Hi,

I've got an M635, And I'm looking to purchase some alloys and found some from a '97 Seven series could someone tell me if they can be fitted to a E24? they are 245/55R16 5 Stud. Can they just be swapped does anyone know ?

Thanks

Tim

timausten wrote: Hi, I've got an M635, And I'm looking to purchase some alloys and found some from a '97 Seven series could someone tell me if they can be fitted to a E24? they are 245/55R16 5 Stud. Can they just be swapped does anyone know ?

What is the alloy size? Is it 8x16 all round? Or something else?

Sorry but I no idea when it comes to tyre size, but all four are the same I believe as above. What he said exactly 245/55R16 100W

If they are 8 x 16 will they rub ? or just when on full lock on front ?

     There will be clearance issues on the front strut almost certainly.

timausten wrote: Sorry but... no idea when it comes to tyre size, but all four are the same I believe as above. What he said exactly 245/55R16 100W

One of the original tyre sizes was 240/45 R415, so you have an increase in width and aspect ratio.  

If they are 8 x 16 will they rub ? or just when on full lock on front ?

8x16 should be fine (many cars are on 8x17), especially at rear, but your tyre size would then have to be as near as possible to the original metric proportions. This is partly because you do not want to affect speedo readings too greatly.

In terms of full lock at front, it sounds as though you might be slightly hampered by the current tyre size there.

your new tyres will be a larger diameter; this will throw the speedo off. I estimate the new tyres to give an overall diameter of 675mm, where 640mm is a 'normal' size for an E28.

This means that the tyres will probably foul the front strut, even if the wheel offset (which should be ET15 for an 8" rim on your car) is OK.

cheers

Hi

Thanks for your posts, Give me something to think about !

Tim

The wheels will more than likely fit, but the tyres will need to be changed as they are just too big. I run 16x7 wheels with 225/50/zr16 tyres. To be honest the sixes with the larger metrics are if anything over tyred and the cars handle better with a thinner tyre. I personally think my six handles better with the 225 width tyres then with the 235/45/zr17 that i had on before although these handled 50% better then the previous metric rubbish. If you wanted to run a 245 width tyre you would probable have to go down to an aspect ratio of 45. IE 245/45/ZR16.

Out of interest what 7 series model have the tyres come from. Is it a late e32 or the newer model as if its a newer model i am not sure if these wheels are the same offset.

I'll stick my question in here rather than starting a new thread, since its relevent.

My 635 is an 1981, and is therefore pre-TRX. It still has the original 14" BBS wheels with period rubber. I've just bought (ebay) a set of 16" BBS crossspokes from an M635, but they are rims only.

I'm going to go for 225/50 for the rubber, but what do you recon about the finish of the Rims? They are going to be referbished, but should I go for standard powdercoat or polished?.

rim finish is personal choice; polished looks nice, but is impossible to keep good in the winter when there  is salt on the roads unless you wash clean the wheels after every drive.

Just out of interest how far out were the E38 wheels??

cheers

Its true that I don't know what they were on originally, but they came from a guy breaking a knakered M635 (bought his steering wheel as well to replace my 'Bus' wheel).  Here is a picture to see if that sheds any light. Currently got two wearing 205/55 and two with 225/50.

I'm gussing they could be after market add ons, as they have BBS centres rather than BMW ones.

Should suit me fine though, since they are the same pattern as my current 14" wheels, and recently came off a 6 so should fit fine.

                  Those wheels were originally fitted on south african e23 745s (24valve) and are very rare.  Obviously being a BBS wheel they could have been bought aftermarket as well.. The tyre sizes as fitted are correct. Hopefully you got the bolts as well as i'm sure they are longer than standard.

Longer than standard bolts. Why is nothing easy?

Thanks for the help guys.

Jimbob wrote: Longer than standard bolts. Why is nothing easy?

You bought a Six, and expect it to be easy????

Heh,

I expected Rot, bad fuel consumtion, big service bills, difficulty in getting parts, many many hours of cleaning... but "longer than standard bolts"!!! thats just taking the p***!

Can't say I'm suprised though!

Hiabboy- I am in awe (mixed with a certain amount of concern at how you might spend most of your spare time) over your wheel recognition skills. We're not worthy! etc etc...

cheers

p.s. rimstock will sell you unfeasibly long wheel bolts (together with some spacers that are not the right size (74mm male spigot), but can be turned down to fit if required.)

Brucey wrote: Hiabboy- I am in awe (mixed with a certain amount of concern ....

What, only a certain amount???

           I have a confession to make, i know what they are because i have a set !, salted away in one of my sheds. I'm debating whether to fit them or the 16" BBS splits to my 745i (turbo), alas i need bolts as well.

Jimbob wrote: Anyone want an M635 steering wheel?

Yeah, alright so!

Thanks awfully for all the info boys, everything you've said has now been confirmed! Steering Wheel wont fit, and nuts are too short.

A guy I work with used to be a tool maker for Bae, and has offered to make me the required nuts from scratch. Obviously I'm intrigued to find out what standard these might come out at, but I will be sure to let you know...

Wheels with that offset would fit at the rear (I think), but may need spacers at the front (I think). However the tyre aspect rato would be too small and so would put the speedo out. Good for acceleration bad for top speed and fuel economy.

James

timausten wrote: ....does anyone know if the following would fit on my M635 1987 - ET24 16"x8" with 225/40 on the front and 245/45 on the rear would there be any clearance problems etc ?

Are you not allowed a test fit? 8x16 sounds like an Alpina alloy....

You do know your wheels ! But question sorted now I think, found some info on the web.

timausten wrote: You do know your wheels !

No comment

X2 255/40/17

X2 235/45/17

timausten wrote: Does anyone know if, 255/40/17 will fit my 6 ?  X2 255/40/17 X2 235/45/17

You are a glutton for punishment, so!

235/45/17 will fit

255/40/17 may give you rubbing issues in front.....

I've got Alpinas on my M6. 8" x 16" on the back and 7" x 16" on the front (8" were too wide for the front) Still got the original wheels and 4 almost new TRX's for originality purposes.

I also have another two 16" x 8" Alpinas, brand new with centre caps, if anyone is looking.

Steve.

AndyS wrote: A slightly nose down stance is preferable to slightly nose up if you want to keep high speed stability.

For looks as well, IMO. Its important to keep close to the original total hight for the speedo etc - but is that front or back?

Sossy my mistake, I have 235/40/17 to the front & 255/35/17 on the rear which are as close as you can get to the circumference of what was on.

By the way I have four as new standard wheels with brand new Michelin metrics if anyone is interested.

On a seperate note I have found a supplier in Germany who has plenty of BMW part mudflaps.

http://www.wallothnesch.com - www.wallothnesch.com

AndyS wrote: ....Were your TRX's the older 390 diameter?

I asked. They weren't.

AndyS wrote: Well there you go then.

Yup

*sigh*

Cheers Graham, I.ve just read through the posts again & I think it quite understandable for someone to get mixed up.

I am sure 235/45/17 & 255/40/17 are as near as damm it the same circumference. If you go to the millimeter I should have gone for 225/45/17 to the front, but because I was replacing 240 width tyres I went for the size closest.