Thanks. At some point the goal is to build wide ( 10 or 11" ) 18" wheels so I can burn take off racing slicks on my other SL R129 and I need non rusted centers.

The aluminum wheel route has few options unless I go with custom builds that will be more $ than I've spent on my last few race cars. Steel wheels will be just fine as I can also set my offset to the car, it is going to be a tight squeeze.

The R129 has come with a few 18" options

Front 8 , rear 9 ( 97 SL Sport AMG monoblock thick spokes )

Front 8.5 rear 9.5 ( 98 SL Sport AMG monoblock thin spoke )

Front 8.5 rear 10 ( 01-02 SL600 AMG 2 piece monoblock thick spoke )

It is a toss up between widening R class spares ( 6.5 x 18 " ) or cutting centers from the more common ML ( 4 x 18" ) and using shells that have already been widened.