Kellys Theos AX: suspension setup & specs
The Kellys Theos AX is an e-enduro bike with 170 mm of fork travel and 160 mm at the rear. It is powered by AVINOX M2 or AVINOX M2S. Here you will find all 4 current builds with fork, shock and shock size, plus matching SAG and tyre pressure starting values.
Calculate the setup for your Kellys Theos AX →
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 |
|---|---|---|---|---|---|---|---|---|
| 20 29 800 Wh | RockShox Domain Gold R (170 mm) | RockShox Super Deluxe | 205x65 | 160 mm | AVINOX M2 800 Wh | – | – | Setup → |
| 40 29 800 Wh | RockShox Zeb Select (170 mm) | RockShox Super Deluxe | 205x65 | 160 mm | AVINOX M2 800 Wh | – | – | Setup → |
| 70 29 800 Wh | RockShox Zeb Select (170 mm) | RockShox Super Deluxe Select | 205x65 | 160 mm | AVINOX M2 800 Wh | – | – | Setup → |
| 90 29 800 Wh | RockShox Zeb Ultimate (170 mm) | RockShox Super Deluxe Select+ | 205x65 | 160 mm | AVINOX M2S 800 Wh | – | – | Setup → |
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 rear offers 160 mm, 10 mm less than the front. No other Kellys model among its e-mountain bikes has more travel up front. The frame is made of aluminium.
Kellys uses RockShox suspension throughout. The fork line-up ranges from the RockShox Domain Gold R to the RockShox Zeb Ultimate. It is powered by AVINOX M2 or AVINOX M2S with a 800 Wh battery.
Setup notes for this spec
- Air fork (RockShox Domain Gold R): 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): 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 Kellys Theos AX
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 Kellys take priority.
170 mm fork, 65.0 mm shock stroke (all builds)
| Riding style | Fork SAG | Shock SAG |
|---|---|---|
| XC / touring | 17 % = 29 mm | 24 % = 15.6 mm on the shock shaft |
| Trail | 20 % = 34 mm | 28 % = 18.2 mm on the shock shaft |
| Enduro / rough | 22 % = 37 mm | 30 % = 19.5 mm on the shock shaft |
| Bike park | 20 % = 34 mm | 27 % = 17.6 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: SCHWALBE Magic Mary Gravity Pro Radial 63-622 (29"x2.50) TLR, Ultra Soft, folding / SCHWALBE Magic Mary Trail Pro Radial 63-622 (29"x2.50) TLR, Soft, folding; SCHWALBE Magic Mary Trail 62-622 (29"x2.40) TLR, Soft, folding / SCHWALBE Romy Trail 62-622 (29"x2.40) TLR, Mid, folding; SCHWALBE Magic Mary Trail Pro Radial 62-622 (29"x2.40) TLR, Soft, folding / SCHWALBE Romy Trail 62-622 (29"x2.40) TLR, Mid, folding.
| 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
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.