Kellys Theos RS30, P 29/27.5" 820 Wh

Name: Kellys Theos RS30, P 29/27.5" 820 Wh
Brand: Kellys

2026 MountainTrail Electric bicycle Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €4,199 Last known price
Travel: 160 / 140 mm Fork / rear shock
Wheels: 29″ / 27.5″
Drivetrain: 1 × 11 34t / 11–50t
Gear range: 455%
Battery: 820 Wh
Weight: 23.9 kg 52.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

20 of 24 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

KELLYS THEOS RS-series - Superlight design, advanced robotic welded Al 6061-T6 / Designed & manufactured in EUROPE / Think Link® suspension system, 140 mm rear travel, integrated removable battery, 1.8" tapered HT, post mount 203 mm, mullet 29 / 27.5"+ wheelset, 12x148 mm Boost thru axle Not identified

Electric system

3 parts

Suspension

2 parts

Drivetrain

5 parts

Cassette
- Shimano CS-LG400-11 11 speeds 11–50t
CS-LG400-11
Chain
- Shimano CN-LG500
CN-LG500
Crankset

MIRANDA Miranda (34T) - length 170 mm Not identified
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000-11R 11 speeds
SL-U6000-11R

Brakes

3 parts

Brake levers
- Shimano Deore BL-M4100
BL-M4100
Brakes
- Shimano BR-MT420
BR-MT420
Disc rotors

GALFER Fixed Disc Wave® DB034W Center Lock, 203 mm front / 203 mm rear Not identified

Wheels and tires

5 parts

Front hub
- Shimano HB-TC500-15-B
HB-TC500-15
Rear hub
- Shimano FH-TC500-HM-B 11 speeds
FH-TC500-HM
Rims
- KLS
Spokes

stainless steel black Not identified
Tires
- Schwalbe Nobby Nic

Cockpit and contact points

5 parts

Grips
- KLS
Handlebar
- KLS
Saddle
- KLS
Seatpost
- Limotec
Stem
- KLS

Sizes and geometry

2 sizes

Rider-height ranges are not published for these sizes.

Size

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 23.9 kg

52.7 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 18.7 in
Highest gear: 85.0 in

Wheels and brakes

Wheel configuration: Different sizes
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Electric system

Battery capacity: 820 Wh

Additional specifications

Battery: KELLYS K2 AMXXPRO CARBON 820 Wh - superhigh energy density 236 Wh/kg, weight 3.48 kg, capacity 23 Ah, co-developed by KELLYS-BMZ
Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″, 27.5″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

160 mm

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,644 bicycles with this information
Coverage: 96.3% of the class

Lowest gear

18.7 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,229 bicycles with this information
Coverage: 72.0% of the class

Highest gear

85.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,229 bicycles with this information
Coverage: 72.0% of the class

Shifting

Mechanical

389 of 1,706 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,706 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 32.6 km/h

Total gear range 455%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.7–85.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2026
Lowest gear: 1229 bicycles with this information, 72.0% of the class
Highest gear: 1229 bicycles with this information, 72.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Kellys Theos RS30, P 29/27.5" 820 Wh	Kellys Theos AX20, Desert Brown 29" 800 Wh	Kellys Theos AX20, Magic Hydra 29" 800 Wh	Kellys Theos AX20, Magic ICE 29" 800 Wh	Kellys Theos AX40, Arctic 29" 800 Wh	Kellys Theos AX40, Ruthenium 29" 800 Wh
Frame
Bicycle weight	23.9 kg	Not informed	Not informed	Not informed	Not informed	Not informed
Suspension
Front travel	160 mm	170 mm	170 mm	170 mm	170 mm	170 mm
Rear travel	140 mm	160 mm	160 mm	160 mm	160 mm	160 mm
Drivetrain
Rear sprockets	11	11	11	11	Not informed	Not informed
Lowest gear	18.7 in	19.7 in	19.7 in	19.7 in	19.7 in	19.7 in
Highest gear	85.0 in	89.6 in	89.6 in	89.6 in	89.6 in	89.6 in
Wheels
Wheel configuration	Different sizes	Same size	Same size	Same size	Same size	Same size
Electric bicycle systems
Battery capacity	820 Wh	800 Wh	800 Wh	800 Wh	800 Wh	800 Wh
Other specifications
Wheel size	29″ / 27.5″	29″	29″	29″	29″	29″