Burger
Active Member
- Joined
- Sep 13, 2010
- Messages
- 862
- Car
- 2007 SL (R230)
Whenever I see people on here talking about wheels, as well as the wheel rim width and diameter they mention another number that appears to be important... ET? I gather, I think, it is the offset of the inner face of the hub mounting... but I'm not sure. Could someone please explain?
Also, then, when looking at wheels for my car, how can I possibly know what this number needs to be?
My car is currently fitted with 8.5J x 18 fronts and 9.5J x 18 rears (what does the J stand for?). The car when new would have been standard with 8.5J x 17's all round. If I decided to fit 17 inch wheels for winter, same size all round, what would this third mystical number be? The offset one? Then, knowing that, am I restricted to wheels designed specifically for the SL or would 8.5J x 17 inch wheels from other models be identical?
Sorry, lot's of questions, but it's an area I find quite mind boggling when you see how many wheels are available and one I don't understand at all.
Thank you.
Also, then, when looking at wheels for my car, how can I possibly know what this number needs to be?
My car is currently fitted with 8.5J x 18 fronts and 9.5J x 18 rears (what does the J stand for?). The car when new would have been standard with 8.5J x 17's all round. If I decided to fit 17 inch wheels for winter, same size all round, what would this third mystical number be? The offset one? Then, knowing that, am I restricted to wheels designed specifically for the SL or would 8.5J x 17 inch wheels from other models be identical?
Sorry, lot's of questions, but it's an area I find quite mind boggling when you see how many wheels are available and one I don't understand at all.
Thank you.