15/9 wheels ,what tyres
12-31-2009, 12:31 PM
#26
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Re: 15/9 wheels ,what tyres
And what racers do and make work, does not always correspond to the manufacturer's recommendations. The latter has to allow for large safety margins and a wide range of applications, while the racer/enthusiast cares about one thing: going faster in his car, in his situation. So racers often will "over tire" or "under tire" a rim, depending on rules and actual performance data.
If the safety card is to be played, then one needs to look at all of the other typical enthusiast mods that are beng made by H-T'ers like out-of-spec alignment, lowered ride heights, etc., all of which compromise the designed-in safety of the car (bumper heights, anyone?). Liability being what it is in this country, you'll never get tacit approval for that sort of thing from a manufacturer.
That said, if you do use a tire/rim combination that falls outside of the manufacturer's recommendations, you need to do so with eyes wide open and know that you do take some risk, and can't be blaming the tire-maker for anything that goes wrong.
--Andy
If the safety card is to be played, then one needs to look at all of the other typical enthusiast mods that are beng made by H-T'ers like out-of-spec alignment, lowered ride heights, etc., all of which compromise the designed-in safety of the car (bumper heights, anyone?). Liability being what it is in this country, you'll never get tacit approval for that sort of thing from a manufacturer.
That said, if you do use a tire/rim combination that falls outside of the manufacturer's recommendations, you need to do so with eyes wide open and know that you do take some risk, and can't be blaming the tire-maker for anything that goes wrong.
--Andy
For example, one would expect that R compound tires are designed with the extreme friction and temperatures generated on the racetrack, and that any specs take that into consideration. That's why you have bulletins like Toyo's "don't store the R comps below freezing", which would be a problem for street tires but not for track tires.
And I absolutely agree with that last paragraph. You don't have to do what anybody says you should or shouldn't do (aside from matters of legality or competition rules). I post information under the philosophy that everyone should get as much good information as you can, and then make your own decisions based on what you think is best.
12-31-2009, 02:01 PM
#27
Re: 15/9 wheels ,what tyres
which are more like a 245 toyo.
the ra-1's that i used on your stupid *** wheels, cleared just fine
12-31-2009, 06:13 PM
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Re: 15/9 wheels ,what tyres
I had the same problem with the Kumho V710s. Maybe Toyos are just super narrow? And the UCA clearance was the inside of the wheel, not the tire.
01-01-2010, 08:33 AM
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01-01-2010, 02:07 PM
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Re: 15/9 wheels ,what tyres
Correct. Which is why I'm confused as to why no one else seems to have that problem...
There was also a rubbing issue on the trailing arm though, similar to what one of these guys described as "shining it up", which is what Sander was referring to, and what I was referring to with the V710 statement.
There was also a rubbing issue on the trailing arm though, similar to what one of these guys described as "shining it up", which is what Sander was referring to, and what I was referring to with the V710 statement.
01-01-2010, 02:28 PM
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Re: 15/9 wheels ,what tyres
Correct. Which is why I'm confused as to why no one else seems to have that problem...
There was also a rubbing issue on the trailing arm though, similar to what one of these guys described as "shining it up", which is what Sander was referring to, and what I was referring to with the V710 statement.
There was also a rubbing issue on the trailing arm though, similar to what one of these guys described as "shining it up", which is what Sander was referring to, and what I was referring to with the V710 statement.
--Andy
01-02-2010, 06:27 AM
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Re: 15/9 wheels ,what tyres
BTW, grinding off that ridge weakens the part substantially. If you race that car, you need to put a different arm up there.
--Andy
01-02-2010, 11:52 AM
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01-02-2010, 01:09 PM
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Re: 15/9 wheels ,what tyres
I only had to grind maybe 1/4" off of the corner, not the entire ridge. I've also been tracking the car with those arms for 2 years, so if something was going to fail I think it would have by now. Thanks for the concern though
I did also try a BFH with zero success.
I did also try a BFH with zero success.
01-02-2010, 08:52 PM
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Re: 15/9 wheels ,what tyres
I had to remove part of the lip on my 00 civic si rear parts, also have the shint spot mentioned on the RTA. Konig 15x7.5 32 offset 225/45/15 T1R
01-09-2010, 08:29 PM
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Re: 15/9 wheels ,what tyres
Just for another data point; +36 ET 15x8 949 Racing 6UL's with 225/45-15 Nitto NT-01 fit fine all around on a DA ('90 RS) with stock control/trailing arms, untouched fenders, around 2 degrees camber front/ 3 degrees camber rear, and lowered around 1".
Picture of setup in action
Picture of setup in action
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