hubs track double thread allen key lock .- fixed hub, MADISON CUSTON random customization process, a customization job based on a design that is carried out in an artistic and random way. These components are made from 71-millimeter round bars made of 6061 aluminum profile. The hub shells undergo four different machining processes before they are finished. As a result of our fixie track hubs, a double bright polished machining. With bearings with shielded and sealed ball bearings in 6000ZZ, which provides lightness and smoothness when turning. Openwork shafts at each end 30mm deep, 6 step bolt1 (thread) X25mm long, 5mm Allen head. Front: flange diameter 70 mm opening between tips 100mm. Rear flange diameter 70 mm, opening between sheaths 120mm, Thread of 35mm X 24 TPI for freewheels  For fixed, thread is 1.375 inch X 24 TPI chain line. Lock thread left ISO 33mm (1.299” pulgadas) x 28 tpi. .Also available threaded free

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