Wheel & tyre size ???
I currently have 17" by 8.5 wheels & 245-45-17 Front 255-45-17 Rear tyres, I would like to put bigger wheels with meaner look, but do not want to ruin the ride quality to much.
I would like to put bigger wheels on & try to keep the profile close to the 45 I currently have!, 'not asking much I know', but any help would be greatly appreciated.
Thanks
Wayne
thanks for info, very helpful, could I run 255 on front with 5mm spacers?,
also I am lead to believe the offset is 35 all round do you know if this is correct.
Thanks
Wayne
You would have to run 255/35/19 or 255/30/20. That is a 26 diameter.
The issue with the 255/30/20 is that you would need to run a 295/25/20 or 305/25/20 rear and that can create a lot of problems depending on where you live with such a low profile tire. Lots of people do it though. Lots of dent rims though.
Brought car with 8.5 all round running 245f & 255r don't know if this is standard.
Looking at a set of wheels on ebay Item 141077232272
Size front 255/35/19 wheel 8.5
Rear 275/30/19 wheel 9.5
Looking at your comments these should fit not sure of offset but seller says wheels will fit CLS ???
Thanks
Wayne
PS yes UK OEM wheels not sure about tyre size
Last edited by waynehyde200665; Sep 30, 2013 at 04:50 PM.
- 275/30/19 diameter is 25.6 which is too small. You can fit a 285/30/19 on that wheel and get a 25.8 diameter to be better. Best would be a 295/30/19 on a 10" wheel to match at a 26" diameter.
Notice that he also doesn't show any pictures of the rear of the wheels. Do not get confused and think that those are OEM. They aren't.. Without knowing the brand they could be complete pieces of garbage and not even be hub centric. Welcome to a world of shimmy with low quality wheels.
He doesn't list the offsets too. The E series offsets are not the same as ours. You will need spacers and longer lugs.
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I would suggest a good quality 19x8.5 et25 and 19x9.5 et20 wheel, hubcentric, with 245/40/19 and 285/35/19.
I thought I'd also ask my wheel questions in this thread without starting a new one. Excuse me waynehyde if you feel i'm hijacking your thread.
I'm looking into getting new wheels as well for my 09 cls with the sport package. I have 255/40 18 in the front and 285/35 18 rears. I'm looking at getting the tsw interlagos set with 18x8.5 32mm offset in the front and 18x9.5 40mm offset in the rear. Does anybody know off hand if these will / won't fit or what I need to alter to make sure I don't have to cut fenders down etc?
Also how much allowance is there in the offset, if any? I know stock is listed as 25mm and 28mm front/rear respectively. Do those numbers have to match up exactly with the new wheels in mind, or how much can i go either way while still ensuring a proper fit. Thanks in advance.
Most agree that OEM offsets (8.5 et25 and 9.5 et28 wheels) stick in a little too much. The rears stick in even more than the front. This is why many go close to et20 to pull them out a bit.
Most agree that OEM offsets (8.5 et25 and 9.5 et28 wheels) stick in a little too much. The rears stick in even more than the front. This is why many go close to et20 to pull them out a bit.
So what offsets should I look for in the wheels since I very recently got the tires and don't really want to spend the cash on changing them out. From your post, 35mm in front and 40mm in rear won't work, correct? Should I be looking for 20mm for front and rear? Again, thanks.
255/40/18 is diameter 26 and is OEM. 18x8.5 et25 is OEM.
285/35/18 is diameter 25.9 and is OEM. 18.9.5 et28 is OEM.
People say that et20 on a 255 tire is absolutely flush. I personally think et25 is good. Whatever suits your taste. 5mm is not a crazy difference.
The rear is a different story. Et28 is way too far in. I went with a 285 tire and went et18 on a 9.5 wheel.
Wait a minute...what wheels are you currently running? If you have 18" OEM then mount the tires, go to a local auto parts store and pay for very cheap $10 or so generic spacers in 5mm, 10mm, etc. and test them until you get the et that you like. Then place your order.
255/40/18 is diameter 26 and is OEM. 18x8.5 et25 is OEM.
285/35/18 is diameter 25.9 and is OEM. 18.9.5 et28 is OEM.
People say that et20 on a 255 tire is absolutely flush. I personally think et25 is good. Whatever suits your taste. 5mm is not a crazy difference.
The rear is a different story. Et28 is way too far in. I went with a 285 tire and went et18 on a 9.5 wheel.
Wait a minute...what wheels are you currently running? If you have 18" OEM then mount the tires, go to a local auto parts store and pay for very cheap $10 or so generic spacers in 5mm, 10mm, etc. and test them until you get the et that you like. Then place your order.
Do you have any links to wheel sets that would match the dimensions you have given? I can't seem to find much with a 20mm front and 28mm rear that would fit but I don't know every single site out there.
And why exactly will I regret those tires? Thanks, you've helped a ton.
- You are backwards on your math on spacers. You have a positive offset 25. If you add a 10mm spacer then you go down in offset so you go to a 15mm. It pulls your wheel out.
- My suggestion is to get cheap 5mm and 10mm spacers and see what you like. Put 5mm on front and 10mm on back which takes you to et20 and et18. Again, remember about the width of the tires(245 vs. 255 for instance) will impact your final decision. Swap around until you are happy.
- When you finally know what offset you like and what tire width you like then you can make a decision on wheel sizes such as 18 x 9.5 vs. 18 x 10.
- I say that you will regret those 18" sizes only because you are ordering new wheels and tires. You have unlimited options. 18" wheels are way too small and not necessary because you can have 245/40/19 and 285/35/19 which gives you a 19" wheel with the same profile that you desire.
- Heck, If I was ordering new....I would even go with a 245/35/20 front. 255/35/20 would be too much diameter without modifications.
Hi Phallacy, no worries, made interesting reading & now I'm more familiar with 'offsets'
Cheers All.
For instance, I bought 245/40/19 Michelin Super Sports and these are meaty tires. They cover a 8.5 wheel and look like a 255. They have a very squared off shoulder which gives the bigger appearance.
Just something else to consider
It will give you insight to diameters and what size wheels fit to the tires.
http://www.michelinman.com/tire-sele...t/tire-details
For instance, I bought 245/40/19 Michelin Super Sports and these are meaty tires. They cover a 8.5 wheel and look like a 255. They have a very squared off shoulder which gives the bigger appearance.
Just something else to consider

Front: If you used a 10mm spacer you would be at et22. That is fine and close to the edge. You get into all sorts of drama with a 5mm spacer not being hub centric(no lip on the spacer) and possible vibrations so I would use a 10mm.
Rear: You will need to use about a 20mm spacer to get to et20 to match the front. With a 285 tire and your et22 front some might say use a 25mm spacer. I would have to see it.
You are going to be surprised how much those spacers and lug bolts cost. I paid $100 for 10mm H&R spacers. Call them too and see what the minimum hubcentric(with lip) spacers fit the front of our cars. It is different than the rear.
I know that I keep saying it but unless you are getting a deal on those wheels and tires, return the tires and get a set of 19" or 20" wheels that fit without spacers. Google Discount Tire Mandrus wheels.
Front: If you used a 10mm spacer you would be at et22. That is fine and close to the edge. You get into all sorts of drama with a 5mm spacer not being hub centric(no lip on the spacer) and possible vibrations so I would use a 10mm.
Rear: You will need to use about a 20mm spacer to get to et20 to match the front. With a 285 tire and your et22 front some might say use a 25mm spacer. I would have to see it.
You are going to be surprised how much those spacers and lug bolts cost. I paid $100 for 10mm H&R spacers. Call them too and see what the minimum hubcentric(with lip) spacers fit the front of our cars. It is different than the rear.
I know that I keep saying it but unless you are getting a deal on those wheels and tires, return the tires and get a set of 19" or 20" wheels that fit without spacers. Google Discount Tire Mandrus wheels.
http://www.ebay.com/itm/Mercedes-Ben...-/181227339479
There is a reason why H&R has different part numbers for front and back.
DR10mm3 18 Front Only20556659$99.95 Pair







