Tires too big for the rims
08-16-17, 07:17 AM
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Tires too big for the rims
I have an old 1978 Schwinn metrocycle that I'm trying to fix up and the old tires I took off were 26 x1 1/4 tires I bought 26 x1 3/8. I tired to put the front tire on but the tire seems to big for the rim. Any ideas or though would be greatly appreciated thanks
08-16-17, 07:39 AM
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There are 3 sizes of 26 x 1 3/8 tires. You bought the ones for Raleighs and others. You need tires specifically made for Schwinn S-6 rims. Currently Kenda is the only one making them that I know of. Roger
08-16-17, 07:43 AM
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There are several 26" tire sizes. See this page:
Tire Sizing Systems
Are your tire sizes written in fractions as above, or decimals?
Look at the original tires, and see if you see a number written on the side: 559, 571, 584, 590, or 597, or 599?
You can also measure the diameter of your rim, and add about 10mm to estimate the ISO/BSD size.
Tire Sizing Systems
Are your tire sizes written in fractions as above, or decimals?
Look at the original tires, and see if you see a number written on the side: 559, 571, 584, 590, or 597, or 599?
You can also measure the diameter of your rim, and add about 10mm to estimate the ISO/BSD size.
08-16-17, 07:47 AM
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Agree.. best to use ETRTO numbers , those, metric are the diameter of tire bead seat ..
Since as you found there is more than 1 fractional tire size, so using that is ambiguous..
Since as you found there is more than 1 fractional tire size, so using that is ambiguous..
08-16-17, 07:59 AM
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These are the S-6 tires that Roger mentioned
https://www.biketiresdirect.com/prod...8x1-1-4-37-597
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Last edited by Darth Lefty; 08-16-17 at 08:06 AM.
08-16-17, 08:26 AM
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you'll probably want to be close to that. Suggestions given earlier in this thread.
08-16-17, 08:30 AM
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Actually a 26x1 3/8 tire at an ISO size of 590mm is smaller then the almost but not same Schwinn size 26x1 1/4 at 597mm. So the OP's statement " the old tires I took off were 26 x1 1/4 tires I bought 26 x1 3/8. I tired to put the front tire on but the tire seems to big for the rim." doesn't make sense. The 590 size won't fit on a 597 rim (or not without future removal challenges.. I've seen a number miss mounted and usually require the bead wires to be cut to remove). Andy.
08-16-17, 08:52 AM
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Is the tire too wide for the rim?
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08-16-17, 10:32 AM
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The weird thing is I got the back tire on perfectly. But with front I put the one side in then the inner tuber and working the other side in, every time I end up with this gap of too much tire. Honestly I started to wonder if I have the wrong size rim due to that the bike has damage that makes me think at one time it maybe had crash or something.
08-16-17, 11:37 AM
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Do the front and rear rims have the same outer diameter? It should just take a few seconds to measure them in either inches or mm, and convert.
08-16-17, 01:03 PM
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26X 1-3/8" are commonly found in 590mm & 597mm BSD's. (Schwinn is 597)
Sounds like you may have had a 597 rim replaced with a 590 and are trying a 597 tire.
7mm*PI is 22mm, or nearly an inch. (25.4mm)
Sounds like you may have had a 597 rim replaced with a 590 and are trying a 597 tire.
7mm*PI is 22mm, or nearly an inch. (25.4mm)
