Zipp Track disc
http://www.ebay.co.uk/itm/Zipp-1050-disc-wheel-/110849950982?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item19cf2c0506#ht_500wt_1216
@C.B. started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Zipp Track disc
http://www.ebay.co.uk/itm/Zipp-1050-disc-wheel-/110849950982?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item19cf2c0506#ht_500wt_1216