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Hi all, I've looked everywhere but cannot find a definitive answer to this question. I just picked up a 2024 Stingray Z51 w/magride that I'm going change the wheels on but also want them more flush with the fender. I'm going to get wheels that are the same size as stock except for the offset. However, before I do I'm trying to understand how those will perform on the track if I purchased ones with a 15-20mm lower offset than stock. Does anyone track their car on wheels with a lower offset and, if so, how does it perform? Are there any issues?
If it's not safe or will cause the car to drive worse, I could just add spacers and then remove them when I go to the track but I'm not even sure if that's possible because I've read that some spacers require shaving the stud down. Any advice would be great- thank you!
My 2 cents:
You should be fine. It increases leverage of tire over the suspension (i.e. making suspension feel softer), but if you're keeping the narrow OEM sizes anyway, I don't think it'd matter much if at all. If anything, slightly wider track might help in handling.
My 2 cents:
You should be fine. It increases leverage of tire over the suspension (i.e. making suspension feel softer), but if you're keeping the narrow OEM sizes anyway, I don't think it'd matter much if at all. If anything, slightly wider track might help in handling.
You'll need to worry about scrub radius if the offset of the wheel is changed. I haven't seen any specs on where the stock scrub radius is unfortunately. Maybe there is a way to measure without using special alignment tools.
On these cars, the shocks are pretty upright, almost perpendicular to the ground. I think the scrub radius is less of an issue due to this. I should also mention Z06/wide body cars also share this identical suspension geometry, and they employ wheels with offsets pushed about 25 mm outwards.
On these cars, the shocks are pretty upright, almost perpendicular to the ground. I think the scrub radius is less of an issue due to this. I should also mention Z06/wide body cars also share this identical suspension geometry, and they employ wheels with offsets pushed about 25 mm outwards.
Shock position on double wishbone suspension systems has no effect on scrub radius.
I have really aggressive offset APEX SM-10RSs (35f, 44r), the car is a couple tenths quicker at Sebring with the same tire, and significantly quicker autocrossing. I suspect this is more due to the weight vs. the offset change.
It's also been 12 track days and the offset has not caused an issue with the shocks or otherwise.
I have really aggressive offset APEX SM-10RSs (35f, 44r), the car is a couple tenths quicker at Sebring with the same tire, and significantly quicker autocrossing. I suspect this is more due to the weight vs. the offset change.
It's also been 12 track days and the offset has not caused an issue with the shocks or otherwise.
Are they also wider wheels? Wider wheels significantly improve the contact area of tires, even for the same width tires.
I have really aggressive offset APEX SM-10RSs (35f, 44r), the car is a couple tenths quicker at Sebring with the same tire, and significantly quicker autocrossing. I suspect this is more due to the weight vs. the offset change.
It's also been 12 track days and the offset has not caused an issue with the shocks or otherwise.
This is very helpful since I run Sebring as well. I was hoping someone could chime in that has actually done it. What size wheels and tires do you have?
Using Cup2 265/315. Car has gone 2’23.0 Sebring, will drop a couple of seconds with a better tire. The Cup2 tolerate the rain much better though and this past season about half my events had rain.
Using Cup2 265/315. Car has gone 2’23.0 Sebring, will drop a couple of seconds with a better tire. The Cup2 tolerate the rain much better though and this past season about half my events had rain.
Follow up question on this- do the track alignment specs change when the wheel has a lower offset?
Following up on this post. I ran the open track day at Sebring yesterday and had no issues whatsoever with the lower offset wheels (stance sf10 in stock sizes) or track alignment. Unrelated to this thread but still something to note is that the stock z51 brakes were ok, but didn't give me great confidence so I'll definitely change those next time I go. All in all it was great taking the car out on the track. It's not as fast as my old G80 M3 comp but it did handle better.
Using Cup2 265/315. Car has gone 2’23.0 Sebring, will drop a couple of seconds with a better tire. The Cup2 tolerate the rain much better though and this past season about half my events had rain.
I too went with -1” set up, but 18x10 et42 front and 19x11.5 et48 rear.
I went to a tire/wheel store pricing some Cup 2's and I was told i could go from 305/30's on the back to 325/30's which is a bit wider using the same wheel combination.
Is this ill-advised?? I imagine GM would have done this factory but there is a big price difference. I'm wondering if GM uses the 305's on the Z51 to save money instead of running the 325's.
Does anyone have any information in this area? Thanks so much for your wisdom.
Lower Offset Wheels and Track Performance
