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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 500/14Cog: -
~=170mm: -
7-8sp InternalCog: SRAM S7: -
Shimano Nexus-7: -
Shimano Nexus Inter-8: -
Shimano Alfine-11: -
Nuvinci N360: -
Sturmey: -
Single-speed: -
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Classifieds

PBW

Wheels - This is the ONLY workshop of the year on wheels. It is a bit on the technical side: to satisfy the need for more knowledge.

How to build a wheel; true a wheel; make it round; calculate spoke lengths; smooth out bumps inside your drum brake. When can't a wheel be saved? Why are good spokes important? How and why to dish a wheel. How to make or true an unconventional (single-sided) wheel. Replacing wheel bearings.

Come with a thirst to learn.

Caffeine and morning snacks provided. Workshop starts when the caffeine kicks in. Cost: FREE

PBW

Come out and learn about adjusting your own shifting.

Enjoy beautiful, crisp shifting. Eliminate pesky trips to a bike shop to get rid of that clunking. Take charge of your handlebars. We'll show you how to do all this and more. Covering twist shifters, bar-ends, internally geared hubs, as needed.

Caffeine and morning snacks provided. Bring a shifting conundrum for our version of Stump the Chumps. Go for a ride on the beautiful American River Trail afterwards.

Where: 1114 C Street, Sac'to.
Cost: FREE

Come out and learn about chains.

When to lube and how. Lube options. How to measure the wear on your chain. How to open quick-links (power links). How to use a chain tool.

We'll show you how to do all this and more concentrating on conventional multi-speed bike chains.

Caffeine and morning snacks provided. Bring a chain conundrum for our version of Stump the Chumps. Go for a ride on the beautiful American River Trail afterwards.

Where: 1114 C Street, Sac'to.
Cost: FREE

PBW

Never fear going out again. Have confidence in your patch kit and your patching technique! Meet a goathead / puncture-vine and know your enemy. Morning snacks and caffeine provided. Workshop begins when the caffeine kicks in. Bring a flat tube to fix and tire conundrums and puzzles. Go for a ride on nearby American River Trail afterwards

PBW

Explore the elements of a tricycle drivetrain from the pedals through the cranks, chain, rear cog or cassette, and into the wheel.

Charlotte and Richard on a morning tandem-ride.
AlphaBENT offers the German-made Neodrive Z20S torque-based hub-motor electric-assist upgrade kit for Catrikes -- even those with 142mm through-axles. This elegant e-kit upgrades non-motorized Catrike recumbent trikes with a smooth, powerful motor built into the rear wheel. The intuitive system ihas a simple, comprehensive control / display that mounts efficiently onto a shifter.

A fire in the early morning of 5 June 2024 destroyed our neighbor business, MidCentury Sacramento. AlphaBENT escaped the worst of it and is back up and running.

Catrike introduces a new trike with a wider stance and higher seat and weight limit.

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