Since 1992 this has been the frame that has made Rock Lobster's reputation for building long lasting responsive riding steel mountain bikes. The S.L. has a pair of gussets on the front end to help prevent collision damage and prolong the hard life of pounding dirt riding. Wishbone seatstay is a trademark feature of the frame along with a machined head tube and externally butted seat tube. This, along with all Rock Lobster M.T.B. frames can be built for any shock or rigid fork.