Wheels & Tyres FAQ- please read before posting

Fed up with your run flats? Fancy a change of rubber?
Looking a new set of wheels? Get all your tyre/alloys info in here

Moderators: Rich196, babybmwadmin, marco_polo, Producethis

mar27
Junior Member
Junior Member
Posts: 6
Joined: Sat Nov 22, 2014 11:29 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby mar27 » Sat Sep 05, 2015 5:47 pm

marco_polo wrote:I'd double check they clear the front struts before handing over your hard earned dollar, I wouldn't be surprised if you needed a spacer?


Will do, thanks.
2008 118d E87 Sparkling Graphite

User avatar
dorsetred
Enthusiastic Member
Enthusiastic Member
Posts: 577
Joined: Tue Feb 25, 2014 4:48 am

Rim offset, Wheel size & track - What does that mean?

Postby dorsetred » Mon Sep 07, 2015 8:30 am

I've seen several members posting up wheels and tyres on the forum and due to lack of knowledge always ended up asking or checking to see if the respective item would fit, as a result and without going through each page I managed to find an answer as follows: -

Rim offset, Wheel size & track - What does that mean?

Wheel Markings: - on the inside of your wheel, you will find markings similar to this: - 6 ½ J x 15 H2 5/120 ET39

Let’s see what each of these symbols mean.

6 ½: - Inner width of wheel in inches (6 ½ x 25.4mm= 152.4mm).

J: - Indicates the shape of the wheel on the place where the tyre bead sits on the wheel.

x: - Indicates that the construction of the wheel is one-piece.

15: - Nominal wheel diameter in inches (15 x 25.4mm= 381mm).

H2: - Type of wheels flange. Wheels flange is a bulge on the wheel in the place where the tyre bead lies on the wheel. It prevents the tyre from falling inside of the wheel.

5/120: - First number is the number of bolts (in our case 5). The number 120 indicates the so-called PCD (Pitch Circle Diameter) which is the diameter of an imaginary circle drawn through the centre hole of the screws on which the wheel is mounted.

ЕТ39: - ET is the offset, that is the distance between the centerline of the wheel and the plane of the hub-mounting surface of the wheel. The offset is measured in millimetres and can be positive or negative. In our case it is positive: 39 mm.

Hope this helps other people.

dorsetred 8)

EDIT: By moderator, to save confusion.
MY15 F45 218d M Sport Active Tourer
Previous - MY13 E82 118d Sports Plus Edition, MY11 Honda Civic V-Tech Type R GT, MY09 Volvo C-30 1.8 R-Design, MY01 Honda HRV, too many more.

max913
Junior Member
Junior Member
Posts: 1
Joined: Mon Feb 01, 2016 5:55 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby max913 » Mon Mar 07, 2016 6:14 pm

Ive read every post in this topic on what tires i should get for my new rims.
Still not sure tho, iv picked up some styling 180s 7.5j front 8j back.
My car is not lowered and have no intention to do so in the future, now a friend told me that i should get 225/40/18 all around then.
The chart on my doorpanel says: Front 205/45/18 or 215/40/18
Back 225/40/18 or 245/35/18
I just want to know what will look best. :?
Thx

ian_h
Junior Member
Junior Member
Posts: 37
Joined: Tue Jan 19, 2016 4:31 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby ian_h » Tue Oct 04, 2016 10:55 am

Can someone confirm if I was to put 225/45 on the front and 235/45 on the rears will it mess up the sensors?
It's currently on 205/50 front and 225/45 rear so surely it's just the same as it has a staggered size already?

According to the garage that was about to fit them there bmw tech guy says it will trigger the sensors and the speedo will be out.

Any help appreciated
E87 2010 120d - P-torque remap 222 bhp - BMWP exhaust - ssk - clubsport gearknob - cdv delete - bee sting aerial

User avatar
marco_polo
Too Much Time To Waste Member
Too Much Time To Waste Member
Posts: 45121
Joined: Tue Apr 06, 2010 9:40 am
Location: Omnipresent Post Whore

Re: Wheels & Tyres FAQ- please read before posting

Postby marco_polo » Tue Oct 04, 2016 5:25 pm

ian_h wrote:Can someone confirm if I was to put 225/45 on the front and 235/45 on the rears will it mess up the sensors?
It's currently on 205/50 front and 225/45 rear so surely it's just the same as it has a staggered size already?

According to the garage that was about to fit them there bmw tech guy says it will trigger the sensors and the speedo will be out.

Any help appreciated

Reset the TPMS once fitted, and it will be fine.

The speedo will be a tiny bit more accurate (by 1.3% ).
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - TMC Piggyback - M4 LCA's - aFe Dry Filter

Please help the Mod's by using the report [ ! ] button where appropriate

IanM240i
Junior Member
Junior Member
Posts: 3
Joined: Sat Nov 26, 2016 2:54 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby IanM240i » Sat Nov 26, 2016 3:14 pm

Hi Newbie here. I have looked through the FAQ but still have a query. I recently picked up my M240i and had 19" Double-Spoke 405M fitted as part of the M performance kit. I still have the original 18" wheels with tyres but I am looking for some winter tyres to put on the original wheels for when the weather gets really bad. I have 2 queries.
1, Do you have to tell the car when you put the 18" wheels on or is it just fit?
2, Does anyone have recommendations for winter tyres to fit the 18"s?
Ian H M240i Mineral Grey

User avatar
marco_polo
Too Much Time To Waste Member
Too Much Time To Waste Member
Posts: 45121
Joined: Tue Apr 06, 2010 9:40 am
Location: Omnipresent Post Whore

Re: Wheels & Tyres FAQ- please read before posting

Postby marco_polo » Sat Nov 26, 2016 3:56 pm

IanM240i wrote:1, Do you have to tell the car when you put the 18" wheels on or is it just fit?
2, Does anyone have recommendations for winter tyres to fit the 18"s?
Ian H M240i Mineral Grey

1) You need to reset the TPMS per the manual, but that's it.
2) I usually recommend 225/40/18 92v front, and 235/40/18 95v for the back (245/35 are silly money). Matched brands, quality tyres. I like Nokians for winters, Conti's are popular 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

Please help the Mod's by using the report [ ! ] button where appropriate

IanM240i
Junior Member
Junior Member
Posts: 3
Joined: Sat Nov 26, 2016 2:54 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby IanM240i » Sat Nov 26, 2016 4:15 pm

Many Thanks Marco_Polo. I'll start looking.

msej449
Knowledgeable Member
Knowledgeable Member
Posts: 149
Joined: Thu Jul 21, 2016 5:51 pm
Location: Brighton UK & La Tzoumaz CH

Re: Wheels & Tyres FAQ- please read before posting

Postby msej449 » Wed Dec 21, 2016 10:39 am

@IamM240i - I looked at this option and all I could find were the Pirelli Winter Sottozero Serie-II to fit the original offset wheel sizes (18" 7.5J front, 8J rear). Of course, these aren't cheap but I had them on my 330d xDrive and they were very good: they handled well in warmer conditions and were still great in snow. Be careful about Runflat versus non-runflat versions - some of the cheaper prices are for non-runflats (fine if that's your choice, but easy to miss). It was a close-run thing, but in the end, I opted for new wheels from an independent dealer with square 17" 7.5J all-'round carrying the Pirelli Sottozero S3. BMW also do a number of winter sets (wheels +tyres) for the M240i but these are all around £1500-£1800 (!) It has to be said that replacing the tyres alone is a lot cheaper, although the narrower width (7.5J) and diameter (17") rears noticeably reduced the tendency to aquaplane in deep water.
2016 M235i Convertible Estoril Blue
Wolfrace Drive 7.5Jx17 + Pirelli Sottozero-3 225/45-17

IanM240i
Junior Member
Junior Member
Posts: 3
Joined: Sat Nov 26, 2016 2:54 pm

Re: Wheels & Tyres FAQ- please read before posting

Postby IanM240i » Fri Dec 23, 2016 2:05 pm

Hi, thanks for info. I was looking at Conti 850 as they reviewed very well in trials but not many about. Runflat winters are prohib expensive! Still looking. Ian


Return to “Tyres/Wheels”

Who is online

Users browsing this forum: No registered users and 1 guest