're out on the trail, the only thing you have to worry about is your face hurting from smiling too much.
The tech you get
Roscoe 8 features a strong Alpha Gold Aluminum frame with internal routing for cable protection and a clean look, confidence-inspiring 27.5+ tires mounted to Tubeless Ready Bontrager Line rims, and a 120mm RockShox 35 Gold fork with Motion Control damper and lockout. Plus, a dropper post, a SRAM NX Eagle 1x12 drivetrain, and Shimano hydraulic disc brakes.
The final word
High-quality components for high-quality trail days. It's all about fun, but it's also all about performance. With a 12-speed drivetrain, hydraulic disc brakes, wide handlebars, and 27.5+ wheels, this bike takes trail riding shenanigans seriously.
favorite_borderWhy you'll love it
- It's more fun to be a better rider: Roscoe is so stable and forgiving, it's like an instant ability upgrade
- Even when the trail gets rough, the wide 27.5x2.8˝ tires can deliver confidence, traction, and stability
- The dropper post lets you lower your saddle on the fly so it's out of the way on descents
- The RockShox fork's Solo Air spring can easily be adjusted for a specific rider weight, and it's lighter than a coil spring
You might also like
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. The rim strips are already installed; just add TLR valves and sealant.
Locked suspension means your fork remains inactive, increasing pedaling efficiency. Perfect for extended road sections where efficiency is more important than bump absorption.
Going for a long ride? Rack mounts make carrying accessories a breeze.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141, 5mm QR|
RockShox 35 Gold, Solo Air spring, Motion Control damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 100mm travel
S, M, M/L, L, XL, XXL
RockShox 35 Gold, Solo Air spring, Motion Control damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel
|Front Hub||Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle|
|Rear Hub||Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141, 5mm QR|
|Rim||Bontrager Line 40, Tubeless Ready, 28-hole, 40mm width, presta valve|
|Tire||Maxxis Rekon, tubeless, 60 tpi, 27.5x2.80''|
|Shifter||SRAM NX Eagle, 12 speed|
|Rear Derailleur||SRAM NX Eagle|
Truvativ Descendant 6k Eagle, GXP, 30T alloy ring, Boost, 170mm length
M, M/L, L, XL, XXL
Truvativ Descendant 6k Eagle, GXP, 30T alloy ring, Boost, 175mm length
|Bottom Bracket||Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle|
|Cassette||SRAM PG-1230 Eagle, 11-50, 12 speed|
|Chain||SRAM NX Eagle, 12 speed|
|Pedal||VP-536 nylon platform|
|Saddle||Bontrager Arvada, steel rails, 138mm width|
TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length
M, M/L, L, XL, XXL
TranzX JD-YSP18, 130mm travel, internal routing, 31.6mm, 425mm length
Bontrager alloy, 31.8mm, 15mm rise, 720mm width
S, M, M/L, L, XL, XXL
Bontrager alloy, 31.8mm, 15mm rise, 750mm width
|Grips||Bontrager XR Trail Comp, lock-on|
XS, S, M
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree, 50mm length
M/L, L, XL, XXL
Bontrager Rhythm Comp, 31.8mb, Knock Block, 0 degree, 60mm length
|Headset||Semi-integrated, cartridge bearing, 1-1/8'' top, 1.5'' bottom|
|Brake||Shimano hydraulic disc, MT501 lever, MT500 caliper|
|Brake Rotor||Shimano RT56, 6-bolt, 180mm|
|Weight||M - 14.55 kg / 32.07 lbs (with tubes)|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).|
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
153.0 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise noted.
|Frame size number||Frame size letter||A — Seat tube||B — Seat tube angle||Effective seat tube angle||C — Head tube length||D — Head angle||E — Effective top tube||F — Bottom bracket height||G — Bottom bracket drop||H — Chainstay length||I — Offset||J — Trail||K — Wheelbase||L — Standover||M — Frame reach||N — Frame stack|