Transition Regulator SX: suspension setup & specs
The Transition Regulator SX is an e-MTB for trail and touring with 160 mm of fork travel and 150 mm at the rear. It is powered by Bosch Performance Line SX. Here you will find all 1 current builds with fork, shock and shock size, plus matching SAG and tyre pressure starting values.
Calculate the setup for your Transition Regulator 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: MX.
| Build | Fork | Shock | Shock size | Rear travel | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|---|
| Eagle 90 | RockShox Lyrik Ultimate (160 mm) | RockShox Super Deluxe Ultimate | 205x60 | 150 mm | Bosch Performance Line SX 400 Wh | – | – | Setup → |
How it compares
Up front the Transition Regulator SX runs 160 mm – 10 mm more than the 150 mm median we calculated from 101 bikes in the “e-MTB for trail and touring” category. The rear offers 150 mm, 10 mm less than the front. Among Transition’s e-mountain bikes, the Transition Regulator SX has the shortest fork travel. The frame is made of carbon.
Transition uses RockShox suspension throughout. It is powered by Bosch Performance Line SX with a 400 Wh battery.
Setup notes for this spec
- Air fork (RockShox Lyrik Ultimate): 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.
- Shock (RockShox Super Deluxe Ultimate): 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.
- 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 Transition Regulator 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 Transition specifies its own target SAG for your model, that takes priority.
160 mm fork, 60.0 mm shock stroke (all builds)
| Riding style | Fork SAG | Shock SAG |
|---|---|---|
| XC / touring | 17 % = 27 mm | 24 % = 14.4 mm on the shock shaft |
| Trail | 20 % = 32 mm | 28 % = 16.8 mm on the shock shaft |
| Enduro / rough | 22 % = 35 mm | 30 % = 18.0 mm on the shock shaft |
| Bike park | 20 % = 32 mm | 27 % = 16.2 mm on the shock shaft |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
Basis: 2.50″ 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: Maxxis Assegai 3C MaxxGrip EXO+ (2.5) / Maxxis Minion DHRII 3C MaxxTerra EXO+ (2.4).
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.48 bar (21 psi) | 1.68 bar (24 psi) |
| 70 kg | 1.60 bar (23 psi) | 1.80 bar (26 psi) |
| 80 kg | 1.72 bar (25 psi) | 1.92 bar (28 psi) |
| 90 kg | 1.84 bar (27 psi) | 2.04 bar (30 psi) |
| 100 kg | 1.96 bar (28 psi) | 2.16 bar (31 psi) |
| 110 kg | 2.08 bar (30 psi) | 2.28 bar (33 psi) |
| 120 kg | 2.20 bar (32 psi) | 2.40 bar (35 psi) |
Air pressure in the fork and shock
You will find a guide value for air pressure on the fork sticker (or on the shock) or in the suspension makers’ charts. Our calculator also takes riding style and rebound into account. In the end, measured SAG is what counts.