What is up with tire sizing discrepancies?  RSS Feed

#1 2013-01-13 3:57pm

Axel10
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What is up with tire sizing discrepancies?

Last Summer I acquired two sets f Kenda K-Rad cruiser tires. Both sets of tires are 24x1.95.

The odd thing is that one set looked narrower than the second set.

The wider set came on a 2012 Haro cruiser, whilst the thinner set was purchased from a local cycling/sporting shop.

I finally got around to taking measurements the other day and here is what I found:

1) bought individually/ Kenda K-Rad 24x1.95 /@ 50PSI measures 56mm wide
2) came on Haro / Kenda K-Rad 24x1.95 /@ 50PSI measures 50mm wide

I am curious as to whether or not this discrepancy in tire sizing is common today, and/or was common BITD? What could account for it? Different factories maybe?

What I did was mix them up, and now I have two fat/skinny sets cool


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#2 2013-01-13 11:42pm

Axel10
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Re: What is up with tire sizing discrepancies?

Am I being a little OC on this? Be nice tongue

Last edited by Axel10 (2013-01-13 11:43pm)


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#3 2013-01-14 9:05am

butlerglc
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Re: What is up with tire sizing discrepancies?

I've seen that too.Not sure why?? Maybe misstamped? hmm

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#4 2013-01-14 9:29am

xtremevert
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Re: What is up with tire sizing discrepancies?

butlerglc wrote:

I've seen that too.Not sure why?? Maybe misstamped? hmm

yeah i would say a misstamping because sizing is sizing.  if they're not the same size, they're not the same size. plain and simple and even factories make mistakes sometimes.  although aren't the sizing numbers part of the mold???  hmm


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#5 2013-01-14 12:59pm

Axel10
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Re: What is up with tire sizing discrepancies?

I am beginning to suspect that this is not normal, and may be more to do with lack of quality control by Kenda.

The tires are identical, except that the smaller has K-905-005, and the bigger ones have K-905-003 stamped on them - all made in the PRC.

I have heard that in auto tires, sometimes the same model tires may differ in wear quality as a result of being made in different countries/factories. Could you imagine if sizing also played a factor depending on which factories these came out of?

Last edited by Axel10 (2013-01-14 12:59pm)


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#6 2013-01-15 10:35am

oldmetal
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Re: What is up with tire sizing discrepancies?

Maybe a new batch where they changed the specification, or their method of measuring?
Probably not relevant for BMX tires, but with MTB tires some manufacturers include the knobs on the tire when measuring the width and some don't.

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