Old 09-18-10, 11:00 PM
  #22  
Sixty Fiver
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As far as I know there has never been a tandem built with 100mm rear spacing and if the bike was originally fitted with a coaster hub as many low end bbft's are, the spacing should be 110mm and if it had a 3 speed the spacing should be 114mm.

5 speed spacing is 120mm, 6 speed and 7 speed road is 126mm, 8 -11 speed road and 7 speed mtb is 130mm, and then we get into real tandem spacing which was 140mm and now the standard is 145mm.

This is not to say that some tandems are built to use 135mm spacing (mine is built like this) and some have spacing of 160mm although this is something you will only find in a custom tandem or one of our expedition frames.

Narrower 135mm tandem spacings can be used when a bike is fitted with disc brakes as they do not need the same clearance as the old fashioned drum brakes do and modern rim brakes are also superior.
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