I have a 2000 honda civic si. I believe factory specifications are 15x6. 4x100mm. And a +45 offset. I am about to purchase these rims. Buddy club p1 sf in matte black. I would like them wider than 6 inches though. I would prefer 8 inches. How does this affect the offset. I could use all the help. I can get in understanding these numbers better. Thanks everybody!.