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dash_riprock

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Reply with quote  #1 
Hello Forum,
I am looking for new 26"x1.75" wheels for an old 1960's cruiser bike.  I measured the dropouts and it looks like the front axle was 5/16" diameter while the rear was 3/8" diameter.  Was it common to have different axle diameters between front and rear wheels?
Dash Riprock
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soup

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Reply with quote  #2 
Oh noes the dreaded imperial measurements. Go metric already. ;O)

Even now the 'standard' for axle sizes (QR [hollow axle]) are 9mm front 10mm rear. Outliers exist.
I feel axle size standards didn't exactly exist in the 'old days'.   So research would nedd to be done for each and every bike.
I wouldn't take drop out measurements as being an exact measure of the axle size

Seems to me (engineer's hat on ) that the rear axle has to be stronger(hence greater diameter) as it is dealing with drive forces and landing forces from jumps as well as bike+rider weight.

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