Bulls Sonic EN-R: suspension setup & specs

Manufacturer data retrieved on 26 September 2026 · 3 builds · RRP €6,799 – €9,999 · Bike type: Full-suspension e-MTB

The Bulls Sonic EN-R is an e-enduro bike with 170 mm of fork travel and 160 mm at the rear. It is powered by Bosch Performance Line CX GEN5 (Smart System) 25/85 Nm or Bosch Performance Line CX-R (Smart System) 25/100 Nm. This page lists the 3 current builds with fork, shock and shock size and gives matching starting values for SAG and tyre pressure.

Calculate the setup for your Bulls Sonic EN-R →

All builds

Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: 27.5.

How it compares

170 mm at the fork almost exactly matches the 170 mm median of the 56 bikes in the “e-enduro bike” category in our database. The fork has 10 mm more travel than the rear end with 160 mm – a common layout that takes load off the front on steep terrain. No other Bulls model among its e-mountain bikes has more travel up front. Bulls builds the frame from carbon.

The lightest build, Team, weighs 22.3 kg according to Bulls – about 1.2 kg less than the category median (23.5 kg across 19 bikes with a stated weight). Within the range, weight varies by 1.1 kg. At €6,799 for the 1 build, pricing is typical for the category (median €6,900). The top build, Team, costs €9,999. Fork and shock come from RockShox on every build. The fork line-up ranges from the RockShox Domain Gold R 1.8 to the RockShox ZEB Ultimate. Drive comes from Bosch Performance Line CX GEN5 (Smart System) 25/85 Nm or Bosch Performance Line CX-R (Smart System) 25/100 Nm. Bulls specifies a maximum system weight of 125 kg. Subtracting roughly 24 kg for the bike leaves about 101 kg for rider, clothing, backpack and luggage.

Setup notes for this spec

• Fork (RockShox Domain Gold R 1.8): 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: on RockShox suspension the rebound adjuster is red. Always count clicks from fully closed (clockwise to the stop) so you can return to any setting.
• Air shock (RockShox Deluxe Select+ RL): 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: because of the extra weight, start with slightly more tyre pressure – the surcharge is already built into the table below.

Target SAG for the Bulls Sonic EN-R

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 on the shock shaft and adjust the air pressure until it matches. Any figures from Bulls take priority.

170 mm fork (all builds)

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: SCHWALBE Magic Marry Performance/ Big Betty Performance; SCHWALBE Tacky Chan EVO / Big Betty EVO.

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.

Sources

• Sonic EN-R 1
• Sonic EN-R 2
• Sonic EN-R Team

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