Rim offset, more accurately referred to as wheel offset, is the distance from the hub mounting surface to the centerline of the wheel. If this measurement isn't suited to the specific vehicle, the vehicle won't handle as it should. Wheel offset measurement is defined in three different ways. Zero offset occurs when the hub mounting surface is completely even with the centerline of the wheel. Positive offset means that the hub mounting surface is toward the front of the wheel, while negative offset means the surface is toward the back or brake side of the wheel.
When the width of the wheel changes, it also changes the offset. If the offset stays the same but width still increases, the width is split between the inside and outside—this obviously will not work, which is why we've tested the fit on thousands of different vehicles. We are fully prepared to help you find the proper wheel fitment. Search our wheels by vehicle, or contact one of our sales specialists.
Increasing the width of that wheel one inch and keeping the offset the same would result in the wheel being pushed out 1/2" toward the outside of the vehicle. To compensate for the change in width and keep the mounting position the same, your needed offset would be +91
marshall@tirerack.com
Thank you for your inquiry. Although I cannot confirm your fitment due to a lack of information about the vehicle, your measurements do appear to be fairly accurate. Increasing the offset of the wheel would indeed compensate for the thickness of the spacer. Thank you.
marshall@tirerack.com
I have a 2002 Corvette Z06 with stock rims. I've recently ordered aftermarket wheels but they are not available in the exact stock offsets.
The stock rims are as follows:
17 x 9.5, +54
18 x 10.5, +58
The new rims will be:
18 x 9, +50
18 x 10.5, +65
Could you advise if these offsets are overall fairly close to stock? I am thinking about adding a half in spacer to bring the rear offset to stock. Are there downsides to adding wheel spacers?
Thanks,
Rick
Terrence
That wide of wheel with such an aggressive offset would require modification to avoid rubbing. It would sit quite abit further to the outside of the vehicle and likely interfere with your fenders / rear quarter panels.
I drive an 06 Porsche Boxster S with the following OEM wheel diameters:
Front: 8" x 19" - 57mm offset. 235/35 ZR19
Rear: 9.5" x 19" - 46mm offset. 265/35 ZR19
I am swapping out my wheels for some aftermarket 19" Axies Pentas.
The diameters on the new wheels are as follow:
Front: 19" x 8.5" Offset: 45
Rear: 19" x 10.5" Offset: 52
Will these wheels fit my car?
Will I need spacers?
What size spacers will I need?
Will the spacers affect the performance, handling, or wear any parts of the car?
Is there a difference between brand name or custom spacers if they are all made out of the same material?
Thanks!
-I doubt you would need a front spacer. Might need a rear spacer.
-Probably no more than 10mm.
-For street use, they should not cause any problems if done correctly. For track, you might need to replace lug bolts more frequently due to the need for longer lug bolts.
-Possible differences: uniformity of the metal (variation might cause vibration), hubcentric fit, inclusion of lug bolts with the necessary extra length.
Hope that helps,
ben@tirerack.com
My goal is to use the same size wheel all round so that i can rotate them.
If i want to keep my wheels as flush to the fenders as possible without having to use spacers...or having to roll or pull my fenders what offset would work best ?
I'm thinking that maybe i can use a 25 offset all round and if not maybe a 30 offset. However for the latter i would have to go to a 17x9.5 which i think may be too aggressive.
I do not have coil overs to contend with as i plan to lower the car on Eibach Sportlines lowering the front 2.2" in the front and 2.1" in the rear
Anyway, I'm talking from a layman perspective so I would love the experts to weigh in on this for me.
Thanks
Chris
We do not offer either of the wheels you mentioned for sale, nor do we have any fitment information surrounding them. Please feel free to contact us on this matter at any time regarding any wheel you find listed on our website.
That is not a wheel that we sell and unfortunately I do not have any fitment information. -marshall@tirerack.com
There are several options that would be available to fit your parameters. Please let em know if you would like to discuss further. -marshall@tirerack.com