Old 09-08-16 | 08:55 AM
  #6  
fietsbob
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Joined: Jun 2010
Posts: 43,587
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From: NW,Oregon Coast

Bikes: 8

There are 4.. 349 is a High pressure performance 16". 305 , rim smaller tire wider ..

451 and 406 are the 2 in 20".. 406 is the most common as its the BMX bike size..

A 349 - 32 (Schwabe Kojack) at 100+ psi , if its slow the rider is just slacking.


Measured difference is the circumference, so for a measured mile the number of times a 20" wheel
will rotate, vs A 16" wheel can be calculated..






./.

Last edited by fietsbob; 09-08-16 at 10:24 AM.
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