Bulls Sonic EVA AM SX: suspension setup & specs
The Bulls Sonic EVA AM SX is an e-MTB for trail and touring with 140 mm of fork travel and 130 mm at the rear. It is powered by Bosch Performance Line SX 25/55Nm. Below you will find all 1 current builds with fork, shock and shock size, plus SAG values in millimetres and a tyre pressure table.
Calculate the setup for your Bulls Sonic EVA AM SX →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Shock | Shock size | Rear travel | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|---|
| 1 | BULLS Lytro 34 SL LOR Air DS Boost (140 mm) | SR Suntour Edge Plus 2CR | – | 130 mm | Bosch Performance Line SX 25/55Nm | 19.9 kg | €5,999 | Setup → |
How it compares
With 140 mm of fork travel, the Bulls Sonic EVA AM SX is on the shorter side; the median of the 101 comparable bikes in the “e-MTB for trail and touring” category is 150 mm. The fork has 10 mm more travel than the rear end with 130 mm – a common layout that takes load off the front on steep terrain. Within Bulls’s e-mountain bikes, it sits between the Bulls Sonic SX and the Bulls Sonic AM on travel. Bulls builds the frame from carbon.
The lightest build, 1, weighs 19.9 kg according to Bulls – about 3.5 kg less than the category median (23.4 kg across 49 bikes with a stated weight). The starting price of €5,999 (1) is roughly in line with the category median (€5,500). It is powered by Bosch Performance Line SX 25/55Nm. Worth knowing for heavier riders: the maximum system weight is 130 kg – after about 20 kg of bike, that leaves around 110 kg including kit.
Setup notes for this spec
- Air shock (SR Suntour Edge Plus 2CR): measure SAG in your riding position, ideally with a helper holding the bike. Cycle the shock a few times after every pressure change.
- 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.
Target SAG for the Bulls Sonic EVA AM SX
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 Bulls specifies its own target SAG for your model, that takes priority.
140 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 24 mm |
| Trail | 20 % = 28 mm |
| Enduro / rough | 22 % = 31 mm |
| Bike park | 20 % = 28 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
Basis: 2.60″ tyre width, tubeless, trail casing, including the e-MTB surcharge. If you run tubes, add about 0.2 bar (2.9 psi); with an insert, about 0.1 bar (1.5 psi) less is enough. Stock tyres: SCHWALBE Wicked Will Performance/Nobby Nic Performance.
| 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 and shock
You will find a suitable starting pressure on the sticker on the fork stanchion (or on the shock) or in the suspension manufacturers’ setup charts. Our calculator gives you a starting value including rebound for your weight and riding style. What matters afterwards is the measured SAG from the table above.