Fsa gossamer pro compact bb386evo chainseta true all round workhorse the compact edition of the mid range gossamer pro crankset is available with 4636 for cyclocross theres also a semi compact 5236 option cold forged 6061 aluminium crankarms with a monococque drive side arm and spider make for durable construction the bb386evo spindle can be fitted to a wide range of bikes for 2014 the gossamer pro has been redesigned with a new no pinch bolt design for the non drive side arm for an imp