Officially yes these are sent as 10mmDrill 5 mins will make a ok for 14mm axlesI’m running a frame (S&M credence) without internal chain tensioner inside the drop outs.As much as I don’t like having to use add on tensioners like these, it’s better than over tightening a wheel bolt just to keep the wheel straight. Especially profile minis.So with some minor enhancements these are awesome




