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Difference in 26" Mountain Bike Rim and 26" cruiser rim?

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Difference in 26" Mountain Bike Rim and 26" cruiser rim?

Old 08-31-09, 09:39 PM
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jersey1
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Difference in 26" Mountain Bike Rim and 26" cruiser rim?

I recently purchased a new set of 26x1-3/8 tires for an old schwinn 3 speed rebuild. The rims I planned on using were from my old 26" mountain bike that previously had 26x2.10 tires, but there was a significant difference in the diameter size and they didn't fit. Any ideas why the diameters of tires both labeled 26" would be so different?
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Old 08-31-09, 10:13 PM
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http://www.sheldonbrown.com/tire-sizing.html


Take a read through there. Lots of sizes that sound compatible, but are not.
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Old 08-31-09, 10:51 PM
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fuzz2050
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26 X decimal = one thing
26X anything else =another thing entirely

I know it's confusing, and it seems like it doesn't make any sense, but one day after lots of practise, you'll learn it really just doesn't make any sense
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Old 08-31-09, 11:22 PM
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Look at the iso number and if everything matches, you're good to go. 26" rims/wheels/tires are all over the place in respect to size. ISO 559 is pretty much the 26" defacto standard, but always check.

For your 26X1-3/8", just buy a new rim...the Sun CR-18 (36H Part #: 626E27052605, 32H Part #: 626E10052605, and 40H Part #: 626E38052605) only costs about $30 or if you don't mind steel rims, Wheelmaster offers complete wheels (bolt-on's) for about $20 for the front, and $27 for the rear (price varies slightly depending on what hub you want - freewheel, coaster brake, etc), forgot the price of the rear with a SA 3-speed IGH...but you can look that up.
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Old 09-01-09, 05:50 AM
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Originally Posted by jersey1 View Post
Any ideas why the diameters of tires both labeled 26" would be so different?
There are eight different, non-interchangeable “26 inch” wheel sizes.

1) 26 x 1.25: bead seat diameter 599mm. Obsolete.
2) 26 x 1 ¼: bead seat diameter 597mm. Schwinn S6. Obsolete. Still made for very old Schwinn lightweights, but uncommon.
3) 26 x 1 3/8: bead seat diameter 590mm. Traditional “British three-speed” size. Also known as 650A. Obsolete for new bicycles in the USA, but very widely available in bike shops, hardware stores and big boxes – in America you can buy these tires in far more places than the industry standard 700Cs (bead seat diameter 622mm). Common in Japan where it is used on new bicycles, and common legacy size in the UK. This is also a common wheelchair tire size.
4) 26 x ?: bead seat diameter 587mm. Very obscure and obsolete proprietary size.
5) 26 x 1 ½: bead seat diameter 584mm. Also known as 650B. Obsolete, but a few companies are trying to revive this size for both road and mountain bikes with proprietary tires they provide.
6) 26 x 1 ¾: bead seat diameter 571mm. Known as 650C. Obsolete. In the USA these wide tires were used on old Schwinn middleweights. Tires are still made, but uncommon.
7) 26 x 1: bead seat diameter 571mm. Known as 650C as well, this narrow racing format is based on an obsolete Italian sew-up tire rim size. Used today on time trial and triathlon bikes.
8) 26 x 1.0 to 2.35: bead seat diameter 559mm. The ubiquitous mountain bike tire size, descended from the American balloon tires of over a half century ago. Now made in a huge array of widths and tread patterns. Widely available worldwide in widths of ~1 ¾ inches and greater; the narrower sizes are available in well-stocked bike shops. In the wheelchair world, this smallest 26-inch size is sometimes referred to as “25-inch”.

HTH,
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Old 09-01-09, 07:10 PM
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Hey Sci-Fi, any good web sites you could recommend for wheel purchases?
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Old 09-01-09, 08:00 PM
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Shipping costs are often a killer, so you have to shop around. Buying or ordering locally through your LBS...Alloy rims in 26x1-3/8" is going to be a long wait if the wholesaler doesn't have it in stock and the steel wheels pricing is going to be close to the online price including shipping cost, but you'll save the sales tax and get it within a few days. If you live close to the online stores, a local pickup can save you some cash.

For 26x1-3/8" "Alloy" rims, Bikeman...$28.99 and the shipping cost for one rim is $8 UPS
http://www.bikeman.com/RM8494.html

26x1-3/8" Wheel Master "steel rim" wheels, Amazon/Niagra Cycle Works:
Front: $19.19 + $11.49 shipping
http://www.amazon.com/Wheel-Master-F.../dp/B000AP0AI2
The listing:
http://www.amazon.com/gp/search/ref=...qid=1251855705
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Old 09-01-09, 08:09 PM
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You're awesome......thanks a bunch
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Old 09-02-09, 01:40 PM
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I'd bet that if you need tires to fit on original Schwinn rims, they will be the SPECIAL 26x1 3/8" Schwinn tire size. The one listed as 590 bead seat diameter in tcs' excellent post will not fit onto a Schwinn rim unless savagely forced to do so.
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