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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  20 x 1 3/4 size tyres. Now they don't fit normal rims do they......
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Author Topic: 20 x 1 3/4 size tyres. Now they don't fit normal rims do they......  (Read 601 times)

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mark 2

  • Guest
Just tried some real os chunk Carlise Aggressor tyres on regualr Ukai Speedline rims. Tyres were about 2cm too big. Size on the side says 20 x 1 3/4  , not the usual 1.75.  Knew that when I bought them, should have realised really from having a few mini bikes.  I'm guessing then its some imperial / metric (?)   fractional / decimal  standardisation thing, like skinny tyres being 1 1/8 or 3/8 and them being a bit bigger in circumference than 1.75's etc.

So what bmx rims are they for?  Saying Schwinn on link below

Anyone know much about this stuff?  Stidds........?


Here's some info....


http://sheldonbrown.com/tire-sizing.html


Back to the drawing board....

Offline jT Racing

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toys19

  • Guest
rim size doesnt define wheel diameter, its the rolling dia of the tyre, thats why 1 3/8th rims are actually bigger than normal rims...



Offline Jt

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soak em in petrol and put em round the next person who pisses you off's neck...then light them :daumenhoch:

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  20 x 1 3/4 size tyres. Now they don't fit normal rims do they......
 

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