Clearance reason：last piece
The BROSS Keystone 3S is a lightweight carbon hardtail engineered for cross-country speed. A monocoque carbon frame with fully internal cable routing, Boost 148×12 rear spacing and a press-fit bottom bracket stays stiff at the pedals and silent on the trail. Up front, a RockShox Judy TK 100 mm fork absorbs chop so you stay planted through technical XC sections. The Shimano Deore M6100 12-speed single-ring drivetrain delivers the full 10–51T range with crisp Hyperglide+ shifts — no front derailleur, no clutter, every gear you need.
Specifications
- Frame — Full carbon fiber, fully internal cable routing, Boost 148×12 rear, press-fit BB, 1X system
- Fork — RockShox Judy TK, tapered steerer, 100 mm travel, 15×110 mm Boost, TurnKey lockout
- Shifter — Shimano SL-M6100, 12-speed
- Rear Derailleur — Shimano RD-M6100-SGS, Shadow RD+, Hyperglide+
- Cassette — Shimano CS-M6100, 12-speed, 10–51T
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Crankset — PROWHEEL MPX-B, 12-speed, 1X —
[32T, confirm] - Chain — Shimano CN-M6100, 12-speed
- Brakes — Shimano MT200 hydraulic disc
- Rotors — Shimano RT-26, 160 mm (F) / 160 mm (R)
- Rims — BROSS aluminum
- Hubs — BROSS sealed bearing — 15×110 mm (F) / 148×12 mm (R) Boost
- Tires — Continental RaceKing 29×2.0
- Handlebar — BROSS aluminum, 720 mm
- Stem — BROSS aluminum, 6°
- Seatpost — BROSS aluminum, 30.9 × 350 mm
- Saddle — BROSS
- Headset — BROSS internal-routing
Feature
- Full-Carbon XC Frame — Monocoque construction with fully internal routing for a clean front end and protected cables. Boost 148×12 rear triangle drives power straight to the trail.
- Shimano Deore M6100 1×12 — 10–51T cassette = 510% range; Hyperglide+ shifts under load. One chainring means fewer drops, less maintenance.
- RockShox Judy TK 100 mm — TurnKey lockout kills pedal bob on climbs and tarmac, opens instantly on rough terrain. Tapered steerer for precise steering.
- 29" RaceKing Wheels — Continental RaceKing 29×2.0 rolls fast and corners hard; Boost sealed-bearing hubs (15×110 / 148×12) for a stiff, durable wheelset.
- Shimano MT200 Hydraulic Disc — Consistent, modulated braking with 160 mm RT-26 rotors front and rear — confident in Dubai heat and long desert descents.
- Race-Ready Cockpit — 720 mm alloy bar, 6° stem and 30.9 mm seatpost tuned for XC speed and control straight out of the box.