Shimano saint rear freehub center lock disc brake 135x10/12 mm thru axle 11-speed. With quick engagement, angular contact bearings, and quality sealing, the shimano saint freehub is perfect for all gravity mtb applications.Specifications:- Average weight: 347 (φ10) 333 (φ12)- Brake type: Center Lock disc brake- Rear speeds: 11/10/9/8- O.L.D. (mm): 135- Spoke hole 32H: Yes- Spoke hole 36H: Yes- External serration disc brake rotor lock ring With: Yes- Internal serration disc brake rotor lock ring Without: Yes- Axle fixing method: Thru- Thru axle (length x inner diameter ; mm)135 x 10: Yes- Thru axle (length x inner diameter ; mm)135 x 12: Yes- Flange distance (mm): 57.4- Offset (mm): 6.4- P.C.D. left / right (mm): 44/45- Flange diameter left / right (mm): 52.8/53.8- Spline type|HG spline M (10/9/8-speed, MTB 11-speed): Yes- Engagement type: Pawl ratchet- Quick engagement: X (more than 36 times/360 deg.)- Seal Hub: Labyrinth+Contact - Seal FREEHUB body: Contact- Internal grease sleeve: Yes