Will a Fat Bike fit a HighSpeed? Dave Updated June 13, 2018 20:02 Follow Yes the HighSpeed - Fits up to 5", also fit most Thru Axles out of the box Other mounts that will work are; ForKChop - Fits up to 5", also fits most Thru Axles out of the box HighRoad will fit a tire up to to a 3.25" Related articles Is the Yakima Raptor / Raptor Aero OK for use on a Carbon Fiber Frame? Lost Keys How can I find Replacement Parts? What size Axles will the HighSpeed Fit? What skewer do I need? Comments 0 comments Please sign in to leave a comment.