Step 1: Select the Diameter

Select the diameter that corresponds to your bicycle.

-- Select a diameter --30.9 mm31.6 mm

Step 2: Select the Distance

Now, choose the range that corresponds to your measurement.

-- Select a measurement range -- < 195 mm 7.5 - 9.1 inches 9.1–10.2 inches 10.3–11.4 inches 11.5–12.7 inches > 320 mm