The sram omnium track 165mm 48t chainset the puristsrsquo choice for street and track performance the new omnium track crankset is the first external bearing track crank in the world designed for world class track racing but also at home as the ultimate ldquofixierdquo crankset the omnium features our strongest and stiffest alloy 7050 t6 the full 5mm thick 7075 t6 chainwheel was developed for use only with 12 x 18 chains reports from our test riders suggest that this is