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Discussion Starter · #1 ·
Hi all
Can anyone tell me the overall height or call it outside diameter of both these 2 tires, can’t seem to find any info. I would think they are the same just on I’d a bit wider? I’m limited so space so looking for the smallest 19 tire hopefully close to 25” total
Thanks
 

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depends on what make tyre ya after, they are all a bit different, what ya fitting it to ?... if a harley narow fork a 90/90x19 fits right,.... 90mm wide, 90% of width in height (81mm) on rim X 19'' works out at 25.3'' overall height on my avon roadrider
 

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3.25 × 19 Avon Speedmaster is 24" dia.
3.50 Dunlop K70 is 26" dia.
These measurements are from a couple of my bikes...ought to be within 1/8". I hope that helps.
 

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A more modern tire than the K70 (and, I presume, other old-timey tires with stiff sidewalls/low psi recommendations) will probly have a lower profile.
 

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Discussion Starter · #5 ·
The Avon sounds real good to me again it’s a space thing, going onto my sidecar. I’d even consider a Duro or Chang again no info on those sizes as well.Thanks guys
 

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I have been told that you can go to manufacturer website and they have the specs for there tires. Never have tried it.
 

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Back when I started working on motorcycles I was told to add the rim size with the size of the sidewall x 2. Example: 4:00 x 18 18 + 8 is 26". 3:00 x 21 21 + 6 is 27". In your case the 3.50 x 19 would be 19 + 7 = 26" and the 3.25 X 19 will be 25.5". It is a ball park way of measuring but it works for most conventional type tires.
 

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Can't improve on Gary's post as a graphic example. Good one.
 
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