What's the biggest offset I could do on the crossfire without messing up suspension. I'm looking at tsw snetterton and want a little bit bigger lip than crosscar has but I'm not sure what the whole offset thing is

 

On the fronts, stick with an 8-8.5" wide wheel and as close to 32mm as you can get.

Anything numerically lower than a +32mm offset (30, for instance) will push the wheel out further and further from the suspension. This is great (to a point) but you will eventually run into interference with the fender during articulation.

Anything numerically higher than a +32mm offset in the front (35, 40, etc) will cause the wheel to sit inside too far and the inside sidewall of the tire risks contact with the upper suspension nut.

On the rears, the factory offset is +22mm on a 9" wheel.

Most TSW 19x9.5 wheels are +35 mm offest. This is doable, but your wheel will appear to be "tucked" into the fender. A 10mm Eibach/H&R spacer would fix this beautifully. Some TSW rims are cool enough to provide a +25 mm offset.

A 19x10" wheel can be run but the offset needs to be between +20mm and +25mm... So, a 19x10 +35mm offset can be used so long as you pair it with a 10-15mm spacer. The tire width on the rear will be the limiting factor. A 275 on a 10" rim could likely be pushed out to the +20mm range with no interference on the fender lip. A 285/295 might require you to stay closer to +25mm overall.

Last but not least, I'm sure you discovered that "lip size" is entirely dependant upon the style of the wheel, and the manufacturer.

My Mandrus wheels, for instance, are 19x9.5 with a +25mm offset. However, the lip is only 1.75"... The spokes on the Wilhelm come out further to accompany the wide 4-piston calipers on the Mercedes SL (what this wheel was built for, given the size/offset). The TSW Willow, Snetterton, etc all have a 3" rear lip because the offset (+35mm) is geared towards a different model and there's no need to clear larger calipers, therefore the wheel's spokes can be styled more aggressively, allowing for a bigger lip.

In your situation, if you don't plan on upgrading the rear calipers to the AMG 4-pots, your setup for widest lip/best fitment would be a 19x9.5 +35mm offset TSW (or comparable) wheel with the 3" lip, and a 10mm hub-centric spacer.

Hope this helps.

 

sorry double post...

 

i might be wrong (usually am) but i thought the fronts were 35mm offset...

 

OEM is 18"x7.5" +35mm offset, you're correct.

I wouldn't recommend a 35mm front offset with 8.5" wheels though, due to the suspension nut. If it wasn't for that thing, you would have considerably more options.

 

Front: 18x8, 35 offset, no spacer. Lip=1.37in. Can't go much less-brakes get in the way.
Rear: 19x9.5, 32 offset, 12mm spacer. Lip=2.65in. Could go a little lower, but these were just too gorgeous to pass on for a 1/4in. more lip.

 

Wow could you attatch more pics please! From the side, front, etc.

 

I am in the same situation right now trying to find a wheel combo that I like and that fits. I really like the Tenzo concept 9's but aren't offered in a 10" width or in a 20" height.

I am now onto the TSW Max's and the manufacturer is saying that the rear 20"X10" with 40mm offset will rub on the outer fender.

I used the wheel/tire fitment tool in the sticky and I am showing different than what TSW is saying. I am showing that with the 20"X10" with 40 mm offset i would also need a 5mm spacer since ideally the offset should be 35mm.

I posted the links below with what I have found for stock vs. the TSW wheels that I would like to use. I would appreciate someone pointing where I am not adding this up correctly. I am taking the stock wheel width (9") and subtracting the backspace to get what could be called frontspace of 79mm. I am trying to keep the same outside diameter and add the extra width of rim (compared to factory) in towards the shock and spring. I don't know if this is the right way or not, just seemd like common sense to me. What I don't know is what clearance I have from the inside of the stock wheel to the closest part of the shock or spring of the xfire suspension..... The more the + offset the more tucked in uder the fenders the wheel will be right?

Will this wheel/tire combo work?

TSW Max 19"X8.5" 43mm offset front and 20"X10" 40 mm offset rear
Wheel-Tiresizecomparer - RIMSnTIRES.com

Stock
http://www.rimsntires.com/specs.jsp?...frontcrossfire

 

Here you go... This was before my paint job.

 

I'd say you may have some trouble with the front. I'm at 18x8 and I scrub when I turn to the lock. An extra inch in height and a half inch in width might be problematic. As for the rear that might be doable. A 20x10 ET40 would have about 10mm more backspacing than my wheels. But it would stick out a little more than mine, about 16mm. A good suspension shop could make it work.(I think)

 

I'm lowered and have 18x10's in the back 25 offset 285 tire and I rub the inside of the tire with the inside roof in the wheel well on full compression. There's a few mm room to the outside. I have 18x9 on the front with a 30 mm offset and it's perfect. No room to the inside or outside with a 245 tire. In my opinion with an 8.5" rim 30 to 32 is the offset you want without spacers. On the rear, with a 10" rim I'd stay real close to 25 offset. If your lowered you may have to put up with a little rubbing.

Les

 

So now I'm asking if I could use an 19x9.5 with a 20 mm offset. ghats the only size I can find in snettertons at the moment. I have a deadline to meet by march 24 and the 35mm would have to be made and would take 90 days to arrive

 

The 19x9.5 +20mm offset would be a great fit. I'm running the same size wheel in a +25mm offset and as Les stated, I have a few more mm's of room to push out. I'd say five would be bang-on.

 

Stock offset is 22 on the rear. A 9.5" rim 20 offset will protrude an additional 8.35 mm towards the inside if you keep the stock 255 tire. My setup with a 285 tire (that rubs a little) protrudes 12 mm (approx) more than stock to the inside and 18 mm (approx) more to the outside. What tire do you intend using? A 20 mm offset and 265 will be equivalent to what I have on the inside. (that rubs a little/lowered)

Les

 

Thanks for all the examples, this is starting to make more sense.

10” wide wheel +20mm offset with 285’s= 17mm out more and 12.5mm in more than a stock wheel.
10” wide wheel +25mm offset with 285’s =12mm out more and 18mm in more than a stock wheel.

So the TSW Max
10” wide wheel +40mm offset with a 20mm spacer= 17mm out more and 12.5mm in more.
If a 20mm spacer is used then it should be equivalent to the +20mm offset right? BUT, is there such a thing as a 20mm spacer and would there be any safety issues?

 

So 20;mm would fit with the oem srt brakes?

 

Yes, if you're referring to the rear wheel...

 

Sure am. And that size won't require a spacer correct?

 

ICHIBA V1 20MM WHEEL SPACER 5X112/66.5 MERCEDES BENZ | eBay

Here's 20 mm hub centric spacers and as you can see they cost around $100. Then you'll need new lug bolts that are 20 mm longer than the stock ones. More money. Be sure to ask what kind of seat the lugs need to have. Stock are ball seat and lots of aftermarket wheels have conical seats. Lots of details to check. I ran with hub centric spacers for a while without problems, but it's preferable to find a wheel that fits without them if possible. Happy wheel hunting.

Les

 

A 20mm rim with a 20mm spacer?