When race engineering meets full-gas fun, you get the Fourstroke R 01, our lightest full-suspension mountain bike frameset. Engineered in our Impec Lab and sharpened on the race circuit, this 01 Premium Carbon frameset floats up the climbs while progressive XC race geometry encourages you to charge downhill. But the real dark magic? APS suspension pivots tuned for maximum traction, paired with the ultra-efficient Autodrop integrated dropper seatpost. This frame-only variant comes ready for your dream XCO build. It includes the fully tunable Öhlins TXC2 Air rear shock. Now go crush it.
Frame
Fourstroke R 01 | 01 Premium Carbon with Autodrop Technology | APS Suspension System | 120mm Travel | Fully Guided Internal Cable Routing | Post Mount Disc | 12 x 148mm Boost Thru-Axle
Rear Suspension
Öhlins TXC2 Air | 190 x 45mm | DT Swiss Remote Lockout
Remote Lockout
DT Swiss Double Stage Remote Lockout
Seatpost
BMC Autodrop Integrated Dropper Seatpost | 80mm Drop
Rear Derailleur
Full Mount - UDH
Bottom Bracket
Press-Fit 92mm MTB
Rotor Size (F/R)
Rear rotor compatibility: 160mm or 180mm with an adapter
In the Box
SRAM UDH derailleur hanger | Headset including 2x10mm spacers
Tire Clearance
62mm measured tire
Weight without Pedals
3160g | Size M as pictured with all accessories
ASTM Classification
Level 3
System Weight Limit
110kg
Specifications are subject to change.
| Size | S | M | L | XL |
|---|---|---|---|---|
| Rider Height | <172 | 172-182 | 180-188 | >188 |
| Reach | 437 | 457 | 477 | 500 |
| Stack | 584 | 592 | 600 | 615 |
| BB Drop | 38 | 38 | 38 | 38 |
| Fork Length | 530 | 530 | 530 | 530 |
| Fork Rake | 44 | 44 | 44 | 44 |
| Front Center | 711 | 743 | 760 | 790 |
| Head Tube | 84 | 93 | 101 | 118 |
| Head Tube Angle | 66.5° | 66.5° | 66.5° | 66.5° |
| Rear Center | 431 | 431 | 431 | 431 |
| Seat Angle | 75.6° | 75.6° | 75.6° | 75.6° |
| Seat Tube | 420 | 440 | 470 | 490 |
| Seatpost Drop | 80 | 80 | 80 | 80 |
| Seatpost Length | 389 | 414 | 414 | 414 |
| Seatpost Offset | 0 | 0 | 0 | 0 |
| Standover Height | 727 | 727 | 727 | 727 |
| Top Tube | 576 | 599 | 623 | 651 |
| Trail | 115 | 115 | 115 | 115 |
| Wheelbase | 1140 | 1172 | 1189 | 1219 |
Located on the beautiful West Coast of British Columbia, Dunbar Cycles & Corsa Cycles are two full service bicycle shops, owned and operated by people who are passionate about every aspects of bicycles.
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When race engineering meets full-gas fun, you get the Fourstroke R 01, our lightest full-suspension mountain bike frameset. Engineered in our Impec Lab and sharpened on the race circuit, this 01 Premium Carbon frameset floats up the climbs while progressive XC race geometry encourages you to charge downhill. But the real dark magic? APS suspension pivots tuned for maximum traction, paired with the ultra-efficient Autodrop integrated dropper seatpost. This frame-only variant comes ready for your dream XCO build. It includes the fully tunable Öhlins TXC2 Air rear shock. Now go crush it.
Frame
Fourstroke R 01 | 01 Premium Carbon with Autodrop Technology | APS Suspension System | 120mm Travel | Fully Guided Internal Cable Routing | Post Mount Disc | 12 x 148mm Boost Thru-Axle
Rear Suspension
Öhlins TXC2 Air | 190 x 45mm | DT Swiss Remote Lockout
Remote Lockout
DT Swiss Double Stage Remote Lockout
Seatpost
BMC Autodrop Integrated Dropper Seatpost | 80mm Drop
Rear Derailleur
Full Mount - UDH
Bottom Bracket
Press-Fit 92mm MTB
Rotor Size (F/R)
Rear rotor compatibility: 160mm or 180mm with an adapter
In the Box
SRAM UDH derailleur hanger | Headset including 2x10mm spacers
Tire Clearance
62mm measured tire
Weight without Pedals
3160g | Size M as pictured with all accessories
ASTM Classification
Level 3
System Weight Limit
110kg
Specifications are subject to change.
| Size | S | M | L | XL |
|---|---|---|---|---|
| Rider Height | <172 | 172-182 | 180-188 | >188 |
| Reach | 437 | 457 | 477 | 500 |
| Stack | 584 | 592 | 600 | 615 |
| BB Drop | 38 | 38 | 38 | 38 |
| Fork Length | 530 | 530 | 530 | 530 |
| Fork Rake | 44 | 44 | 44 | 44 |
| Front Center | 711 | 743 | 760 | 790 |
| Head Tube | 84 | 93 | 101 | 118 |
| Head Tube Angle | 66.5° | 66.5° | 66.5° | 66.5° |
| Rear Center | 431 | 431 | 431 | 431 |
| Seat Angle | 75.6° | 75.6° | 75.6° | 75.6° |
| Seat Tube | 420 | 440 | 470 | 490 |
| Seatpost Drop | 80 | 80 | 80 | 80 |
| Seatpost Length | 389 | 414 | 414 | 414 |
| Seatpost Offset | 0 | 0 | 0 | 0 |
| Standover Height | 727 | 727 | 727 | 727 |
| Top Tube | 576 | 599 | 623 | 651 |
| Trail | 115 | 115 | 115 | 115 |
| Wheelbase | 1140 | 1172 | 1189 | 1219 |
