Tyre sizes.

jfb1977 · 08-06-2008

Hi all,

I've got my eyes on a set of replica AMG wheels (the real ones are just TOO much dosh!!) but wanted some advice.

My car is in at the dealer as I type having a minor audio repair, so I can't go and look.

Are the stock 17 inch wheels the same width front and rear?

The reason I ask is that the wheels I'm looking at are 8.5JX18" ET35 PCD 5X112 - all four of them being the same size.

Is this ok?

And then if that IS ok, what size tyres will I need to fit these wheels and (again) will the tyres be the same size front and back?

Cheers.

jfb1977 · 08-11-2008

^^^BUMP^^^

Anyone?

**etyu** · 08-11-2008

PM Ynot. I don't know if the 8.5 width will cause rubbing in the front. IIRC the off set of the OEM is 37mm.

**Bernd js** · 08-11-2008

Hi,

I saw this question only today:
The 171 usually has different tyre and rim sizes at the front and rear axle. But it's allowed to drive the small size at the rear axle, too, but it does not look that well.
The recommended sizes by Mercedes are:

7,5 x17 ET36 or ET37 with 225/45 front (and rear)
8,5 x17 ET30 or ET34 with 245/40 only rear

7,5 x18 ET36 or ET37 with 225/40 front (and rear)
8,5 x18 ET30 or ET34 with 245/35 only rear

I think the rims are okay only for the rear, but might get tight in the inner wheelhouse. E.g.: I drive the stock AMG rims 8,5 x18 ET30 with 255/35 tyres at the rear.

**Ynot** · 08-12-2008

Quote:

Originally Posted by Bernd js

Hi,

I saw this question only today:
The 171 usually has different tyre and rim sizes at the front and rear axle. But it's allowed to drive the small size at the rear axle, too, but it does not look that well.
The recommended sizes by Mercedes are:

7,5 x17 ET36 or ET37 with 225/45 front (and rear)
8,5 x17 ET30 or ET34 with 245/40 only rear

7,5 x18 ET36 or ET37 with 225/40 front (and rear)
8,5 x18 ET30 or ET34 with 245/35 only rear

I think the rims are okay only for the rear, but might get tight in the inner wheelhouse. E.g.: I drive the stock AMG rims 8,5 x18 ET30 with 255/35 tyres at the rear.

I agree, the front might have rubbing issues.

08-06-2008	#1 (permalink)
jfb1977 SLK World Member Join Date: Jul 2008 Location: Surrey Vehicle: Black with black 2005 SLK350. Roof module, chrome door pins, AMG bonnet vents, R170 antenna. Posts: 26 Country: Thanks: 2 Thanked 3 Times in 2 Posts	Tyre sizes. Hi all, I've got my eyes on a set of replica AMG wheels (the real ones are just TOO much dosh!!) but wanted some advice. My car is in at the dealer as I type having a minor audio repair, so I can't go and look. Are the stock 17 inch wheels the same width front and rear? The reason I ask is that the wheels I'm looking at are 8.5JX18" ET35 PCD 5X112 - all four of them being the same size. Is this ok? And then if that IS ok, what size tyres will I need to fit these wheels and (again) will the tyres be the same size front and back? Cheers.

08-11-2008	#3 (permalink)
etyu Founding Member #2 / Ambassador Of Good Will Join Date: Jun 2006 Location: Orange County, CA Vehicle: 2008 SLK 55 Posts: 5,279 Country: Thanks: 376 Thanked 277 Times in 168 Posts	PM Ynot. I don't know if the 8.5 width will cause rubbing in the front. IIRC the off set of the OEM is 37mm. __________________ *Eddy* To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Pewter/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package Designo Black Leather Cover on e-brake handle, ( To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Bill T), SmartTop v1.0, Kleyman 3BFM (NoRegret Custom), Green Air Filters, *Mod. R170 ant.*, EuroClear sidemarkers w/PIAA PlasmaIon lamps, chromed front & rear turn indicator lamps, PIAA SuperPlasmaGTX front parking lamps, bilateral rear fog lamps enabled.

08-11-2008	#4 (permalink)
Bernd js Senior SLK World Member Join Date: Nov 2006 Location: Bremen Vehicle: 2006 SLK 350 AMG Package Other Toys: watches, C43 AMG Posts: 186 Country: Thanks: 9 Thanked 13 Times in 7 Posts	Hi, I saw this question only today: The 171 usually has different tyre and rim sizes at the front and rear axle. But it's allowed to drive the small size at the rear axle, too, but it does not look that well. The recommended sizes by Mercedes are: 7,5 x17 ET36 or ET37 with 225/45 front (and rear) 8,5 x17 ET30 or ET34 with 245/40 only rear 7,5 x18 ET36 or ET37 with 225/40 front (and rear) 8,5 x18 ET30 or ET34 with 245/35 only rear I think the rims are okay only for the rear, but might get tight in the inner wheelhouse. E.g.: I drive the stock AMG rims 8,5 x18 ET30 with 255/35 tyres at the rear. __________________ To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

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08-11-2008	#2 (permalink)
jfb1977 SLK World Member Join Date: Jul 2008 Location: Surrey Vehicle: Black with black 2005 SLK350. Roof module, chrome door pins, AMG bonnet vents, R170 antenna. Posts: 26 Country: Thanks: 2 Thanked 3 Times in 2 Posts	^^^BUMP^^^ Anyone?

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