tyre conversion chart???

[shaggy]

i have 195 60 r15 tyres on OZ wheels i dont like the wheels but may have chance of some merc 16 inch wheels off a e class minus the tyres so was wondering if there is an EASY conversion to see what tyres i need i have the esprit model and dont want the ride to suffer so want the deepest tyres i can get and dont want to knock the speedo out so do i get 195 60 r 16 or will they be an inch bigger and catch the arches im confused:!:

 

[davidsl500]

195x55x16 Shaggy. This will give you a rolling radius of 310.45mm against your present 307.50 which is within 0.96% of the originals. This slightly higher rolling radius would mean that at 70mph you would really be doing 70.67mph so no great problems there.

As you go up on the diameter of the wheels the profile has to reduce to get the overall diameter the same. From the profile figure you can calculate the "height" of the tyre (from rim to tread).

e.g If you take a tyre that is 200x50x15 then the width of the tyre would be 200mm and the height of the tyre would be 50% of 200mm = 100mm say 4"

SO the total diameter of the wheel and tyre would be 15" + 4" + 4" = 23"

Now working from this, if you went to 16" wheels then to keep the overall diameter of 23" you would have to have an inch less height of rubber = 23" - 16" = 7" (3.5" of rubber top and bottom = 89mm decimal

So if you keep the width at 200mm and the height of the rubber must be 89mm then the profile must be (89/200)x100 = 45% So in this case you would order 200x45x16.

Note that if you go up on the width of a tyre then you must decrease the profile further since the tyre height is a percentage of the width.

Got it now ??

NB Just as important - Check that the wheel ET figure is correct IE whats the Inset / Offset on the C and E Classes?

 

[pascal]

You cannot put them on without spacers if there from the W124 ET41, and they should not be more than 7J.

The ET for your car with 7J or 6.5J is ET37 the same as
The ET of the W210 EClass with 7J is ET37 and they will be just fine with 205/60

If they are 7.5J, MB recomends body modification to fit on front.

Basically, we need more information to as the actual wheels (J width, and Whether from W124 or W210 (or ET no. will do))


The Oz wheels you had should have had 195/65 /15 on 15" rims.

 

[shaggy]

i dont know the ET number these are wheels which have been part exchanged at a wheel shop and he says they will fit.they are like new he wants £250 for 5

to be honest i would just love some normal 15" original merc wheels but cant find any at the right price or condition so was toying with the idea of moving up to 16"
the five tyres i have on the oz wheels now are 90% good so would save me £££s if i could get 15"
ive searched and get confused as to which are genuine merc and 'copys'

 

[pascal]

Et is stamped on the inside. Also is J no (or you can use a tape measure).

What style are they. Look at thread 'Wheels Wheels Wheels' below and point them out.
Will he not take yours as a trade?

 

[shaggy]

Et is stamped on the inside. Also is J no (or you can use a tape measure).

What style are they. Look at thread 'Wheels Wheels Wheels' below and point them out.
Will he not take yours as a trade?

amg composite with all the rivets round the rim he dont want mine in px but has told me today they are not original merc wheels but copys and says he can do me the same in 15" for about £500 with new named tyres so im going to wait till i run the tyres on these wheels down first and get a bit of spare cash as the wife wanted new oak flooring in kitchen and dining room so my cash has all gone at the moment:-(

 

[pascal]

Pine? Mrs Shaggy?

If she'll settle for red deal (pine), you may be able to get them quicker Shaggy

 

[shaggy]

too late:x i tried to get her to like laminate but she wouldn't go for it so ive bought the proper stuff and now SHE has to get someone to fit it lol

im no diy-er

anyway that gives me more time to research my wheels and decide what im going for

 

[pascal]

I have a list of all MB wheels available in 97 (posted in below http://forums.mercedesclub.org.uk/showthread.php?t=10495 ), so give us a shout when the time comes.

PS. I'd do your floor for you only its too far a drive , unless you want to collect me in the bosses car.:-D

 

[tom7035]

I'd give her a slap shaggy and go get your wheels!

(P.S. This was posted by someone else using my ID)

 

[shaggy]

I have a list of all MB wheels available in 97 (posted in below http://forums.mercedesclub.org.uk/showthread.php?t=10495 ), so give us a shout when the time comes.

PS. I'd do your floor for you only its too far a drive , unless you want to collect me in the bosses car.

my boss is in dubai for a week (£10k flights & hotel) so i thought i had the car only to find the other director's car had broken down (03 range rover diesel) so had to lend him the 55 but am picking him up from heathrow next sunday otherwise i could nip to ireland pick you up floor done in 2 days drop you back off, few guiness back home boss none the wiser,fuel card hammered, could just say there was a small leak on petrol tank and had to nip to ireland twice to fix it
could work you know lol

I'd give her a slap shaggy and go get your wheels!

(P.S. This was posted by someone else using my ID)

that could also work :razz:
any chance you could come and sort it for me im a bit of a coward that way but you seem very brave and i dont care if she kills you lol

 

[Bolide]

Wheel sizes

I've got a wheel diameter / tyre profile calculator on my other website:

http://www.bolide.co.uk/actions/info.taf?page=tyresizecalculator

- it lets you compare two wheel/tyre setups to get a similar rolling radius

Offsets are a little bit more complex to calculate but the backspacing (ie the inset of the inner face of the wheel from the mounting flange of the hub) shouldn't increase as the wheel width goes up or the tyre inner edge is likely to foul the suspension leg

Bear in mind that 16" isn't a popular tyre size any more


Nick Froome
www.w124.co.uk

 

[shaggy]

nice thank you:mrgreen:

 

[shaggy]

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=10398&item=4548658812&rd=1

i like these would they fit straight on?

 

[pascal]

MB list say that body modification is required on front with 7.5 wheels.

For your car, Shaggy, you should be looking at 7J width with an et of 37.

Pascal

 

[shaggy]

cheers pascal