Spank spike race 33 bead bite mtb rimthe spike race 33 is designed for downhill racing where keeping the strength in a light rim can be difficult however this rim has the oohbah system implemented in its design making it one of the stiffest rims available on the market for a dh rim it is also one of the lightest and most durable the oohbah technology is a unique feature found on spank rims and wheels the central section of the rim is traditionally slightly curved or flat on most rims but