15" Rial mesh wheel lug bolt/nut size

[Hamad500]

Hello guys,

i just bought these Rial wheels for my dad's stock 82 500SEC(euro spec) , couldn't find any info on the correct lug nut/bolt size and spec , since these are considered aftermarket , would the lugs differ from the standard Mercedes size?

Wheels are aluminum 7x15 et23.3 offset all around , 66.6mm center caps

Best regards,
Hamad

[Frank Reiner]

At the risk of suggesting anything that would cause you to get your hands dirty:
1) Remove an existing wheel from the car.
2) Observe the length of bolt threads exposed to the inside.
3) Insert the same bolt in the replacement wheel, and observe the length of exposed threads.
4) Is a different length bolt required?

[Hamad500]

Thanks alot Frank , will try and find out.

Regards,
Hamad