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Use these charts to help decide what size Wolf Tooth chainring you need.

These gear charts are for comparing gearing with different front chainrings and rear cassettes for both 29 & 26 inch wheels. Note that a typical 26" fatbike wheel/tire and 650b Plus are very close to 29" diameter.

Numbers are "gear inches" but the actual value does not matter. Rather, it is the relative values than matter. The cassettes shown are 10 spd 11-36 & 11 spd 10-42 (horizontal, gray background). Front chainrings are shown covering a typical 1x or 2x setup (vertical, gray background)  These charts are helpful when deciding what size front sprocket to use with a new cassette or when changing from a 2x10 setup to a 1x10 or 1x11.
When selecting a chainring size, we recommend looking first at your lowest gear (smallest gear inches) and comparing that to what you are used to having. Next, look at the top speed available with your largest gear (biggest gear inches) and decide if this is fast enough. For a mountain bike off road, a top pedaling speed in the low 20s is usually more than enough. Max speed shown is assuming a cadence of 100. Also shown is the % change between gears in the cassette.


29 inch wheels



26 inch wheels


BCD Measurement Guide

Print this guide to determine the BCD on your existing chainring.  Make sure to check the option in the print settings to print "actual size" (or uncheck the "fit to page" option).  Put your existing chainring over the page and determine which bolt pattern on the page matches the bolt holes on your chainring.



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