Shimano XTR FC M985 2x10 Crankset. There's a reason why Shimano's always at the top. This year they tore up that old book on race level mountain bike cranksets and came up with a seriously mind blowing reinvention We're talkin' Michael Jackson 1987 reinvention. This Shimano crankset features trail tuned gear ratios, so you get the right gears for your riding style, making it easier to maintain your cadence. The 4028T gear combination gives you gears that are ideal for screaming down fast lines and picking your way through tight, technical terrain no more hike a bike.