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Recumbent gearing calculator

Wheel diameterWheel size:
Front chainring(s): Crank length:
Front transmissionNone:
Schlumpf DriveMountain-Drive:     Speed-Drive:     HighSpeed-Drive:
Pinion gearboxP1.12:     P1.18:
Efneo GTRO (3-speed):
Rear cassetteCassette:
- 		Raw gear: -
~=170mm: -

SRAM 3x7 / Dual-Drive: -
~=170mm: -
14-sp Rohloff Speedhub 500/14 Cog: -
~=170mm: -
3x3 NINE Cog: -
~=170mm: -
7-8sp Internal Cog: SRAM S7: -
Shimano Nexus-7: -
Shimano Nexus Inter-8: -
Shimano Alfine-11: -
Nuvinci N360: -
Sturmey: -
Single-speed: -
© 2003-2024 Hugh Kern, All rights reserved.
Field-fix for broken ICE chain tube flex connectors

Field-fix for a broken flexible chaintube connector on an ICE trike.

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Catrike Dumont rollout schedule

Catrike expects to begin production of the Dumont in May 2016, but has not yet announced exact dates.

We'll keep you posted when we find out more.

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Compare weight: 500W Bionx v. 500W GoSwiss 26" wheel

We measured the naked weight of a 26" Bionx 500W wheel with a D500DV hub compared to the weight of a GoSwiss 500W wheel by HP Velotechnik. In spite of the appearance of more substance and weight, the Bionx wheel was significantly lighter than the GoSwiss wheel.

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ICE Sprint X RS-26 with 90mm drum brakes and 700c Bionx electric-assist

This is a custom build-up of an ICE Sprint X with a rear suspension, Bionx 350W electric-assist built into a 700c rear wheel, and 90mm Sturmey-Archer drum brakes.

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