When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Does anyone have any experience with buying after market wheels that require offsets? Does it affect handling or ride or any other parameters? Does more or less offset effect any of these? Thanks for any response!
GM changed the C4 Corvette to zero scrub radius for the 1988 model year and continued that through the C5 era. To get zero scrub they changed control arm lengths and wheel offsets.
From Wikipedia https://en.wikipedia.org/wiki/Scrub_...e%20or%20zero. :
The scrub radius is the distance in front view between the king pin axis and the center of the contact patch of the wheel, where both would theoretically touch the road. It can be positive, negative or zero.
Large positive values of scrub radius, 4 inches/100 mm or so, were used in cars for many years. The advantage of this is that the tire rolls as the wheel is steered, which reduces the effort when parking, provided you're not on the brake.
The advantage of a small scrub radius is that the steering becomes less sensitive to braking inputs. More scrub radius adds to road feel by pushing the inside wheel into the ground.
An advantage of a negative scrub radius is that the geometry naturally compensates for split μ (mu) braking, or failure in one of the brake circuits. It also provides center point steering in the event of a tire deflation, which provides greater stability and steering control in this emergency.
From: https://race.software/ulp_lesson/kin...%20suspension.
Which scrub radius is best?
In most production vehicles, the scrub radius is kept to small values (either positive or negative). A scrub radius of less than 10-15 mm would be ideal but is not always achievable. The wheel center offset is the lever arm for traction or impact forces into the suspension.
If you keep the overall tire diameter, along with wheel widths and offset the same as the OEM setup while only changing the wheel diameter you won't affect the scrub radius designed into the car. Since the ABS, TC and Stability Systems use tire diameter in their algorithms you want to maintain the OEM settings. If you want to change the width then you will need to calculate which offset you need to maintain scrub radius. Offset and backspace are just two ways of describing where the mounting flange of the wheel is located about the center line of the wheel.
So if I understand correctly the offsets that are going to be provided by the wheel manufacturer should be selected to maintain zero offset on my 2019 Z06? How will I know it's correct? Does the amount of concavity affect the spacer width?
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Wheel Offsets
