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Old October 3rd, 2017, 08:52 PM   #15
isuoboe
ninjette.org member
 
Name: Kevin
Location: Central Iowa
Join Date: May 2012

Motorcycle(s): 1981 Honda CB125S, 2006 Ninja 250

Posts: 65
Tire sizes

I really appreciate all the input to my original post (Tire installation DIY).

I hesitate to use a different size than OEM. Is there any official/manufacturer recommendation of acceptable alternate sizes? What guidelines do any of you use to determine what alternate sizes (or specs) are OK?

On lists of tires that "fit" I see 90 instead of 80 aspect ratio; and P & H speed ratings instead of S. 90 might make my speedometer more accurate (at highway speeds it reads about 5 too high). P speed rating is 93; S is 112. While I'm not likely to ride 93, someone else might to see if the bike goes as fast as it's supposed to. (And I have read that the speed rating is for the tire when it is new; the owner's manual gives lower minimum tire depth for <80 than for >80.)

Thanks for your input.
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isuoboe
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