They're available in a number of places.. The repro's even seem to be decent..balence out OK etc.. Plus, they're cheap enough that if you bend one you can replace it for less then the cost of straightening etc..
I'm going to get 8 hole 16" rims as well. The cost of some of the other new wheels are just too much. I'd rather invest the difference into getting my 126 running as near to perfect as possible. I also can save money on having to get new tires when the time is necessary.
I have 8-hole 16" rims on my '87 560SEL and love them. Mine are chrome aftermarket rims, 8" wide, and with 225/50/16s on front and 245/55/16s on the back, the car looks much better than it did with the stock 15-hole 7" wide rims.
One thing to be careful about, I put on spacers to get the tires out to the edge of the wheel wells and it took me a while to figure out how to get the vibrations to stop. It turns out that the hubcentric spacers weren't fitting well enough in the rims and let the rims go on the car just a little off center. A .010" shim added around the hub on the spacers got the rims centered on the spacers and all the vibrations are gone. Works fine but I believe the shims would drive the Germans (TUV?) crazy. Works for me though.
I've never heard anything good about a spacer that is bolted onto the hub and the wheel is bolted to the spacer using another set of bolts - too many bolts involved and a possibility of flex then failure in the spacer under hard use. These might be satisfactory for the thicker widths, but 15mm and less thickness spacers would take some extremely good metal to not fail under normal use unless it is something as heavy and strong as steel.
I like using proper strength longer bolts and a good quality spacer, the job's done with five bolts. I could be wrong (again), so.... enlighten me!
FYI, here's a photo of my '87 560SEL with 8-hole 8x16"rims, using 5mm spacers on the front and 20mm spacers on the back. The front suspension has been lowered.
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