AFFINITY CYCLES Gear Calculation Chart


¥2,871 ¥3,190

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AFFINITY CYCLES has created a gear calculation table that calculates the perfect gear ratio for riders driving single speed on trucks and streets.

Rotate the chart to select the size of the chainring. The window will display the answer for the ratio of chainrings and gears based on three different tire sizes.

Made of durable plastic made in the USA, it can withstand long-term use.



• Supports 19 types of chainrings (47-65t)
• 6 rear cogs (12-17t)
• 3 tire sizes
• Present a total of 342 formulas
• Inches and meters 

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