October 13, 2017

Profile’s Tech Tip #38:How To Measure The Q- Factor For Profile Race Cranks


This Q factor measurement is based off of the photo above: of a 19mm /68 mm bottom bracket shell with a euro outboard BB kit.


In order to measure your Q factor for Profile’s cranks, with a caliper, measure the distance between the outside of the pedal bosses in either inches or millimeters (see photo below). That number is your Q Factor.

If you have another size bottom bracket shell or different style bottom bracket bearing such as an Internal Euro, Spanish, Mid, or an American BB kit, it will not matter what style or size Profile or Madera cranks you have.

October 13, 2017


We are taking precautions to protect our employees and follow CDC and state guidelines. In the meantime, our machine shop is still running, we're here to assist you and we'll be shipping product to help support bike shops during this difficult time.