BMC Fourstroke 01: suspension setup & specs
The BMC Fourstroke 01 is a cross-country full-suspension bike with 110–120 mm of fork travel and 100–120 mm at the rear. Here you will find all 2 current builds with fork, shock and shock size, plus matching SAG and tyre pressure starting values.
Calculate the setup for your BMC Fourstroke 01 →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Shock | Shock size | Rear travel | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|
| Three | RockShox SID SL Select 3P (110 mm) | RockShox SIDLUXE Select+ 3P | – | 100 mm | 12.1 kg | – | Setup → |
| Two | RockShox SID Select 3P (120 mm) | RockShox SIDLUXE Select+ 3P | – | 120 mm | – | – | Setup → |
How it compares
110–120 mm at the fork almost exactly matches the 120 mm median of the 23 bikes in the “cross-country full-suspension bike” category in our database. Within BMC’s mountain bikes, it sits between the BMC Twostroke 01 and the BMC Fourstroke R 01 on travel. The frame is made of carbon.
At a minimum of 12.1 kg (Three build), the BMC Fourstroke 01 is heavier than its category median of 10.8 kg – 1.3 kg more. Fork and shock come from RockShox on every build. In total, 2 different forks are used, from the RockShox SID SL Select 3P to the RockShox SID Select 3P. BMC specifies a maximum system weight of 110 kg. Subtracting roughly 12 kg for the bike leaves about 98 kg for rider, clothing, backpack and luggage.
Setup notes for this spec
- Fork (RockShox SID SL Select 3P): air goes in through the valve on top of the left leg. After every change, compress the fork firmly a few times before measuring SAG.
- Rebound: turn the red RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Shock (RockShox SIDLUXE Select+ 3P): get on the bike in your normal riding position, step off carefully and read the O-ring. Always cycle the shock a few times after pumping.
Target SAG for the BMC Fourstroke 01
The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If BMC specifies its own target SAG for your model, that takes priority.
110 mm fork (Three)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 19 mm |
| Trail | 20 % = 22 mm |
| Enduro / rough | 22 % = 24 mm |
| Bike park | 20 % = 22 mm |
120 mm fork (Two)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 20 mm |
| Trail | 20 % = 24 mm |
| Enduro / rough | 22 % = 26 mm |
| Bike park | 20 % = 24 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
For 2.35″ wide tyres, tubeless with a trail casing. With an inner tube about 0.2 bar (2.9 psi) more, with an insert about 0.1 bar (1.5 psi) less. Stock tyres: Vittoria Mezcal | Tubeless | 2.35".
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.43 bar (21 psi) | 1.63 bar (24 psi) |
| 70 kg | 1.55 bar (22 psi) | 1.75 bar (25 psi) |
| 80 kg | 1.67 bar (24 psi) | 1.87 bar (27 psi) |
| 90 kg | 1.79 bar (26 psi) | 1.99 bar (29 psi) |
| 100 kg | 1.91 bar (28 psi) | 2.11 bar (31 psi) |
| 110 kg | 2.03 bar (29 psi) | 2.23 bar (32 psi) |
| 120 kg | 2.15 bar (31 psi) | 2.35 bar (34 psi) |
Air pressure in the fork and shock
The sticker on the fork (or on the shock) and the manufacturers’ setup charts give you a first pressure. Our calculator is more precise and suggests rebound too – always check the result via SAG.