• Protip: Profile posts are public! Use Conversations to message other members privately. Everyone can see the content of a profile post.

Specific offset help needed

Joined
26 January 2002
Messages
314
Location
In the middle
Ok you wheel guru's out there, I'm looking at new wheels for my X. What is the difference between wheels that are 17x7.5 ET38 and a 17x8 ET40 and how might they look different once mounted?

Thanks for your help!
 
RACERnsX said:
Ok you wheel guru's out there, I'm looking at new wheels for my X. What is the difference between wheels that are 17x7.5 ET38 and a 17x8 ET40 and how might they look different once mounted?

Thanks for your help!



A 17x8.0 +40mm will have the edge of the rim be "in" about 5mm from the fender from this pic. A 17x7.5 first of all have the outer edge be "in" 6.35mm with the exact same offset as an 8" rim, due to it being 1/4" narrower on each side. Now factor in 2mm lower offset, and it will bring it back "out" 2mm thus netting 4.35mm furthur "in" than the 17x8.0 +40. NOTE this is ONLY where the rim edge will be.

If you run the same 215 tire, the rim edge doesn't make much of a difference as to where the tire edge will sit. With the same tire, a +40 8"rim and a +38 7.5" rim, will only "look" 2mm different as far as the tire edge goes. The +38 will be "out" 2mm furthur to the fender than the 8" +40mm.

My guideline is to run a 17x8.0 +35mm to put the edge of the tire out to the fender as you can see in this pic.

17x8.0 Volk GT-C +35mm 215-40-17 tire
 

Attachments

  • Mar06221.JPG
    Mar06221.JPG
    92.5 KB · Views: 149
Back
Top