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Kellys Theos RS15, P Titanium 29/27.5"+ 820 Wh

Model year: 2026 MountainTrail Electric bicycle Manufacturer page (opens in a new tab)
Price
Not published
Europe
€3,699 Last known price
Travel
150 / 140 mm Fork / rear shock
Wheels
29″ / 27.5″
Drivetrain
1 × 9 34t / 11–46t
Gear range
418%
Battery
820 Wh
Weight
24.1 kg 53.1 lb · Reference configuration not specified
Frame
Aluminum
Brakes
Hydraulic disc

Rider height by size (cm)

Size guide
  • SM 158–170
  • MD 168–179
  • LG 176–187

Components

19 of 25 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
  • Battery
  • Display
  • Motor

Sizes and geometry

3 sizes

Size explorer

Enter your height to highlight matching ranges.

Size Reported by the manufacturer

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
  • 24.1 kg
  • 53.1 lb

Suspension

Suspension configuration
  • Full suspension
Front travel
  • 150 mm
Rear travel
  • 140 mm

Drivetrain

Derived by Bikelake
Front chainrings
  • 1
Smallest chainring
  • 34
Largest chainring
  • 34
Rear sprockets
  • 9
Smallest sprocket
  • 11
Largest sprocket
  • 46
Lowest gear
  • 20.3 in
Highest gear
  • 85.0 in

Technical analysis

4 measures

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

Front travel

150 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

20.3 gear inches

This value is above 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

Gearing

Estimated speeds at 80 rpm

This bicycle

Lowest gear
7.8 km/h
Highest gear
32.6 km/h

Total gear range 418%

Pedaling rhythm
80rpm
40
60
80
100
120

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

Differences across 2026 builds
Specification This bicycle Kellys Theos RS15, P Titanium 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 24.1 kg Not informed Not informed Not informed Not informed Not informed
Suspension
Front travel 150 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 9 11 11 11 Not informed Not informed
Largest sprocket 46 50 50 50 50 50
Lowest gear 20.3 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
Tire width 2.35″ 2.4″ 2.4″ 2.4″ 2.4″ 2.4″
Wheel size 29″ / 27.5″ 29″ 29″ 29″ 29″ 29″

No exact THEOS RS15, P TITANIUM 29/27.5"+ 820 Wh publication is available for 2025.

Other models in this family

15 models

Published versions from the same family and model year.

Kellys Theos RS15, P Titanium 29/27.5"+ 820 Wh, by Kellys

This bicycle

E-bike, Trail

Theos RS15, P Titanium 29/27.5"+ 820 Wh

  • Weight: 24.1 kg
  • Suspension: 150/140 mm
  • Wheel size: 27.5″/29″

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