Spin the perfect gear ratio, on the track or in the streets. Reliable, accurate gear calculations for (700c wheel) track bikes. Most if not all gear calculation charts online, even in apps are NOT accurate. Affinity did the math and created a simple, easy to use chart which generates 100% accurate calculations. Rotate the chart to choose your chain ring size. The window displays the results of your chain ring & cog ratio based on 3 different tire sizes.
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*AFFINITY CYCLES* gear calculation chart
Original price was: $19.35.$5.80Current price is: $5.80.
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