Doc's 280

Tomohawk, Ponchovisa You can calculate the overall tire diameter in inches using the following formula: (section width X aspect ratio X 2)/25.4 + wheel diameter(in inches)= diameter For example: 195/70R14 would be: (195 X .7(or 70%)X 2(both sides of tire))/25.4(mm per inch) + 14 = 24.748" You can use this formula to compare any wheel/tire combination you are considering. (Width, offset and backspacing also need to be considered.) Hope this helps, Doc.

Scroll down on the Ansen Sprint page: 15X7, 4X4.5" is available also.

I've been reading a lot of threads about wheel sizes, offsets, tire sizes etc. I'm no engineer (maybe someone out there is and can shed some light on this issue), but isn't the matter of safety and stress on the hub a question of where the centerline of the wheel is and not whether the wheel has negative or positive offset? For example: If I choose to go with a 17" X 7" wheel that has a +40mm offset but space it out 40mm, isn't the centerline of the wheel effectively at zero offset? As a result, aren't the stresses located at the same point as with a zero offset wheel? I can understand that if you take a zero offset wheel and space it out 40mm, you will be moving the centerline of the wheel out and adding leverage stress to the mounting point. Am I missing something? I know MSA sells lots of wheels with spacer kits and claims it is perfectly OK yet there have been several threads that suggest this is not a good idea. Does anyone have the definitive answer? Thanks.

Does anyone know what kind of wheel this is:http://devnulled.com/gallery/albums/280Z-presale/28_3.jpg Thanks.