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Motorcycle Chain Length Calculator

MOTORCYCLE CHAIN LENGTH CALCULATOR

The following chart can be used as a guide to determine the length of chain you need for your gearing and wheelbase. You will need to determine the distance between the center of the output shaft (center of front spocket) and the center of the rear axle. Use the measurement on the left side of the chart. Then determine your rear spocket size. The point on the chart where these two cross will be your required chain length.

This chart can be used on 520, 525 or 530 pitch chains and is based off a 17 tooth front sprocket. If you have a larger sprocket, add 1 link of chain for every tooth. If you have a smaller front spocket, reduce 1 link of chain for every tooth.

 

Sprocket
Center to Center

                             

Rear 
Sprocket 

  38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
  21" 96 96 96 98 98 98 98 100 100 100 100 102 102 102 102
  22" 100 100 100 100 102 102 102 102 104 104 104 104 106 106 106
  23" 102 102 104 104 104 104 106 106 106 106 108 108 108 108 110
  24" 106 106 106 108 108 108 108 110 110 110 110 112 112 112 112
  25" 108 110 110 110 110 112 112 112 112 114 114 114 114 116 116
  26" 112 112 112 114 114 114 114 116 116 116 116 118 118 118 118
  27" 116 116 116 116 118 118 118 118 120 120 120 120 122 122 122
  28" 118 118 120 120 120 120 122 122 122 122 124 124 124 124 126
  29" 122 122 122 124 124 124 124 126 126 126 126 128 128 128 128
  30" 124 126 126 126 126 128 128 128 128 130 130 130 130 132 132
  31" 128 128 128 130 130 130 130 132 132 132 132 134 134 134 134
  32" 132 132 132 132 134 134 134 134 136 136 136 136 138 138 138
  33" 134 134 136 136 136 136 138 138 138 138 140 140 140 140 142
  34" 138 138 138 140 140 140 140 142 142 142 142 144 144 144 144
  35" 140 142 142 142 142 144 144 144 144 146 146 146 146 148 148
  36" 144 144 144 146 146 146 146 148 148 148 148 150 150 150 150
  37" 148 148 148 148 150 150 150 150 152 152 152 152 154 154 154
  38" 150 150 152 152 152 152 154 154 154 154 156 156 156 156 158
  39" 154 154 156 156 156 156 158 158 158 158 160 160 160 160 162
  40" 156 158 158 158 158 160 160 160 160 162 162 162 162 162 164
  41" 160 160 160 162 162 162 162 164 164 164 164 166 166 166 166
  42" 164 164 164 164 166 166 166 166 168 168 168 168 170 170 170
  43" 166 166 168 168 168 168 170 170 170 170 172 172 172 172 174
  44" 170  170 170 172 172 172 172 174 174 174 174 176 176 176 176
  45" 172 174 174 174 174 176 176 176 176 178 178 178 178 180 180
  46" 176 176 176 178 178 178 178 180 180 180 180 182 182 182 182
  47" 180 180 180 180 182 182 182 182 184 184 184 184 186 186 186
  48" 182 182 184 184 184 184 186 186 186 186 188 188 188 188 190
  49" 186 186 186 188 188 188 188 190 190 190 190 192 192 192 192
  50" 188 190 190 190 190 192 192 192 192 194 194 194 194 196 196
  51" 192 192 192 194 194 194 194 196 196 196 196 198 198 198 198
  52" 196 196 196 196 198 198 198 198 200 200 200 200 202 202 202
  53" 198 198 200 200 200 200 202 202 202 202 204 204 204 204 206
  54" 202 202 202 204 204 204 204 206 206 206 206 208 208 208 208
  55" 204 206 206 206 206 208 208 208 208 210 210 210 210 212 212
  56" 208 208 208 210 210 210 210 212 212 212 212 214 214 214 214