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Cable Travel Adapter Cribsheet
John Allen photo
by John "Ratios" Allen
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Adapter ratios

The table below gives cable travel ratios for adapters from JTek Engineering, and for the Problem Solvers Travel Agent. These adapters may be used in either direction, to increase or decrease cable travel. Note that the numbering of the Shiftmate adapters does not increase in the same order as the ratios.

 

Adapter Ratio Angle
Shiftmate #1, 1S 1.051 100°, straight
Shiftmate #2, 2S 1.108 100°, straight
Shiftmate #3, 3S 1.246 100°, straight
Shiftmate #4, 4S 1.199 100°, straight
Shiftmate #5, 5S 1.320 100°, straight
Shiftmate #6S 1.619 straight
Shiftmate #7S 1.338 straight
Travel Agent 1.911 90°

Applications

See the article on mixing and matching shifters, derailers and sprocket spacings on this site.

The article on adjusting direct-pull cantilever brakes on this site describes the use of the Travel Agent adapter.

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