tire fit up issue Fuji road bike
01-11-22, 05:20 PM
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tire fit up issue Fuji road bike
I purchased a Kenda 24" x 1 3/8" tire for a UKAI 24" x 1 1/4" road rim. The tire was too small by a significant amount. I was able to fit a Kenda 27' tire on the UKAI 27" rear wheel.
Is this a matter of tire quality control?
Could this wheel need an ISO 547 tire vs. 540?
Is this a matter of tire quality control?
Could this wheel need an ISO 547 tire vs. 540?
Last edited by brewerkz; 01-11-22 at 05:28 PM.
01-11-22, 06:17 PM
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Most likely a 504/547 "misunderstanding". This is why better bike shops have a tire size chart on their computer's favorites list, to educate their customers and reduce the return rate of tires. One of the better sites to learn about tire sizes and how their labeling can be misleading to the uneducated is Sheldon Brown's Tire Sizing Systems (sheldonbrown.com) Andy
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01-12-22, 09:09 AM
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+1 with what Andrew said. It's always less confusing to use the ISO measurements as Sheldon explains in his article. Some rims will also include the ISO size printed/engraved on them somewhere.
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01-12-22, 09:47 AM
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Do you have the tire that was on the rim? It might have the ISO or ETRTO size on it somewhere. It'll probably be in some of the tiniest print embossed or stamped on the sidewall. Even tinier than the max inflation pressures.
Once you have that, you'll know the BSD (bead seat diameter) of both that tire the rim and any tire you should look for when making a new tire purchase for that rim.
Not sure if it applies in your case, but 1.38 and 1-3/8 are not the same size BSD in many other cases.
Once you have that, you'll know the BSD (bead seat diameter) of both that tire the rim and any tire you should look for when making a new tire purchase for that rim.
Not sure if it applies in your case, but 1.38 and 1-3/8 are not the same size BSD in many other cases.
01-12-22, 12:48 PM
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Product labels have nothing to do with math. What so many people are willing to think is that a label is also a specification. This is why ERTRO specs came about (and later ISO), to better describe what is and isn't interchangeable. Andy
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01-12-22, 04:10 PM
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I've been riding bikes with 406 front wheels for a long time and am fortunate to have never inadvertently bought a tire intended for a 451 rim. Sheldon's words have been helpful in avoiding that.
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01-13-22, 08:38 AM
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brewerkz Out of curiosity, your title says "Fuji Road Bike". What Fuji road bike has 24" wheels? Not saying it isn't so, but just not something I've seen.
01-13-22, 09:05 AM
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Back in the 1970s (and likely into the 80s) Fuji offered their Sports model in a 547 (24x1 1/4) wheel size for the kids. They also had a 597 (26x1/1/4) version. And, IIRC, they (like a few others) used the 547 size for their Terriocky ft wheel. Andy
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01-15-22, 03:19 AM
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https://archive.fujibikes.com/2017/Fuji/ace-247
