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Old 05-10-19, 01:29 PM
  #10  
fietsbob 
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seen added fittings to keep you from coming off, *
and rollers with drums that flare to the ends and have a concave shape to help keep you in the centre.


* inline skate wheels on roller frame at the ends of the front or + other rollers for example...







...

Last edited by fietsbob; 05-11-19 at 09:18 AM.
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