ACS MainDrive Integrated Headsets Size:1" (25.4MM) / 1-1/8" (28.6MM) Unique scalloped design of the

Unique scalloped design of the hub flanges effectively distributes stress - improving strength while reducing weight Rear Axle 12mm Thru x 148mm Cassette Body Type Shimano Micro Spline

1400 Defined Color Black

MR30 series TSR chainrings fit White Industries M/A/R/G 30mm spindle cranks only

DuraTx adds durability to pads and resists tearing/catching

ACS MainDrive Integrated Headsets Size:1" (25.4MM) / 1-1/8" (28.6MM) Unique scalloped design of theMainDrive Integrated Headsets feature CNC machined alloy tops with 45 45 degree sealed mechanism retainer bearings. Color Black, Red Bearing Type Cartridge Crown Race 26, 30 Defined Color Black, Red S. H. I. S Upper IS38, IS42 S. H. I. S. Stem Clamp Diameter 25. 4 Threadless, 28. 6 Threadless S. H. I. S Lower IS38, IS42