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It's right for you if...
You want to have fun. You're searching for a playful trail bike with high-quality parts 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
A lightweight aluminum frame, a 140mm RockShox 35 Gold fork with a lockout, a SRAM NX Eagle 1x12 drivetrain with a wide range of gears for climbing, powerful 4-piston brakes, and a dropper post for room to get low on descents, corners, and jumps. Plus, fast-rolling 29er wheels with a 108-tooth Rapid Drive hub for instant engagement, and wide, grippy 2.6" tires.
The final word
High-quality parts, high quality fun. With an upgraded fork, upgraded wheels, a wide range of gears, and 4-piston brakes this bike takes trail riding shenanigans seriously.
The Walkthrough
favorite_borderWhy you'll love it
- 29er wheels and wide 2.6" tires make for a grippy, confident, and fast-rolling ride
- 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
- The fork’s lockout feature lets you temporarily lock the suspension for better efficiency on flat stretches
"Ready to rumble"
"Has the chops to squeeze every last drop of fun from local park trails, plus the talent to conquer black diamond terrain on the weekends."
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"5 out of 5"
"One of the best we've ever tried at this price. So fun and capable it makes boring trails interesting and difficult trails manageable. "
Read more
Happiness is a running dog
A Wisconsin-based musher and professional adventurer turns to bikes to keep her dogs happy and healthy.
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The man who made mountain biking
Gary Fisher and the extraordinary true story of a cycling icon.
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Features
The strong quiet type
Roscoe stays well protected with a double-sided chainstay guard, tough downtube guard, and internal cable guides that help your ride stay quiet, even over rough trails.
Progressive trail geometry
A long reach, slack head angle, steep seat angle, and short chain stays combine for a ride that's confidence inspiring, yet still nimble and fun.
Ready to get rowdy
With 140mm front travel, trail-smashing 29-inch wheels, and dialed-for-dirt frame features, Roscoe is ready to get rowdy on your favorite rides.
Boost148/110
Wider dropouts (110mm front, 148mm rear) give you the stiffness of a 27.5" wheel with all the benefits of a 29" wheel, and Boost148 in the rear lets you run wider tires and a larger chainring without affecting q-factor and pedaling efficiency.
Complete Tubeless System
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.
Learn more
Internal cable routing
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Threaded bottom bracket
More robust than pressfit, threaded BBs hold up in nasty conditions and make servicing easier.
Dropper post
Use the remote lever to lower your saddle so it's out of your way when you're descending and cornering.
ISCG mounts
International Standard Chain Guide mounts offer easy chain guide installation and adjustment.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, ISCG 05, threaded BB, Boost148 |
|---|---|
| *Fork |
Size:
XS RockShox 35 Gold RL, DebonAir spring, Motion Control damper, lockout, tapered steerer, 37mm offset, Boost110, 15mm Maxle Stealth, 140mm travel |
|
Size:
S, M, M/L, L, XL RockShox 35 Gold RL, DebonAir spring, Motion Control damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 140mm travel |
|
| Max compatible fork travel | 150mm |
| Hub front | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Hub rear | Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano 10 freehub, Boost148, 12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Rim | Bontrager Line Comp 30, Tubeless Ready, 28-hole, presta valve |
| Spokes | 14g stainless steel |
| *Tire |
Size:
XS Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60'' |
|
Size:
S, M, M/L, L, XL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60'' |
|
| *Tire part |
Size:
XS, S, M, M/L, L, XL Bontrager TLR sealant, 6oz |
|
Size:
XS, S, M, M/L, L, XL Bontrager TLR valve, 50mm |
|
| Rim strip | Bontrager TLR |
| Max tire size | Frame: 29x2.60" (XS - 27.5x2.60") Fork: see manufacturer |
| Shifter | SRAM NX Eagle, 12 speed |
|---|---|
| Rear derailleur | SRAM GX Eagle |
| *Crank |
Size:
XS, S, M, M/L, L SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 170mm length |
|
Size:
XL SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 175mm length |
|
| Bottom bracket | SRAM DUB, 73mm, BSA threaded |
| Cassette | SRAM PG-1230 Eagle, 11-50, 12 speed |
| Chain | SRAM NX Eagle, 12 speed |
| Pedal | VP-536 nylon platform |
| Max chainring size | 52mm chainline: 32T, 55mm chainline: 34T |
| Saddle | Bontrager Arvada, steel rails, 138mm width |
|---|---|
| *Seatpost |
Size:
XS, S, M TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length |
|
Size:
M/L, L, XL TranzX JD-YSP18, 150mm travel, internal routing, 31.6mm, 445mm length |
|
| *Handlebar |
Size:
XS, S Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
|
Size:
M, M/L, L, XL Bontrager Rhythm Comp, alloy, 31.8mm, 15mm rise, 780mm width |
|
| *Stem |
Size:
XS, S Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 35mm length |
|
Size:
M, M/L, L, XL Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length |
|
| Headset | FSA IS-2, 1-1/8'' top, 1.5'' bottom |
| Brake | Shimano 4-piston hydraulic disc, MT4100 lever, MT420 caliper |
| *Brake rotor |
Size:
XS, S, M, M/L, L, XL Shimano RT66, 6-bolt, 180mm |
|
Size:
XS, S, M, M/L, L, XL Shimano RT66, 6-bolt, 203mm |
| Weight | M - 29.85 lbs / 13.54 kg (with TLR sealant, no tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & Tech
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 retailer.
Rider Height
Inseam
XS
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
M/L
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
L
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
All measurements provided in cm unless otherwise noted.
| Frame size letter | Wheel size | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XS | 27.5" | 34.0 | 73.1° | 74.7° | 9.0 | 65.0° | 55.2 | 31.85 | 4.5 | 43.0 | 4.2 | 12.2 | 112.0 | 72.9 | 39.0 | 59.1 |
| S | 29" | 36.0 | 73.1° | 74.7° | 9.0 | 65.0° | 58.6 | 32.15 | 6.1 | 43.0 | 4.2 | 13.1 | 115.1 | 74.1 | 41.5 | 62.6 |
| M | 29" | 42.0 | 73.1° | 74.7° | 10.0 | 65.0° | 61.4 | 32.15 | 6.1 | 43.0 | 4.2 | 13.1 | 118.1 | 74.8 | 44.0 | 63.5 |
| ML | 29" | 43.5 | 73.1° | 74.7° | 10.5 | 65.0° | 63.0 | 32.15 | 6.1 | 43.0 | 4.2 | 13.1 | 119.8 | 74.2 | 45.5 | 63.9 |
| L | 29" | 45.0 | 73.1° | 74.7° | 11.0 | 65.0° | 64.6 | 32.15 | 6.1 | 43.0 | 4.2 | 13.1 | 121.5 | 75.5 | 47.0 | 64.4 |
| XL | 29" | 50.0 | 73.1° | 74.7° | 13.5 | 65.0° | 67.7 | 32.15 | 6.1 | 43.0 | 4.2 | 13.1 | 125.0 | 76.5 | 49.5 | 66.6 |