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Discussion Starter · #1 ·
Back again fellas. So since im not the best at reading tire sizes on my front tire....idk what the (mh) in...MH90/21 is. Ik that it is the "Alpha" size...which is supposedly the same as 80/90-21. But I do not see 80/90-21 tires anywhere. The smallest ive seen is 90/90-21...(which is the tire I want!).....Can anyone tell me is a 90/90-21 will fit on my MH90/21? I have the 21in front rim on my 2005 sportster 1200C. Thank as always everyone!!! For reference I am wanting the.....

Shinko 777 90/90-21 Wide Whitewall Front Tire | 105-495 | J&P Cycles

For the front
 

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idk what the (mh) in...MH90/21 is.
M = Motorcycle
H = Width


MH = 80
MJ = 90
MM = 100
MN =110
MR = 120
MT = 130

These all have a sidewall aspect ratio of 90% of tire width.... ie 80/90-21.
 

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Discussion Starter · #4 ·
I know that it means 80...do you mean see how much more space I have between the tire and the fender mount?
 

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I know that it means 80...do you mean see how much more space I have between the tire and the fender mount?
MH would be 80mm wide, and since the aspect ratio is 90%, it would be 80mm x .9 or 72mm tall.

A MJ tire would be 90mm wide and 90mm x .9 or 81mm tall.
 
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