Bicycle hub:HG system.32/36 holes.6-bolt disc brake.135mm quick release,142mm thru-axle.2 sealed bearings on the front hub,4 sealed bearings on rear hub.Taiwan NBK 6 claws Bearing. All Aluminum Alloy CNC Precision Technology.around 900g/pair. HG system Freehub(adapter),Fit for more mtb road bike HG 8-11 speed cassette. Shimano 8-11S Compatible This BOLANY bike hub comes with 1pair quick release axle and 2pcs thru-axle endcaps.Whether your cassettte and fork is a quick release or a thru-axle, It can all be universal Appearance design, hub partial use of weight reduction design. Lightweight and high-strength aerospace-grade aluminum alloy material for lighter weight. Mainstream 6 claws design, full CNC Precision Technology process.Red and Black color Package includes: 1 pair BOLANY hub HG 32holes(Front and rear).1pair quick release skewer. 2pces Thru-Axle endcaps.When it starts working on your bike. You can hear a crisp, pleasant and dense clattering sound. Compared with other hubs. This quick release and thru-axle universal hub has a more harmonious and reasonable price. It is acceptable to most people. At the same time, it also has excellent quality and practicality.Our advice is that you check your cassette or fork or wheelset when you choose it. Make sure they are compatible with each other