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Thread: Hoosier R7s size

  1. #26
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    I haven’t run the 245’s. They def won’t fit under my stock fenders on the 9.5’s. I could fit them if I bought 9 wheels. But I honestly don’t think they’ll be faster at that point. The 225 is really like a 255 and easily fit the nasa 266 tool that I need for tt4 class this year.
    @Shut_up_racing

  2. #27
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    The 245's fit on my 8.5's fine and pass the NASA 266 tool for TT4 too. I did need to roll the rear fenders pretty aggressively as well as clearance the inner fender a little.

    Wider tires are faster, even on smaller wheels. Period. Look up Vorshlags results on this, every time they went wider, they dropped substantial time.
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  3. #28
    Join Date
    Apr 2007
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    San Francisco, CA
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    95 M3 GTS2/ST
    Quote Originally Posted by Pat533i View Post
    I haven’t run the 245’s. They def won’t fit under my stock fenders on the 9.5’s. I could fit them if I bought 9 wheels. But I honestly don’t think they’ll be faster at that point. The 225 is really like a 255 and easily fit the nasa 266 tool that I need for tt4 class this year.
    Thanks Pat. I have run that 245 with a 9, 9.5 and 10 inch rim racing in ST4. With the new rules, cannot use my 9.5 or 10 inch rims with a 245. I would bet that the 225's on the 9.5's would have about the same grip as the 245 on a 9 as the 245 Hoosier bulges pretty extensively on the 9, wasting some tread. I would not run a 245 Hoosier on a 8.5 inch rim.

  4. #29
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    Quote Originally Posted by jonb94118 View Post
    Thanks Pat. I have run that 245 with a 9, 9.5 and 10 inch rim racing in ST4. With the new rules, cannot use my 9.5 or 10 inch rims with a 245. I would bet that the 225's on the 9.5's would have about the same grip as the 245 on a 9 as the 245 Hoosier bulges pretty extensively on the 9, wasting some tread. I would not run a 245 Hoosier on a 8.5 inch rim.
    Just another information point: I have run the 245 and 275/35 17 A7 and R7s for a year, with no issues, on an 8.5" wheel. The 275 bead is offset inwards from the sidewall, almost like designed in, like a cantilever slick.

    I'm forced to run 17x8.5s as the max width; the 245 and 275s are absolutely awesome on that 8.5" rim.
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  5. #30
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    That's wild. I have my 225/40/17s mounted up on 9" wheels and the tread is dead square on the wheel. Hoosier says their tread width is 9" so makes sense. I can't fathom a 275. I believe you though, maybe i'll try a 245 next time.
    COMSCC T70 E36 M3

  6. #31
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    Mar 2007
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    ithaca Ny
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    95m3/97m345/powerstroke

  7. #32
    Join Date
    Feb 2005
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    Astoria, NY
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    '99 M3
    Quote Originally Posted by Pat533i View Post
    It's comical how far offset the bead becomes from the rest of the tire. @2:03 it looks like it's ready to separate.

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