Performance of 18" OE wheels vs 19" aftermarket
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Tire - 285/30R18 >Search Tires Tire 1 - 305/30R19 >Search Tires Tire 2 - 285/35R18 >Search Tires Tire 3 - 305/25R19 >Search Tires Section Width:11.22 in285 mmSection Width:12.00 in305 mmSection Width:11.22 in285 mmSection Width:12.00 in305 mmRim Diameter:18 in457.2 mmRim Diameter:19 in482.6 mmRim Diameter:18 in457.2 mmRim Diameter:19 in482.6 mmRim Width Range:10 - 11 inRim Width Range:10.5 - 11.5 inRim Width Range:9.5 - 11 inRim Width Range:11.5 - 12.5 inOverall Diameter:24.73 in628.14 mmOverall Diameter:26.20 in665.48 mmOverall Diameter:25.85 in656.59 mmOverall Diameter:25.00 in635 mmSidewall Height:3.36 in85.344 mmSidewall Height:3.60 in91.44 mmSidewall Height:3.92 in99.568 mmSidewall Height:3.00 in76.2 mmRadius:12.36 in313.94 mmRadius:13.10 in332.74 mmRadius:12.92 in328.16 mmRadius:12.50 in317.5 mmCircumference:77.69 in1973.3 mmCircumference:82.30 in2090.4 mmCircumference:81.21 in2062.7 mmCircumference:78.53 in1994.6 mmRevs per Mile:841.0Revs per Mile:793.8Revs per Mile:804.6Revs per Mile:832Actual Speed:60 mph100 km/hSpeedometer1:56.6 mph94.3 km/hSpeedometer1:57.4 mph95.6 km/hSpeedometer1:59.3 mph98.9 km/hSpeedometer Difference: -Speedometer Difference: 5.946% too slowSpeedometer Difference: 4.523% too slowSpeedometer Difference: 1.081% too slowDiameter Difference: -Diameter Difference: 5.62%Diameter Difference: 4.34%Diameter Difference: 1.08%
The 25 is the best match for the stock C4S rear - why has that been entered into the mix?
The 25 is the best match for the stock C4S rear - why has that been entered into the mix?
you just used up your yearly allocation of Goezintas.
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Mathism- Yeah I agree and had done some research similar to Steve's. How does your car ride with the 25 series tires? is it harsh?
Hey here's one- The Carrera GT comes rolling on 20's. For the sake of argument on performance wouldn't it make more sense to run a smaller wheel?
Hey here's one- The Carrera GT comes rolling on 20's. For the sake of argument on performance wouldn't it make more sense to run a smaller wheel?
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brakes
Mathism- Yeah I agree and had done some research similar to Steve's. How does your car ride with the 25 series tires? is it harsh?
Hey here's one- The Carrera GT comes rolling on 20's. For the sake of argument on performance wouldn't it make more sense to run a smaller wheel?
Hey here's one- The Carrera GT comes rolling on 20's. For the sake of argument on performance wouldn't it make more sense to run a smaller wheel?
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I only put about 30 miles on the car w/ the 19's before having pss10's installed. So, it is hard to give a fair comparison of 18 vs 19 on the same suspension. My initial impression of the 19's was how similar the ride was to the 18's. I didn't notice it to be much different - positive or negative. With both wide 19's and pss10 the rear end certainly feels more planted. I'm doing an autocross w/ the BMW club this weekend. We'll see how it holds up under low speed thrashing.
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plus, on a half million dollar car they can budget a lot for the lightest and strongest wheels available. there's no performance penalty (rotating mass-wise) if the wheels are super light. and, the tires can be some super sticky exotic compound with a low wear rating. 'cause if you dropped half a mil. on a car, what's a few thousand for new tires after a few spirited outings?
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