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relvis
06-04-2009, 09:51 PM
Can someone please help me understand offset? I have a 2007 speed3 and i am really stoked on these wheels, Mrr gt1's , and the shop i am going through can only get them in 18x8.5 with a 38 offset, he said he might be able to get them in 18x7.5 with a 38 offset, i am gong to wrap them in 225/40/18, and i am also going to lower the car with H&R sport springs, i have read in a few forums that with 18x8 with a 45 offset and 225/40/18 tires on a speed3 with H&R sport springs that there will be no rubbing issues in the back, so i am just wondering with the setup i explained will i have issues, i don't mind if i have to roll the fenders a bit, but don't want to get to out of hand with it, please let me know, thanks alot guys
mr_mazda329
06-04-2009, 10:22 PM
The lower the offset number, the more the wheels sticks out from the wheel center. 18x8 +45 is safe for our cars.


http://www.gtsparkplugs.com/images/WheelOffset5.gif


Hope that helps.
MikeHTally
06-04-2009, 10:40 PM
Stock offset is +52.5. +38 sounds a bit iffy.
relvis
06-06-2009, 12:26 PM
I ended up getting MRR GT1's 18x7.5 with a 48 offset, and the tires are 225/40/18, will this set up rub in the rear quarters with H&R springs, they are in the mail as well, thanks for your help
Wastegate13
06-06-2009, 01:58 PM
I ended up getting MRR GT1's 18x7.5 with a 48 offset, and the tires are 225/40/18, will this set up rub in the rear quarters with H&R springs, they are in the mail as well, thanks for your help


You mentioned +38 in your first post for the 7.5" wheel. Now you are saying it is +48. If +48 is wrong please update. A 225 on a +48 wheel will be 9.5mm closer to the fender. I am running a 215 on a +40 wheel which makes me 12.5mm closer to the fender and I have never rubbed. I am on coilovers however. You should be fine.
mr_mazda329
06-06-2009, 03:00 PM
With +48...your good. With +38....you should still be good since its only a 7.5'' wheel
relvis
06-07-2009, 11:49 PM
I ended up buying a set of MRR GT1's which are 18x7.5 with a 48 offset, and a set of falken FK452 in 225/40/18, H&R springs are in the mail, super stoked to get it all installed, i apreciate the quick replys.
Wastegate13
06-07-2009, 11:57 PM
Looks good. I like mesh wheels. Take some installed pics.