Best Size for Michelin Pilot Super Sports on 135i

MikesBMW · 03-20-2015, 09:41 PM

Buying my first set of MPSS tires and wanted to know what the consensus is on proper sizing. Stock is 215 40 18 and 245 35 18. I'm considering 225/40 and 255/35.

For spirited every day driving (no tracking) what would be the best size? I'd like it to handle as best as possible on normal roads and highways. Also have BMW Performance Suspension so I'm lowered just a tad.

MikesBMW · 03-20-2015, 09:45 PM

Also would consider 225/40 and 245/35. Thoughts on that?

Other mod to take into account is that I have PPK, so a bit more power going to the rear wheels.

Pyrat 2 · 03-20-2015, 10:00 PM

225/40 + 245/35 is a good balance for the street. Less understeer than stock and no fitment issues.

MikesBMW · 03-20-2015, 10:11 PM

Quote:

Originally Posted by HeelToe

225/40 + 245/35 is a good balance for the street. Less understeer than stock and no fitment issues.

Any chance that would cause "oversteer" or is it a very minor change

Esteban · 03-21-2015, 05:23 AM

I just put 225/40 and 255/35 tires on my car with stock size wheels and the BMW Performance suspension. Not Michelins but Pirellis. Nicely fills the wheel well. Hardly any gap between the fender and the tire and no rubbing at all. Perfect fit. Glad I did it!

Pyrat 2 · 03-21-2015, 06:24 AM

Quote:

Originally Posted by BMW135iMike

Quote:

Originally Posted by HeelToe

225/40 + 245/35 is a good balance for the street. Less understeer than stock and no fitment issues.

Any chance that would cause "oversteer" or is it a very minor change

No chance of oversteer with this combo. Unless of course you are talking throttle induced. In that case the throttle induced oversteer is no better or worse than stock.

Dilmorecg · 03-21-2015, 12:53 PM

225/40 and 255/35 MPSS is what I am running...Just put them on and it is much better than the stock runflats.

MikesBMW · 03-21-2015, 12:55 PM

Quote:

Originally Posted by Dilmorecg

225/40 and 255/35 MPSS is what I am running...Just put them on and it is much better than the stock runflats.

Does it feel floaty or squishy at all by upsizing. The tires are slightly taller at that size.

MikesBMW · 03-21-2015, 08:20 PM

About to order. Any last thoughts anyone?

jonathan13 · 03-21-2015, 08:47 PM

I don't have anything to add, but once you do buy and get them installed, let us know what you think.

MikesBMW · 03-21-2015, 09:09 PM

Ok, I just ordered the 225/40/18 fronts and 245/35/18 rears... decided to go with those because they were actually $50 cheaper than the 255s and it will ensure I don't have rubbing issues.

Total price from Tirerack was $830 shipped and there is a $70 mail in rebate :-) offer expires today which is why I was in a rush to order.

Will post pics and let you guys know how they are

Esteban · 03-21-2015, 11:17 PM

This is how 225/40 and 255/35 look with the BMW Performance suspension. No rubbing.

Pyrat 2 · 03-22-2015, 06:08 AM

Quote:

Originally Posted by BMW135iMike

Ok, I just ordered the 225/40/18 fronts and 245/35/18 rears... decided to go with those because they were actually $50 cheaper than the 255s and it will ensure I don't have rubbing issues.

Total price from Tirerack was $830 shipped and there is a $70 mail in rebate :-) offer expires today which is why I was in a rush to order.

Will post pics and let you guys know how they are

You'll be happy with this combo. Should in theory have slightly less understeer than stock. If you want to go back to stock like understeer with better rear traction then you can go 225 front and 255 rear with no rubbing concerns on stock wheels. I have had 235/40 in front in the past and currently have 245/35 in front. The 245/35 fitment in front requires camber and offset work to make it fit. I don't know if the 235/40 fitment requires work. I'm running -1.5 camber and never tried the fitment on a stock alignment or wheels/offsets.

MikesBMW · 03-22-2015, 06:34 AM

Quote:

Originally Posted by EvenEsteban

This is how 225/40 and 255/35 look with the BMW Performance suspension. No rubbing.

Wow that looks incredible. Are those wheels 18 or 19s?

There are a couple large speed bumps I have to go over daily and a pretty nasty seem/dip in the highway on my daily drive so that's where I'm concerned about running with a 255 rear

Esteban · 03-22-2015, 04:30 PM

Quote:

Originally Posted by BMW135iMike

Wow that looks incredible. Are those wheels 18 or 19s?

18

MikesBMW · 03-22-2015, 05:05 PM

Quote:

Originally Posted by EvenEsteban

Quote:

Originally Posted by BMW135iMike

Wow that looks incredible. Are those wheels 18 or 19s?

18

Looks perfect

Adam135 · 03-22-2015, 05:18 PM

225/40/18 and 255/35/18.

MikesBMW · 03-22-2015, 05:58 PM

Looks great. How many miles do the rears usually last? Maybe I'll up to 255s once the rears are worn out. Hoping the fronts last me through two sets of rears

135TX · 03-22-2015, 06:29 PM

I had 255/35 rear mpss and stock wheels(261) & stock suspension and the rears rubbed on hard compression.
Pm me if you have questions

MikesBMW · 03-22-2015, 07:20 PM

Quote:

Originally Posted by 135TX

I had 255/35 rear mpss and stock wheels(261) & stock suspension and the rears rubbed on hard compression.
Pm me if you have questions

Interesting. It's so odd that the reviews are so mixed on rubbing or not with PSS 255 rears on stock wheels

Adam135 · 03-22-2015, 07:50 PM

Quote:

Originally Posted by 135TX

I had 255/35 rear mpss and stock wheels(261) & stock suspension and the rears rubbed on hard compression.

Same here. It went away after a few thousand miles but it was annoying. I'll probably do 245 next time even though I love the 255s.

MikesBMW · 03-22-2015, 08:16 PM

How many miles have the PSS tires lasted for you guys?

03-20-2015, 09:41 PM	#1
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	Best Size for Michelin Pilot Super Sports on 135i Buying my first set of MPSS tires and wanted to know what the consensus is on proper sizing. Stock is 215 40 18 and 245 35 18. I'm considering 225/40 and 255/35. For spirited every day driving (no tracking) what would be the best size? I'd like it to handle as best as possible on normal roads and highways. Also have BMW Performance Suspension so I'm lowered just a tad.
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03-20-2015, 09:45 PM	#2
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	Also would consider 225/40 and 245/35. Thoughts on that? Other mod to take into account is that I have PPK, so a bit more power going to the rear wheels.
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03-20-2015, 10:00 PM	#3
Pyrat 2 Colonel 1418 Rep 2,560 Posts Drives: Rapidly from A to B Join Date: Jun 2005 Location: Chicago 'burbs or TN Smokies iTrader: (3) Garage List 2022 Porsche GT4 [9.64] 2018 Porsche GT3 [9.33] 2007 Z4 M Roadster [8.33] 2020 BMW X1 [0.00]	225/40 + 245/35 is a good balance for the street. Less understeer than stock and no fitment issues. __________________ '07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs
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03-21-2015, 05:23 AM	#5
Esteban Major General 43573 Rep 7,224 Posts Drives: a slow car fast Join Date: Jun 2014 Location: SoCal iTrader: (0)	I just put 225/40 and 255/35 tires on my car with stock size wheels and the BMW Performance suspension. Not Michelins but Pirellis. Nicely fills the wheel well. Hardly any gap between the fender and the tire and no rubbing at all. Perfect fit. Glad I did it! __________________
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03-21-2015, 12:53 PM	#7
Dilmorecg Second Lieutenant 115 Rep 256 Posts Drives: 2014 X5 50i Join Date: Feb 2014 Location: Gig Harbor, WA iTrader: (1)	225/40 and 255/35 MPSS is what I am running...Just put them on and it is much better than the stock runflats. __________________ 2014 X5 50i
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03-21-2015, 08:20 PM	#9
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	About to order. Any last thoughts anyone?
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03-21-2015, 08:47 PM	#10
jonathan13 Private First Class 18 Rep 138 Posts Drives: Tanzanite Blue ‘16 M3 Join Date: Feb 2015 Location: Tennessee iTrader: (2)	I don't have anything to add, but once you do buy and get them installed, let us know what you think.
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03-21-2015, 09:09 PM	#11
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	Ok, I just ordered the 225/40/18 fronts and 245/35/18 rears... decided to go with those because they were actually $50 cheaper than the 255s and it will ensure I don't have rubbing issues. Total price from Tirerack was $830 shipped and there is a $70 mail in rebate :-) offer expires today which is why I was in a rush to order. Will post pics and let you guys know how they are
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03-21-2015, 11:17 PM	#12
Esteban Major General 43573 Rep 7,224 Posts Drives: a slow car fast Join Date: Jun 2014 Location: SoCal iTrader: (0)	This is how 225/40 and 255/35 look with the BMW Performance suspension. No rubbing. Attached Images __________________
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03-22-2015, 05:18 PM	#17
Adam135 Captain 72 Rep 961 Posts Drives: 2014 435i Join Date: Oct 2011 Location: USA iTrader: (2)	225/40/18 and 255/35/18. Last edited by Adam135; 03-22-2015 at 05:44 PM..
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03-22-2015, 05:58 PM	#18
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	Looks great. How many miles do the rears usually last? Maybe I'll up to 255s once the rears are worn out. Hoping the fronts last me through two sets of rears
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03-22-2015, 06:29 PM	#19
135TX Lieutenant 89 Rep 527 Posts Drives: '11 135i Join Date: Dec 2014 Location: Austin, Texas iTrader: (5)	I had 255/35 rear mpss and stock wheels(261) & stock suspension and the rears rubbed on hard compression. Pm me if you have questions
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03-22-2015, 08:16 PM	#22
MikesBMW Banned 318 Rep 1,410 Posts Drives: X3 M40i Join Date: Jul 2010 Location: Ohio iTrader: (1) Garage List 2019 BMW X3 M40i [0.00] 2017 BMW X1 [0.00]	How many miles have the PSS tires lasted for you guys?
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