Wheel Offset Affects Handling?
#2
Yes, spacing the wheel in/out will change scrub radius, which will have many noticeable effects on handling and performance, depending on application. On a mac-strut car, negative scrub will help with handling (because adding negative static camber on a mac-strut car will increase SAI). More scrub = more steering effort as well, which you'll also get from adding positive caster, something else mac-strut cars like a lot of.
#3
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Yes, spacing the wheel in/out will change scrub radius, which will have many noticeable effects on handling and performance, depending on application. On a mac-strut car, negative scrub will help with handling (because adding negative static camber on a mac-strut car will increase SAI). More scrub = more steering effort as well, which you'll also get from adding positive caster, something else mac-strut cars like a lot of.
Last edited by whoang40; Oct 9, 2007 at 11:46 AM. Reason: added camber comment
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A macpherson strut car is a suspension type with only a lower control arm and a strut instead of a shock. The wheel is mounted on a spindle that rotates about an axis created by the lower ball joint in the lower control arm, and the top of the strut where it mounts to the strut tower. The strut bolts to a ball joint at the strut tower so it can rotate freely, and is firmly bolted to the spindle.
Draw a line down the axis of rotation of the front wheel, then find the vertical plane that is exactly down the middle of the tire. The distance between the points where those two touch the ground is the scrub radius. The more scrub you have, the harder the car is to turn because the tire is not rotating around the same axis as the spindle so it 'scrubs' the ground.
Confusing, I know. Go look it up in a book with pictures. Not sure what SAI means (edit, check next post).
Draw a line down the axis of rotation of the front wheel, then find the vertical plane that is exactly down the middle of the tire. The distance between the points where those two touch the ground is the scrub radius. The more scrub you have, the harder the car is to turn because the tire is not rotating around the same axis as the spindle so it 'scrubs' the ground.
Confusing, I know. Go look it up in a book with pictures. Not sure what SAI means (edit, check next post).
#7
Rather than me spelling it all out, you'd probably learn a lot more by googling the terms. Wikipedia is an OK place to start, but sometimes the articles get filled with some crap b.s. that isn't immediately edited out.
Mac-strut = macpherson strut, what your car has up front for suspension
SAI = steering angle inclination, sometimes referred to as Kingpin inclination among the oldies.
Mac-strut = macpherson strut, what your car has up front for suspension
SAI = steering angle inclination, sometimes referred to as Kingpin inclination among the oldies.
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#9
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A low offset wheel will provide better handling because of the wider stance. It will effect scrub radius, and give you heavier steering feel, but you can offset that with more caster. But wider to an extent is better.
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