Kellys Theos RS: suspension setup & specs

Manufacturer data retrieved on 27 September 2026 · 5 builds · Bike type: Full-suspension e-MTB

The Kellys Theos RS is an e-MTB for trail and touring with 160 mm of fork travel and 140 mm at the rear. It is powered by PANASONIC GXM AMXXPRO. Below you will find all 5 current builds with fork, shock and shock size, plus SAG values in millimetres and a tyre pressure table.

Calculate the setup for your Kellys Theos RS →

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
30 P MX 820 Wh	RockShox Psylo Silver RC (160 mm)	RockShox Deluxe Select	210x55	140 mm	PANASONIC GXM AMXXPRO 820 Wh	23.9 kg	–	Setup →
30 P MX 900 Wh	RockShox Psylo Silver RC (160 mm)	RockShox Deluxe Select	210x55	140 mm	PANASONIC GXM AMXXPRO 900 Wh	23.9 kg	–	Setup →
50 P MX 820 Wh	RockShox Zeb Select (160 mm)	RockShox Super Deluxe	210x55	140 mm	PANASONIC GXM AMXXPRO 820 Wh	24.8 kg	–	Setup →
50 P MX 900 Wh	RockShox Zeb Select (160 mm)	RockShox Super Deluxe	210x55	140 mm	PANASONIC GXM AMXXPRO 900 Wh	24.8 kg	–	Setup →
90 P MX 900 Wh	RockShox Lyrik Select (160 mm)	RockShox Super Deluxe	210x55	140 mm	PANASONIC GXM AMXXPRO 900 Wh	23.0 kg	–	Setup →

How it compares

Up front the Kellys Theos RS 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 fork has 20 mm more travel than the rear end with 140 mm – a common layout that takes load off the front on steep terrain. Within Kellys’s e-mountain bikes, it sits between the Kellys Theos F and the Kellys Theos AX on travel. Kellys builds the frame from aluminium.

At 23.0 kg (90 P MX 900 Wh build), the weight is close to the category median of 23.4 kg. There are 1.8 kg between the lightest and the heaviest build. Fork and shock come from RockShox on every build. The fork line-up ranges from the RockShox Psylo Silver RC to the RockShox Lyrik Select. Drive comes from PANASONIC GXM AMXXPRO, paired with 820–900 Wh of battery capacity.

Setup notes for this spec

Fork (RockShox Psylo Silver RC): 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): 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 Kellys Theos RS

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 Kellys specifies its own target SAG for your model, that takes priority.

160 mm fork, 55.0 mm shock stroke (all builds)

Riding style	Fork SAG	Shock SAG
XC / touring	17 % = 27 mm	24 % = 13.2 mm on the shock shaft
Trail	20 % = 32 mm	28 % = 15.4 mm on the shock shaft
Enduro / rough	22 % = 35 mm	30 % = 16.5 mm on the shock shaft
Bike park	20 % = 32 mm	27 % = 14.9 mm on the shock shaft

How to measure SAG is explained in our guide SAG setup.

Tyre pressure starting values

For 2.40″ wide tyres, tubeless with a trail casing, including the e-MTB surcharge. With an inner tube about 0.2 bar (2.9 psi) more, with an insert about 0.1 bar (1.5 psi) less. Stock tyres: SCHWALBE Albert Evo Trail Pro 63-622 (29"x2.50) TLR, ADDIX Ultra Soft, folding / SCHWALBE Albert Evo Trail Pro 63-584 (27.5"x2.50) TLR, ADDIX Soft, folding; SCHWALBE Magic Mary Evo Super Trail 62-622 (29"x2.40) TLE, ADDIX Ultra Soft, folding / SCHWALBE Big Betty Evo Super Trail 65-584 (27.5"x2.60) TLE, ADDIX Soft, folding; SCHWALBE Nobby Nic Performance 62-622 (29"x2.40) ADDIX, folding / SCHWALBE Nobby Nic Performance 65-584 (27.5"x2.60) ADDIX, 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

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.

Note: all values without guarantee. Specification can vary by model year, frame size and market – if in doubt, the type plate, the manual and Kellys’s information apply. Never exceed maximum pressures.