Developed by racers, embraced by everyone! The M315 competition shoe is a rugged, high performance shoe that also boasts the Shimano legacy of world class quality and performance. The M315 is the world's ultimate off-road power transfer technologies shoe.
Strengths: These shoes were very comfortable right after the "custom" fitting. They have been comfortable for 12 hr races and long trail rides, so I'm very pleased with the fit. The uppers look to be holding up really well but....
Weaknesses: The sole is wearing/cutting VERY rapidly. To the point I plan on contacting Shimano to see if they have a position on this problem. Hard to believe that mine is a unique problem.
Shimano's Custom Fit really works (I own their Custom Fit road shoes too). The issue with the soles is a huge problem. At this point I'll wait to hear back from Shimano.