Hey guys,

I just have a curious question, with rims like the BBS LM's what affects the amount of dish more, the offset or the width or is it a combination of both?

For example, does a 18x9.5 +38 BBS LM have more or less dish than an 18x10+50?

 

It is a combination of both. Normally a lower offset wheel with have a deeper dish and more lip.

 

This. With a 3 piece wheel the entire face of the wheels moves inward the lower the offset which in turn makes the lip wider. The width also effect it this way because the center line of the wheel is different which is what offset is based on.

 

Assuming that both wheels have the same disk (center) structure, 18x9.5 +38 will have more "dish" than a 18x10+50. 6.35mm to be exact.

Which brings us to another point, pretty much all high end three piece wheel manufacturers offer different disk types for their wheels, allowing the wheel to be customized further than simply diameter, width and offset. By choosing the correct disk, you can maximize "lip" while ensuring that you have enough brake clearance. The higher the disk profile, the more material is between the "spokes" and the mounting surface (the part of the wheel that physically touches your rotor), this definitely affects lip size regardless of the size and offset (for example the SSR Professor SP1 is available in 18x9.5 +55 with both SL and NR disks, with 67mm and 54mm of lip respectively). Just another thing thats good to know when shopping for wheels.

More Japan had a nifty video that explained this: http://www.more-japan.com/blogs/2011...ssr-disk-type/

 

Thank your for the replies.

I can understand all that you have said, but every photo I seem to look at seems to show that an 18x10 +50 still has more dish/lip than an 18x9.5 +38. Am I seeing things or is there something I'm missing? I'd be safe in assuming all the 5x114 faces are the same in terms of width right?