Re: Ergon GP# grips Singletracks Mountain Bike News, Product Reviews, MTB Trails and Community › Protected: Forums › Mountain Bike Forum › Ergon GP# grips › Re: Ergon GP# grips June 4, 2013 at 12:01 #119602 Jampa56 I had great response from Ergon USA customer service. The bolt dimensions are M5x15mm. i am shickled titless.
