The halo track rear hub is custom machined with the distinctive halo sweeping centre curved shape available in a number of great colours this is a great fixed gear hub for track riders specifications of the halo track rear hub fixedfreewheel or fixedfixed options choose from the drop down menu above japanese sealed bearings hollow axle with ti colour finish c clip on both sides of each sealed bearing hi polish custom cnc machined hub shell alloy flush fit bearing cover and end