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What Are the Differences Between MH90-21 & 90/90-21 Sizes

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Old 04-09-2010, 03:25 PM
drspencer drspencer is offline
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Default What Are the Differences Between MH90-21 & 90/90-21 Sizes

I have a 2007 Softail Custom, stock tire size is MH90-21.

What are the differences between the NH90-21 and 90/90-21?

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Old 04-29-2010, 10:14 PM
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It's my understanding that the MH90 tire has a higher load rating than the 90/90. If you go to the manufacturers web site you should be able to find a chart listing their tires and weight ratings so you can confirm this for yourself.
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Old 05-01-2010, 10:18 AM
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MH90 is the same thing as 80/90. MJ90 is equivalent to 90/90. MM90 is 100/90. Just a different way to show the size.
The first number in 90/90 means approximately 90 centimeters wide, section width (they do vary, though). The second 90 means the sidewall height, bead to pavement, is 90% of the section width. So a 90/90 tire would be approx 90cm wide and 81cm from pavement to tire bead.

Last edited by mp; 05-01-2010 at 10:29 AM.
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