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Author Topic: Tyre question  (Read 508 times)

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Offline Grappa

Tyre question
« on: March 29, 2015, 06:33:07 pm »
Is there any difference between a 90/90 21" and a 3.00 - 21" tyre?
« Last Edit: April 03, 2015, 12:32:45 pm by Grappa »
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Offline Mad Matt

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Re: Tyre question
« Reply #1 on: May 16, 2015, 12:40:10 pm »
3.00-21 is an older inch size standard. +- 3 inches wide with 100 aspect ratio for 21 inch rim. A 90/90-21 is a low profile tire more than 3 inches wide, aspect ratio  90 (sidewall height % of width) for a 21 inch rim.

In other words the 90/90-21 is slightly wider with a lower profile for the same size rim
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Offline Grappa

Re: Tyre question
« Reply #2 on: May 18, 2015, 05:35:21 pm »
Many thanx for the info. Based on tyre size conversions I found on the interweb, these two sized tyres are interchangeable.
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