irokdastar

I am looking at a set of 19" wheels for my 2004 clk500 I got the bolt pattern and bore size but I am having an issue with the offset . I know my 17 offset are 37 and 35 but if I go with 18 " or 19" wheels do I still need to find the same offset? Thanks for the help

beejAMG

wheel offsets are basically if you want your wheels to stick out or push in. if youre happy with your current offset settings then stick with what you have, if you want the wheels to stick out or push in then play with the offsets.

irokdastar

Ok I thought that the larger you go the offset changes. No I like my stock look. My main concern is my car has the larger brakes and I want to make sure they clear

beejAMG

the offset remains the same. unless you go from stock 16 to 20 then you may have the front strut to clear but otherwise youre good.

Yidney

Would you be going wider in addition to larger? If so, then you will have to address offset.

irokdastar

I am going from the stock 17 staggard to 19x8 front and 19x9 rear or 19x8.5 front and 19x 9.5 . I just Called a wheel place they suggested 30 offset for the front and 36 for the rear for 8.5 and 9.5 . I am getting confused .

beejAMG

+1 on what Yidney mentioned, totally slipped me that you might go with wider wheels.

i reckon the measurements from the tyre shop is better. will prolly give it a more aggressive look without rubbing. but if you really want the exact same look only bigger wheels. tell the guy exactly what you want and what you currently have and tell him to calculate the right offsets.

Yidney

Take 1/2 the increased width, and that is the difference in offset you need. So if you are increasing width by 1 inch, half that is 1/2 inch, or 12-13 mm. So if you have 40 offset now, you need 28 - or close to that. You need less offset, not more, because you need to move the wheel out to compensate for the increased width. Whether you actually need to fully compensate depends on how close your tires come to your struts now. If they clear by 10mm, then only 5mm may be enough, so you may have some leeway. But you also need to deal with the brake clearance. So look at that and see how much clearance you have now.

Yidney

Also, keep in mind that clearance of your brake calipers is not necessarily related to offset, but is also a function of wheel design. Offset is simply a measurement of the distance between the centerline of the wheel and the flat mounting surface of the wheel. But theoretically, offset says nothing about the the spokes that connect the flat mounting surface to the outer rim of the wheel. Theoretically, you could have spokes that hit the calipers regardless of offset, or spokes that clear the calipers regardless of offset.