05-14-2019, 03:39 AM | #1 |
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18 vs 19 for semi slick grip/traction focus?
dear all,
is there a noticeable difference between 18“ and 19“ for track use? front 245/40/18 vs 245/35/19 pirelli trofeo r (michelin cup2 also available) rear 265/40/18 vs 265/35/19 pirelli trofeo r or michelin cup2 18“ tires are cheaper.. lightest and cheapest rims are m513 9x18 / 10x18 oem, apex sm 10 are available in 18/19“. -are 18“ wheels (tire and rubber) lighter in general? I found no tire weights.. -is the combination of 19“ front (i’ve got bbk 400mm brake discs) and 18“ rear (possible with bbk 380mm? to gain maximum traction and minimal weight/tire pirce feasible? -are 18“ rims fitting the rear axle when the m2competition bbk - 380mm rear discs - are mounted? without bbk i would install oem m513 for sure. with bbk i’ve the strange idea trying apex 19“ front and 18“ rear, pro’s and con’s? Last edited by vale007; 05-14-2019 at 01:05 PM.. |
05-14-2019, 10:05 AM | #3 | |
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OP 18 vs. 19 is a choice you already made by selecting the factory BBK. As you know you are forced into 19s at the front. The rear I am not sure but the diameter needs to be close to OEM or the TC and some other assistance things wont be happy. |
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05-14-2019, 12:31 PM | #4 | |
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05-14-2019, 01:15 PM | #5 | |
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pro and cons of 18“ track tires? i may sell my car soon and order another m2c(s)(without bbk) so let me know. i guess grip&traction should be better with 18, acceleration I don’t know?! i‘ve never tested on this F87 car, only on e92 M3, there 18“ felt more nimble and responsive so performed better IMO! |
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05-14-2019, 01:56 PM | #6 |
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19s are faster than 18s on track bc you can fit 295/305s in the rear with the right wheel/suspension alignment setup.
If you’re not putting 295/305s in the back, I’d stick with 18s. |
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05-14-2019, 02:32 PM | #7 | |
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The wheels weigh less... though I'm not sure the the wheel/tire combo weighs less as a whole. |
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05-14-2019, 02:42 PM | #8 | |
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18” square is the best way to go for bang for the buck. 19” staggered for the fastest times. I’ve run both. Either is good. Pick your preference. |
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05-15-2019, 02:50 AM | #9 | |
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Why don't 295/305s in 18s with the right aspect ratio fit? |
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05-15-2019, 05:05 AM | #10 | |
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Those widths in 18s would fit fine. There just isn’t many 18” tire options with those widths for the rear, while keeping the rear tire taller than the front. |
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