Final Word on Fitting BBS RS to a 560sl / Gen2 r107:
Flat face wheels:
like rs008, rs009, rs011, rs023 - require a 15mm spacer to fit. Maybe as small as 13mm would be OK, which might provide more 8x16 et11 fits. But I haven't actually tested a 13mm spacer.
Curved face wheels:
Like rs098 - require 19mm of spacer as tested today. 20mm would be the spacer size required for these.
The ones made for 560sl:
Like rs133 - have a 10mm spacer built in which is screwed to the wheel.
With this information, if you don't want to extend beyond that of an 8x16 et11, you would need to cut it very close to use anything other than a 1" lip. 1.5" lip is the max with a 225/50/16 wheel on the front of a 560sl.
Flat face w 6" barrel and 1.5" lip --> 8x16 et24 --> 13 spacer --> 8x16 et11 (if you can find a 13mm spacer. 1m spacer is et9.) Since 15mm spacer is most common, 1" lip is really the max I think, unless you think 8x16 et9 is Ok.
Curved face w 6" barrel and 1.5" lip --> 8x16 et35. --> 20mm spacer --> 8x16 et15. There is only about 4mm to spare and 1/2" would be too much front space if you stepped up to a 1".
Rs133 w 6.5" barrels and 1.0" lips are 8x16 et21. Putting bigger lips on these is pushing it. If you were to try to make an 8" wheel with a 1.5" lip and 6" barrels, you'd have 8x16 et8-9. That is very similar to 15mm spacers on the flat face wheels mentioned above. Going for 8.5" fronts would pull the offset back to about et15 which should center the tread enough to stop the rubbing. I think this is what Pearson has, 8.5x16 et15. I assume he will be using 225/50/16 tires on them and be in good shape.
So it just doesn't look to me like there are any bbs rs wheels that would allow you to run 2" lips on the front of a 560sl. The closest would be the curved face rs098.
So congrats to the member who says he is purchasing my rs098. You could use the 1.5" lips on the front with 20mm spacers, especially if you swap out the 5.5" barrels for 6" which will pull the tread inward on 225/50/16 tires. Of course it is an option to run 205 or 215 tires too. 7.5x16 et8 will certainly work with those skinnier tires, but might make the suspension slightly softer with the lower offset and being a little short on backspace. The 1" lips coming with the set might be replaced with 3" lips for some nice 9x16 et10 wheels on the back. Until upgrading the 1" lips to 3", the 1" lips would look good with 20mm spacers on all four corners and 1.5" lips on the back. I can't wait to see them on the car!
They are here, ready for pickup.
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