Thread: 13 speed cluster?
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Old 09-07-14, 10:07 PM
  #29  
Shimagnolo
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Originally Posted by Andrew R Stewart
A long time ago Shimano got a patent on a 14 cog set up. Used a single sided chain... Andy.
Check out the weird chain, and the weird upper RD pulley: Patent US5921881 - Narrow bicycle chain with inner links that receive sprocket teeth within a ... - Google Patents
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