tyre advice

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ronanh
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tyre advice

Post by ronanh » Mon Jun 25, 2018 9:31 pm

ok i need a little help. i'm sure it's been covered here before but i couldn't find anything recent using the search function. i've alot of questions for anyone who has run wider wheels on an M135i.

I have a new set of wheel arriving this weekend for my M135i - BBS CH-R, 18x8 ET40 & 18x9 ET44. Car is lowered on KW V1 coilovers.
I'm struggling to decide on what tyres to go for. These wheels will be used April - October only, but i'm in the north of Ireland so roads will be wet/damp for 40% of the time. Would do 1 or 2 track days per year.

I've run stock MPSS for the last two years and am very happy with them. only issue has been melting the outer edges of the front tyres.
So what i've been wondering is:
-will 245 & 265 fit on an M135i with my offsets
-would 225 & 245 be too stretched on these widths ( i like a chunky tyre)
-would 245 MPSS fronts be too dangerous with Aquaplaning
-would MPS4 offer me enough grip when i'm used to MPSS?
-anyone run Cup 2's on for road use?

Last questions - where is best to buy a spare set of TPMS? direct from BMW? and how much should i expect to pay.

Thanks in advance
R
2016 F21 LCI M135i AW

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marco_polo
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Re: tyre advice

Post by marco_polo » Mon Jun 25, 2018 10:58 pm

Tricky one, as not many track day tyres excel in the wet.

265mm rears aren't going to fit at ET44, but you could happily run a 255/35/18.

I'd probably go for 245/35/18 front and 255/35/18 rear in the MPSS as they'll tolerate some track work. Take it steady on very wet days / over deep standing water though, or you'll end up in the weeds. Or forget about stints on Track and go for the PS4. You can legally use Cup2's on the road, but they dislike deep water even more than MPSS, I couldn't recommend those for 40% wet use.

I'd swap your TPMS over from your current wheels, or take a punt on a genuine set from eBay for £100ish. Maybe try the TPMS Warehouse too.
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - TMC Piggyback - M4 LCA's - aFe Dry Filter

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ronanh
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Re: tyre advice

Post by ronanh » Tue Jun 26, 2018 7:41 am

Thanks, I didn't know MPSS where available in 255, I thought it was only 245 and 265?

Will 245's definitely fit on the front when lowered approx 30mm?
2016 F21 LCI M135i AW

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marco_polo
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Re: tyre advice

Post by marco_polo » Tue Jun 26, 2018 7:51 am

https://www.mytyres.co.uk/rshop/Tyres/M ... /R-300303#

245mm at ET40 are absolutely fine on a lowered front if you're on stock wishbones?
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - TMC Piggyback - M4 LCA's - aFe Dry Filter

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ronanh
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Re: tyre advice

Post by ronanh » Tue Jun 26, 2018 10:37 am

Yep stock wishbones. Thanks very much for the info
2016 F21 LCI M135i AW

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