Tire/Wheels for higher hp/tq M40s

djmcbride1980 · 07-21-2023, 12:01 PM

I am currently drag racing the vehicle once a month running a 12.06 @ 112.58mph. I make 442whp/483wtq currently. I am running stock 19x7.5s with all-season run flats.

I am installing my Dorch Stage 2 pump next month to run E mixes and should be in the 500whp/550wtq range.

I am looking at a set of 20x8.5 wheels with 255/45/20 or 255/40/20 Michelin PS4S tires.

Is anyone else running this setup on a 500+whp vehicle and the traction is enough? I'd rather not find out the tires are breaking loose and need to go bigger after buying this setup.

Will these fit without spacers? I know absolutely nothing about wheels and while trying to learn, I am at a loss.

Any help is appreciated. I included the picture because I can not tell if these will even fit.

Thank you!

ASAP · 07-21-2023, 12:19 PM

Off topic but 112 is not so great of a trap for a 440 WHP vehicle... the weight really punishes this car... a stock X3M is still significantly faster than this somehow...

djmcbride1980 · 07-21-2023, 12:34 PM

Quote:

Originally Posted by ASAP

Off topic but 112 is not so great of a trap for a 440 WHP vehicle... the weight really punishes this car... a stock X3M is still significantly faster than this somehow...

Race weight was 4530lbs

sikedsyko · 07-21-2023, 12:34 PM

I run a 255/55/18 on a 18x8"et35 and they fit fine. Looks like it would be very close to your 255/45/20 setup.

Dealership complained about how close the tire was to the shock in the front, but there's no evidence of rubbing.

Oldgixxer · 07-21-2023, 01:41 PM

goldfz8 has a sweet tire/wheel setup off his X3M (w spacers) currently for sale on the forum,he was able to achieve 1.4x 60' times......
Maybe the experts here will chime in if those would fit on you M40i

djmcbride1980 · 07-21-2023, 01:55 PM

Quote:

Originally Posted by Oldgixxer

goldfz8 has a sweet tire/wheel setup off his X3M (w spacers) currently for sale on the forum,he was able to achieve 1.4x 60' times......
Maybe the experts here will chime in if those would fit on you M40i

Those are really nice wheels and a 1.4x 60' would be great, but I do not want drag radials at this point as I still daily drive the vehicle. Thnak you for the input.

goldfz8 · 07-21-2023, 02:17 PM

Quote:

Originally Posted by djmcbride1980

Those are really nice wheels and a 1.4x 60' would be great, but I do not want drag radials at this point as I still daily drive the vehicle. Thnak you for the input.

Hey All, Great runs.. your perfectly In line with where you should be at. For reference my stock x3m 510hp went 117mph. While you definitely don't need a drag radial setup and with 500whp you wouldn't do 1.4s as it takes me 700 lol. nittos are softer and if you intend on dig racing you might find out the hard way that no drag tires hurt cars when doing drag things. Also nittos are amazing. I use them year round in nyc.

djmcbride1980 · 07-21-2023, 02:40 PM

Quote:

Originally Posted by goldfz8

Hey All, Great runs.. your perfectly In line with where you should be at. For reference my stock x3m 510hp went 117mph. While you definitely don't need a drag radial setup and with 500whp you wouldn't do 1.4s as it takes me 700 lol. nittos are softer and if you intend on dig racing you might find out the hard way that no drag tires hurt cars when doing drag things. Also nittos are amazing. I use them year round in nyc.

Thank you for the input, glad to hear I am on point. My last run on all-season run-flats was a 1.76 60' on that 12.06 run and that is at 442whp. MHD Stage 2, XHP, and ER Catless DP.

goldfz8 · 07-21-2023, 02:42 PM

Quote:

Originally Posted by djmcbride1980

Thank you for the input, glad to hear I am on point. My last run on all-season run-flats was a 1.76 60' on that 12.06 run and that is at 442whp. MHD Stage 2, XHP, and ER Catless DP.

you can definitely improve that 60 tho.keep up

COM40 · 07-21-2023, 02:59 PM

Quote:

Originally Posted by djmcbride1980

Thank you for the input, glad to hear I am on point. My last run on all-season run-flats was a 1.76 60' on that 12.06 run and that is at 442whp. MHD Stage 2, XHP, and ER Catless DP.

Is that with launch control?

djmcbride1980 · 07-22-2023, 11:19 AM

Quote:

Originally Posted by goldfz8

you can definitely improve that 60 tho.keep up

I will do my best, thank you!

Quote:

Originally Posted by COM40

Is that with launch control?

No, I haven't used it a lot. I will get more practice this year. I made very few runs last year.

07-21-2023, 12:01 PM	#1
djmcbride1980 Private 113 Rep 75 Posts Drives: 2019 BMW X4 M40i Join Date: Dec 2021 Location: Nashua, New Hampshire iTrader: (0)	Tire/Wheels for higher hp/tq M40s I am currently drag racing the vehicle once a month running a 12.06 @ 112.58mph. I make 442whp/483wtq currently. I am running stock 19x7.5s with all-season run flats. I am installing my Dorch Stage 2 pump next month to run E mixes and should be in the 500whp/550wtq range. I am looking at a set of 20x8.5 wheels with 255/45/20 or 255/40/20 Michelin PS4S tires. Is anyone else running this setup on a 500+whp vehicle and the traction is enough? I'd rather not find out the tires are breaking loose and need to go bigger after buying this setup. Will these fit without spacers? I know absolutely nothing about wheels and while trying to learn, I am at a loss. Any help is appreciated. I included the picture because I can not tell if these will even fit. Thank you! Attached Images
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07-21-2023, 12:19 PM	#2
ASAP Major General 10161 Rep 8,626 Posts Drives: '23 X3 M40i Join Date: Sep 2012 Location: FL iTrader: (0)	Off topic but 112 is not so great of a trap for a 440 WHP vehicle... the weight really punishes this car... a stock X3M is still significantly faster than this somehow... __________________ 2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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07-21-2023, 12:34 PM	#4
sikedsyko Private 41 Rep 75 Posts Drives: 2005 Z4 Join Date: Jul 2015 Location: Houston iTrader: (0)	I run a 255/55/18 on a 18x8"et35 and they fit fine. Looks like it would be very close to your 255/45/20 setup. Dealership complained about how close the tire was to the shock in the front, but there's no evidence of rubbing.
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07-21-2023, 01:41 PM	#5
Oldgixxer Captain 1914 Rep 807 Posts Drives: nothing fast Join Date: Jan 2020 Location: The Lowcountry,SC iTrader: (0)	goldfz8 has a sweet tire/wheel setup off his X3M (w spacers) currently for sale on the forum,he was able to achieve 1.4x 60' times...... Maybe the experts here will chime in if those would fit on you M40i __________________ -'24 X5MC,'22 430i -'09 Busa,'05 GSXR-1K(GT28R turbo)'00 Busa(GT3582) Gone but not forgotten: -'22 X3MC,'20 M550i,'18 X2,F30 328xi,'07 E63 AMG (1st W211 63 in the 11s),997 C4S Cab,CLS55 AMG,E55 AMG,C55AMG
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