Use this gearing calculator to figure out gear-inches for combinations of Pinion gearboxes, Schlumpf drives, Rohloff Speedhub, derailleur systems, and many internally geared hubs including SRAM 3x7 and Dual-Drive. Also, since gear-inches is not really a measure of mechanical advantage (thus, won't give indication of such for shorter or longer cranks), we provide a "normalized" gear-inches number, which indicates the effective mechanical advantage of the system in terms of standard 170mm cranks.
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Recumbent Tandem Rider #50 -- 2015 Summer
Issue #50 of Recumbent Tandem Rider Magazine is in the shop now. Features articles include:
- Bacchetta Giro 26 review
- Rolf Prima tandem wheels
- Nite Ize SpokeLit LED spoke wheel lights
- Touring California coast on Bacchetta recumbent bikes
- Tandem cycling review
- TATAR trike / recumbent tour of American River in Sacramento
- Cycle tourism stories
Come get your free copy in the shop, or subscribe online at RTR Magazine.