Fourstroke is the cornerstone Cross-Country bike designed to excel on every level. Offering beyond-the-tape versatility, this XC machine is setting a new standard with unrivalled 100mm APS dual-link suspension travel. The redefined Big Wheel Concept geometry improves performance in a lightweight full-carbon frame with integrated protection and two water bottle cages for long-distance rides. The Fourstroke FOUR arrives with a SRAM NX Eagle drivetrain, RockShox SID SL RL fork and RockShox SIDLuxe shock, SHL28OS wheels with 25mm inner width and the BMC MSP03 seatpost.
Technology
Optimized APS Suspension
Go Long
Redefined Geometry
Design Boost
Technical Overview
Frameset
Frame:
Fourstroke Carbon | APS Suspension System, 100mm Travel- Fully | Guided Internal Cable Routing | PF92 Bottom Bracket | Post Mount Disc | 12x148mm Boost Thru-Axle
Suspension
Front Suspension:
Rock Shox SID SL RL | TwistLoc Lockout | TwistLoc Lockout
Rear Suspension:
Rock Shox SIDLUXE | TwistLoc Lockout
Cockpit
Handlebar:
BMC MFB02 Alloy 750mm
Stem:
MSM01 Stem
Seatpost:
BMC MSP03 - 31,6mm - 0mm Offset
Saddle:
Fizik Antares R5
Seat
Seatpost:
BMC MSP03 - 31,6mm - 0mm Offset
Saddle:
Fizik Antares R5
Drivetrain
Gears:
1x12
Crankset:
SRAM X1 1000 Eagle 34T
Cassette:
SRAM SX EAGLE PG-1210 11-50T
Chain:
SRAM NX Eagle
Rear Derailleur:
SRAM NX Eagle
Shifters:
SRAM NX Eagle
Brakes
Brake Levers / Calipers:
SRAM Level T
Rotors:
SRAM Centerline Rotors (160/160 S-M, 180/160 L-XL) - 6-Bolt
Wheels
Rims:
SHL28OS, 25mm Inner Width
Hubs (F/R):
DC-711 (F) / DC-3248 (R)
Tires:
Vittoria Mezcal 2.35" Tubeless
Tubeless Information:
Tubeless Ready Rims / Tubeless Tires
Additional Information
Tire Clearance:
62mm (Measured Width)
ASTM Classification:
Level 3
Weight Limit:
110 Kg
| Size | S | M | L | XL |
|---|---|---|---|---|
| Rider Height | <172 | 172-182 | 180-188 | >188 |
| Reach | 437 | 457 | 477 | 500 |
| Stack | 584 | 592 | 600 | 615 |
| Bar Drop | ||||
| Bar Reach | ||||
| Bar Rise | 4 | 4 | 4 | 4 |
| Bar Sweep | 8 | 8 | 8 | 8 |
| Bar Width | 760 | 760 | 760 | 760 |
| Base Bar Drop Flat Cockpit | ||||
| Base Bar Drop V-Cockpit | ||||
| Base Bar Reach Flat Cockpit | ||||
| Base Bar Reach V-Cockpit | ||||
| BB Drop | 53 | 53 | 53 | 53 |
| BB Drop (SLACK) | ||||
| BB Drop (STEEP) | ||||
| BB Height (SLACK) | ||||
| BB Height (STEEP) | ||||
| Chainstay | ||||
| Crank Length | 170 | 170 | 170 | 175 |
| LT | BB Drop (SLACK) | ||||
| LT | BB Drop (STEEP) | ||||
| LT | BB Height (SLACK) | ||||
| LT | BB Height (STEEP) | ||||
| LT | Chainstay | ||||
| LT | Fork Length | ||||
| LT | Fork Rake | ||||
| LT | Frame Size | ||||
| LT | Front Center (SLACK) | ||||
| LT | Front Center (STEEP) | ||||
| LT | Head Tube | ||||
| LT | HT Angle (SLACK) | ||||
| LT | HT Angle (STEEP) | ||||
| LT | Reach (SLACK) | ||||
| LT | Reach (STEEP) | ||||
| LT | Rider Height | ||||
| LT | Seat Tube | ||||
| LT | ST Angle @750mm Saddle Height (SLACK) | ||||
| LT | ST Angle @750mm Saddle Height (STEEP) | ||||
| LT | ST Angle Actual (SLACK) | ||||
| LT | ST Angle Actual (STEEP) | ||||
| LT | ST Angle Effective (SLACK) | ||||
| LT | ST Angle Effective (STEEP) | ||||
| LT | Stack (SLACK) | ||||
| LT | Stack (STEEP) | ||||
| LT | Stand Over Height (80 in Front of BB) | ||||
| LT | Stand Over Height (Lowest Point) | ||||
| LT | Top Tube (SLACK) | ||||
| LT | Top Tube (STEEP) | ||||
| LT | Wheelbase (SLACK) | ||||
| LT | Wheelbase (STEEP) | ||||
| ST | BB Drop (SLACK) | ||||
| ST | BB Drop (STEEP) | ||||
| ST | BB Height (STACK) | ||||
| ST | BB Height (STEEP) | ||||
| ST | Chainstay | ||||
| ST | Fork Length | ||||
| ST | Fork Rake | ||||
| ST | Frame Size | ||||
| ST | Front Center (SLACK) | ||||
| ST | Front Center (STEEP) | ||||
| ST | Head Tube | ||||
| ST | HT Angle (SLACK) | ||||
| ST | HT Angle (STEEP) | ||||
| ST | Reach (SLACK) | ||||
| ST | Reach (STEEP) | ||||
| ST | Rider Height | ||||
| ST | Seat Tube | ||||
| ST | ST Angle @750mm Saddle Height (SLACK) | ||||
| ST | ST Angle @750mm Saddle Height (STEEP) | ||||
| ST | ST Angle Actual (SLACK) | ||||
| ST | ST Angle Actual (STEEP) | ||||
| ST | ST Angle Effective (SLACK) | ||||
| ST | ST Angle Effective (STEEP) | ||||
| ST | Stack (SLACK) | ||||
| ST | Stack (STEEP) | ||||
| ST | Stand Over Height (80 in Front of BB) | ||||
| ST | Stand Over Height (Lowest Point) | ||||
| ST | Top Tube (SLACK) | ||||
| ST | Top Tube (STEEP) | ||||
| ST | Wheelbase (SLACK) | ||||
| ST | Wheelbase (STEEP) | ||||
| Fork Length | 513 | 513 | 513 | 513 |
| Fork Rake | 44 | 44 | 44 | 44 |
| Frame Size | ||||
| Front Center | 714 | 738 | 762 | 791 |
| Front Center (SLACK) | ||||
| Front Center (STEEP) | ||||
| Head Tube | 83.84 | 93.5 | 101.25 | 117.58 |
| Head Tube Angle | 66.5 | 66.5 | 66.5 | 66.5 |
| HT Angle (SLACK) | ||||
| HT Angle (STEEP) | ||||
| Pad Reach Flat Cockpit | ||||
| Pad Reach V-Cockpit | ||||
| Pad Stack Flat Cockpit | ||||
| Pad Stack V-Cockpit | ||||
| Reach (SLACK) | ||||
| Reach (STEEP) | ||||
| Rear Center | 432 | 432 | 432 | 432 |
| Saddle Height Range | ||||
| Seat Angle | 76.7 | 76.7 | 76.7 | 76.7 |
| Seat Tube | 420 | 440 | 470 | 510 |
| Seatpost Drop | 80 | 80 | 100 | 100 |
| Seatpost Length | ||||
| Seatpost Offset | ||||
| ST Angle @750mm Saddle Height (SLACK) | ||||
| ST Angle @750mm Saddle Height (STEEP) | ||||
| ST Angle Actual (SLACK) | ||||
| ST Angle Actual (STEEP) | ||||
| ST Angle Effective (SLACK) | ||||
| ST Angle Effective (STEEP) | ||||
| Stack (SLACK) | ||||
| Stack (STEEP) | ||||
| Stand Over Height (80 in Front of BB) | ||||
| Stand Over Height (Lowest Point) | ||||
| Standover Height | 725 | 725 | 725 | 725 |
| Stem Angle | -5 | -5 | -5 | -5 |
| Stem Length | 50 | 60 | 60 | 70 |
| Top Tube | 574 | 597 | 621.2 | 649.23 |
| Top Tube (SLACK) | ||||
| Top Tube (STEEP) | ||||
| Trail | 113 | 113 | 113 | 113 |
| Wheelbase | 1139 | 1171 | 1188 | 1218 |
| Wheelbase (SLACK) | ||||
| Wheelbase (STEEP) |
