Running a 110 rear tire on 125 ok?

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8/12/2020 1:22 PM

So I have always ran a 100/90/19 on the rear of my 125s. Even with a 2.15 rim I still ran the smaller tire. Would it hurt to run the wider tire? The dealer I buy my tires from said don’t do it. He even gave me a reason why I can’t remember exactly what he said but it was something like it will mushroom out and cause problems in turns. The most recent mxa yz125 build they suggest to run the wide tire. So what is it no don’t do it or yea it’s a improvement?

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8/12/2020 1:39 PM

ecmx274 wrote:

So I have always ran a 100/90/19 on the rear of my 125s. Even with a 2.15 rim I still ran the smaller tire. Would it hurt to run the wider tire? The dealer I buy my tires from said don’t do it. He even gave me a reason why I can’t remember exactly what he said but it was something like it will mushroom out and cause problems in turns. The most recent mxa yz125 build they suggest to run the wide tire. So what is it no don’t do it or yea it’s a improvement?

Is that mxa YZ the same one where they gained 5hp on the dyno? For a bike that built I could see running a 110. On anything else I think you're losing power by adding more weight/drag to the bike... I realize that is an overly simplified explanation, but I believe that is the main reason for the standard 100 size on 125s.

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James

8/12/2020 2:45 PM

Damon Huffman used to run a 110 on his '94 RM125, and that was a Suzuki. grin grin

You can do it, but like mentioned above, the lighter weight of the 100/90 will spin more easily. If you can tell the difference between the two in the corners, you are far more sensitive than I.

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Braaapin' aint easy.

8/12/2020 2:54 PM

The Hoosier 110 is not much wider then the 100 and weighs less so thats an option too.

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