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Old 06-24-07, 08:03 AM   #1
medusa
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Tire size wrong?!

As a newbie rejoining the ranks of bicyclists after many years I am taking baby steps. I am very puzzled though over one think. I bought a used Hercules 3 speed bike. I decided to buy new tire and tubes and I looked at the size of the tires that were already on the bike. The size noted was 26 1 3/8. I order the new tires in that size and when I tried to place them they looked way too big. what could have possibly gone wrong??
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Old 06-24-07, 10:31 AM   #2
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26 X 1 3/8 is not the same as 26 X 1.375. See http://www.sheldonbrown.com/tire-sizing.html
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Old 06-24-07, 10:41 AM   #3
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There is the schwinn 26" 1 3/8 which is bigger then the huffy..... bikes that also took a 26" 1 3/8 tire. You may have bought somw schwinn sized tire's.
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Old 06-24-07, 02:00 PM   #4
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Look at the Metric sizing on the tires.
There are 2 different sized 26x1-3/8" tires.
590 MM & 597 MM.
If you confused 1-3/8" with 1.375", it's going to be WAY OFF. "Decimel" sized 26" tires are used on a 559 MM rim.
http://sheldonbrown.com/tire-sizing.html
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Old 06-24-07, 02:13 PM   #5
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The OP said that the replacement tyre was too big? MTB sized tyres in 559mm bead would actually be too small. Bigger than 26x1-3/8" would be something like 27x1-3/8" ??? What's the size printed on the side of the new tyre?
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Old 06-24-07, 02:21 PM   #6
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Quote:
Originally Posted by DannoXYZ
The OP said that the replacement tyre was too big? MTB sized tyres in 559mm bead would actually be too small. Bigger than 26x1-3/8" would be something like 27x1-3/8" ??? What's the size printed on the side of the new tyre?
This is probably Schwinn's fault.

The traditional 26 x 1 3/8" size, used on most English 3-speeds is 590 mm.

For reasons not clear, back in the '60s Schwinn started using the 597 mm size and _calling_ it 26 x 1 3/8"!

This idiocy has wasted uncountable person hours over the years. If the tire says "Schwinn" or "S-[digit]" on it, it will be the 597 mm size, properly known in the English system as 26 x 1 1/4".

My guess is that the O.P. got stuck with a 597 mm tire.

http://harriscyclery.com/590

O.P.: See also http://sheldonbrown.com/english for lotsa info about bikes like yours.

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