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Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires. |
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12-04-2019, 01:25 AM | #29 |
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Give me a narrower tyre with better compound.
I'm at 270hp-280nm running 235 RE003 (Indy 500) on a 8" rim. I had better grip with a 215 RS4 on the 8". The Indy 500's are slightly better in the wet than the RS4's, and I got them on sale, BUT, it was an unfortunate compromise which I won't do again. Next will be 225/45 or maybe 235/45 Hankook RS4, you cannot beat them for a bang for your buck tyre.
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12-04-2019, 08:57 AM | #30 |
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My personal, subjective experience is:
when you reduce unsprung weight by about 6lb (per corner), the perceived gain in performance (acceleration, ride quality, handling, etc) is slight but noticeable; and when you increase unsprung weight by about 6lb (per corner), the perceived loss in performance is much bigger and intolerable. As my wife would say:this is not the car I have known all along. |
12-04-2019, 01:12 PM | #31 | |
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Even flywheel mass reduction isn't all that effective as far as outright acceleration goes. Bigger difference is in shifting |
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12-04-2019, 02:33 PM | #32 |
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https://grassrootsmotorsports.com/ar...really-better/
Interesting article. The gist is the lighter the vehicle and the slower the speed the more weight reduction and especially rotational weight reduction makes a bigger difference as the force required to rotate the mass becomes a larger percentage of overall force needed to accelerate, and same goes for lower hp cars, the force needed to rotate the mass becomes a larger percentage of available force output. So rotational weight reduction on a 2000lbs car with 150hp accelerating from 20-60mph will have a substantially bigger difference then a 4000lbs car with 300hp accelerating from 60-100mph. |
12-04-2019, 04:23 PM | #33 |
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Wheel rigidity > wheel weight.
Also, lose weight on your tires if you're concerned about weight! Wheel design can change inertia without changing weight, and inertia is what you're really fighting! |
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12-04-2019, 04:47 PM | #34 |
12-04-2019, 04:59 PM | #35 |
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Related to that, I'm always blown away by the difference in weight of a full tread tire versus the same tire shaved or worn down.
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12-04-2019, 05:24 PM | #36 | |
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If they were going to always put a HEAVY tire on it... oh well.
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Last edited by CSG Mike; 12-05-2019 at 01:42 AM. |
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12-05-2019, 02:17 AM | #37 | |
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I think it's overlooked because the data is mostly unavailable. |
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12-05-2019, 02:32 PM | #38 | |
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