Latest update of the iconic race guard rear mudguard easy to fit single bolt adjustment fits any seat post with shims provided details new single bolt bracket version to fit adult mountain bikes with 26 wheels catches loose mud that gets flicked up from the rear wheel the original and the best rear mtb mudguard virtually indestructible stainless steel fittings fits seat pins from 254mm to 316mm dimensions mounting bracket 95mm mudguard 500mm bracket requires 25mm of seat post