offset vs tire size

I have an 04 350Z. i want to get new wheels. the offset is 30mm with 245/45/R18 (R) and 225/45/R18 (F). the wheels i like are either 25 or 35 offset. what happens with either choice concerning performance, handling, etc? Do I need to change tire size if I switch to different offset? I know very little about this topic. Please help. I am anxious to make the change.

 

You may need to change tire size depending on the width of the new wheels? Are you getting 18" aftermarket wheels?

 

offset doesnt mean anything without knowing width.

my friend is putting 18x10's on his Z33 with some 235/40-18's in the rear. front is getting 215/40-17 on 17x8.5 (i believe). ill talk to him tomorrow. i dont remember what fits the Z33.

 

right now i plan on staying with 18" wheels. if the wheel is 18x8, is the "8" equivalent to tire width, i.e., 245 or 225? (can you tell i am in unfamiliar territory?) if i stay with 18" wheels and the offset is 25, what is the correct width? How about an offset of 35? how do you determine what is correct?

 

Flush Fitment

Im not Sure what look your Going
After but a 18x8 might not get you Flush.

I think a 18x9 Front 18x10 Rear
and I would Highly Suggest Going 19'
to get the Perfect Fitment.

Im Going to look at a Similar Setups and Give your There Size...


2007 Nissan NISMO 350Z
http://blogs.superstreetonline.com/6203950/street-racing-rides/2007-nissan-nismo-350z/index.html
(18x9-inch front, 19x10-inch rear)

2003 Nissan 350Z
http://www.superstreetonline.com/featuredvehicles/130_0903_2003_nissan_350z/index.html
19x9.5 and 19x10.5 Volk GTS were covered in 255/35 and 285/30 wide Toyo T1-R rubber

Jun Auto's 838whp AWD Nissan 350z
http://www.superstreetonline.com/featuredvehicles/130_0705_jun_auto_nissan_350z_r/build_process.html
Advan RGII 18x10 +25 offset (front), 18x10 +35 offset (rear); 265/35R18 Advan A048 tires


2003 Nissan 350Z
http://www.importtuner.com/features/impp_0811_2003_nissan_350z/index.html
19-inch The fronts are 9.5 inches offset of +15mm rears are 10.5 inches wide offset is +7mm. 245/35 front 275/30 Rear