Front Track hubs; Halo announces perhaps the finest track hubs out there. custom machined with the distinctive Halo sweeping centre curved shape. Â Top specification; Japanese sealed bearings. Hollow axle with Ti colour finish. C clip on both side of each sealed bearing. Hi-polish custom CNC machined hub shell, Alloy flush fit bearing cover and end capLaser logo.32HFront Dimensions; C-L 34mm C-R 34mmDiameter 62mm.Axle Thread 9x1.