29 inch (nominal) 28 inch (nominal) 27 inch (nominal) 27.5 inch (nominal) 650B MTB(nominal) 26 inch (nominal) 700 X 56 / 56-622 / 29 inch 700 X 50 / 50-622 / 29 inch 700 X 44 / 44-622 / 29 inch 700 X 38 / 38-622 700 X 35 / 35-622 700 X 32 / 32-622 700 X 28 / 28-622 700 X 25 / 25-622 700 X 23 / 23-622 700 X 20 / 20-622 Tubular / Wide Tubular / Narrow 28 X 1 1/2 / 40-635 27 X 1 3/8 / 35-630 27 X 1 1/4 / 32-630 27 X 1 1/8 / 28-630 27 X 1 / 25-630 26 X 2.35 / 60-559 / MTB 26 X 2.125 / 54-559 / MTB 26 X 1.9 / 47-559 / MTB 26 X 1.5 / 38-559 / MTB 26 X 1.25 / 32-559 / MTB 26 X 1.0 / 25-559 / MTB 650 x 38b / 38-584 650B 650 x 28C / 28-571 / 26" road/tri 650 x 25C / 25-571 / 26" road/tri 650 x 23C / 23-571 / 26" road/tri 26 X 1 3/8 / 35-590 24 inch (nominal) 24 x 1 / 25-520 32-451 /20 x 1 3/8 28-451/20 x 1 1/8 20 X 1.75 / 44-406 / BMX 20 X 1.25 / 32-406 18 x 1.5 / 40-355 17 x 1 1/4 / 28-369 16 x 1 1/2 / 40-349 16 x 1 3/8 / 35-349 16 x 1.5 / 37-305 Ambi-Skidder
Control-Click (Command-Click on Macs) to choose multiple chainring and cog sizes
Chainring Size 20T 21T 22T 24T 26T 28T 30T 32T 33T 34T 35T 36T 37T 38T 39T 40T 41T 42T 43T 44T 45T 46T 47T 48T 49T 50T 51T 52T 53T
Cog Size 11T 12T 13T 14T 15T 16T 17T <18T 19T 20T 21T 22T 23T 24T 25T 26T 27T 28T 29T 30T 31T 32T 33T 34T 35T 36T = | Calculate