Shimano Cues FC-U4000-1 Crank Arms - 170mm - 40t - Black Mountain Bike and a 19mm adapter is

and a 19mm adapter is included

ERD: 388mm

it’s no surprise that the Classic helmets surpassed all EN and CPSC standards while being vigorously laboratory tested to the highest possible degree

Extensive real world and machine testing have proven this to be one strong stem

This stem is available in two lengths to fit your riding style or preference

Shimano Cues FC-U4000-1 Crank Arms - 170mm - 40t - Black Mountain Bike and a 19mm adapter isGrow your confidence riding hard over the rough stuff with this Shimano CUES FC U4000 1 crankset's wide range gearing and seamless pedaling. Works with Cues 9, 10 and 11 speed systems. Dynamic Chain Engagement+ special gear tip shape improves chain engagement and retention for smooth riding over rough terrain Durable and lightweight aluminum crank arms For frames with 68 73mm bottom bracket shells BB UN101 LL123 JIS Square taper bottom bracket