Fantic Sierra: suspension setup & specs
The Fantic Sierra is an e-MTB for trail and touring with 160 mm of fork travel. It is powered by Bosch Performance Line CX Gen 5. Below you will find all 3 current builds with fork, plus SAG values in millimetres and a tyre pressure table.
Calculate the setup for your Fantic Sierra →
All builds
Fork, motor, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|
| Sport Sram | RockShox Psylo Silver RC (160 mm) | Bosch Performance Line CX Gen 5 800 Wh | – | €5,790 | Setup → |
| Race | RockShox Lyrik Select (160 mm) | Bosch Performance Line CX Gen 5 800 Wh | – | €7,490 | Setup → |
| Factory | RockShox Lyrik Ultimate (160 mm) | Bosch Performance Line CX Gen 5 800 Wh | – | €8,990 | Setup → |
How it compares
With 160 mm at the fork, the Fantic Sierra sits above average: across the 101 bikes in the “e-MTB for trail and touring” category in our database, the median is 150 mm. Among Fantic’s e-mountain bikes, the Fantic Sierra is the model with the most fork travel. The frame is made of carbon.
The starting price of €5,790 (Sport Sram) is roughly in line with the category median (€5,500). The top build, Factory, costs €8,990. Up front, all builds get a RockShox fork. In total, 3 different forks are used, from the RockShox Psylo Silver RC to the RockShox Lyrik Ultimate. It is powered by Bosch Performance Line CX Gen 5 with a 800 Wh battery.
Setup notes for this spec
- Air fork (RockShox Psylo Silver RC): the air valve is on top of the left leg under a cap. Change pressure in small steps (about 5 psi (0.34 bar)) and cycle the fork a few times afterwards so the air chambers can equalise.
- Rebound: turn the red RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- e-MTB: the extra weight mainly affects tyre pressure, which is why the table below already includes a surcharge. SAG is measured just as on a bike without a motor.
- Hardtail: only the fork needs setting up. With no rear suspension, rear tyre pressure is the key adjustment for comfort and grip.
Target SAG for the Fantic Sierra
SAG is the share of travel your weight already uses in the riding position. The table gives it straight in millimetres – read the O-ring on the stanchion and adjust the air pressure until it matches. Any figures from Fantic take priority.
160 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 27 mm |
| Trail | 20 % = 32 mm |
| Enduro / rough | 22 % = 35 mm |
| Bike park | 20 % = 32 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
The values apply to 2.60″ wide tubeless tyres with a trail casing, including the e-MTB surcharge. With an inner tube add about 0.2 bar (2.9 psi), with an insert take off about 0.1 bar (1.5 psi). Stock tyres: Maxxis Rekon 29x2,4; Maxxis Rekon 3C EXO 29x2,4.
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.40 bar (20 psi) | 1.60 bar (23 psi) |
| 70 kg | 1.52 bar (22 psi) | 1.72 bar (25 psi) |
| 80 kg | 1.64 bar (24 psi) | 1.84 bar (27 psi) |
| 90 kg | 1.76 bar (26 psi) | 1.96 bar (28 psi) |
| 100 kg | 1.88 bar (27 psi) | 2.08 bar (30 psi) |
| 110 kg | 2.00 bar (29 psi) | 2.20 bar (32 psi) |
| 120 kg | 2.12 bar (31 psi) | 2.32 bar (34 psi) |
Air pressure in the fork
The sticker on the fork 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.