diyarts bicycle hub 1 pair 2 versions 4 bearings 32 holes 72 rings aluminum alloy quick release mountain bike hub (gold ba) diyarts <strong>specification:</strong><br> material: al6061 aluminum alloy body al7075 shaft core tower<br> number of holes: 32 holes<br> taki: support shimano 8-9-10 speed<br> quick release version: front width 100mmx9mm, rear width 135mmx10mm<br> barrel axis version: front width 100mmx15mm, rear width 142mmx12mm<br> number of rings: 72 rings<br> color optional: red / gold / blue / titanium / black<br> weight: 220 grams of front axle, 300 grams of rear axle, 120 grams before and after quick release<br> <br> <strong>package included:</strong><br> 1 pair * mountain bike hub