Harden solid high flange track
Main Photo
Category:  Hubs
Name:  Harden solid high flange track
Brand:  Harden
Years:  1946 - 1954
Country:  England
Weight:  324.45 grams (avg)
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Added By: bikeville on 01/04/08
Updated By: peterbman on 10/31/16
Additional Photos - click for full size
Harden solid high flange trackHarden solid high flange trackHarden solid high flange trackHarden solid high flange track
Gear Compatibility Fixed GearFront Bearing Size/CountCartridge bearing
Rear Bearing Size/CountCartridge bearingRear Spacing
Spoke Drilling32; 40Flange SizeHigh Flange
Gear Threading/Pattern Body MarkingsHarden, a pillar of industry, Birmingham
Axle MaterialSteelShell MaterialAluminum
General Information
Called bacon slicers. Highly sought after because of their slick design. They have large, solid flanges that are rather thin. Used annular bearings.
The design has important features decades ahead of its time such as the freehub and use of annular race cartridge bearings.  The hubs were eye-wateringly expensive to buy.

The cartridge bearings were a standard industrial size, replaceable by heating the hub to expand it.   The rear bearing was regarded as too small for the job.

A detailed history of Harden and their various innovations and quirks is at

Spoke holes are quite close to the edge so a spoke cross producing close to 90degrees seems advisable.  The rear bearings of the day tended to fail early and were regarded as too small for the job.
The bearing sizes are specified in the above article. Can anyone advise if these are still easily available?

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Additional Resources
Resources:Reference & Charts
Brand Information(click to expand)
 Unlike most makers of the time period, Harden produced their hubs by machining aluminum alloy from a casting and were one of the first hub manufatures to extensively use sealed catridge bearings in their hubs.
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WeightSourceNotesAdded By
252 GramsUnknown JFischer
396.9 GramsSpec1949 freehub, no sprockets, Classiclighweights article. Simonius Titius
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