Hope oval spiderless retainer ringhopes oval spiderless retainer ring is specifically designed for use with hopes own cranksets and opens up a wide range of tooth count options compared to the standard 4 bolt type its specifically tuned 12 ovality helps to smooth out your pedalling action and make those extended climbs to the top of the trails less painful also when youre on the way back down again youll enjoy excellent chain retention thanks to its narrowwide tooth profile when used