Too much sidewall for a new edge?
10-19-2010, 07:14 PM
#14
6th Gear Member
Join Date: Feb 2007
Location: state of confusion
Posts: 7,635
Just so you know, I've got a spreadsheet that overlays plots of two different wheel/tire combinations, including offsets. The sidewalls are shown as curved and the section width increase as wheel width goes up is accounted for. There is a picture up in one of my albums that I used in some other thread. Takes under a minute to get a *.jpg ready for upload.
Norm
Norm
10-23-2010, 06:54 AM
#16
6th Gear Member
Join Date: Feb 2007
Location: state of confusion
Posts: 7,635
285/40 tires do not belong on wheels less than 9.5" wide, according to the people who make them.
I'd cut you another half inch if your driving falls into straight line running and no harder than moderate cornering, so 9" with those restrictions.
On wheels narrower than 9" - only for a trailered show car.
Norm
I'd cut you another half inch if your driving falls into straight line running and no harder than moderate cornering, so 9" with those restrictions.
On wheels narrower than 9" - only for a trailered show car.
Norm
10-23-2010, 11:37 PM
#17
4th Gear Member
Join Date: May 2005
Location: New York
Posts: 1,648
285/40 tires do not belong on wheels less than 9.5" wide, according to the people who make them.
I'd cut you another half inch if your driving falls into straight line running and no harder than moderate cornering, so 9" with those restrictions.
On wheels narrower than 9" - only for a trailered show car.
Norm
I'd cut you another half inch if your driving falls into straight line running and no harder than moderate cornering, so 9" with those restrictions.
On wheels narrower than 9" - only for a trailered show car.
Norm
10-24-2010, 07:28 AM
#18
6th Gear Member
Join Date: Feb 2007
Location: state of confusion
Posts: 7,635
9" is still half an inch under the listed minimum for at least the NT555 and NT555R models (which I just checked).
I'd cut you the same half inch of slack against that minimum, subject to the same straight line & moderate cornering driving restrictions.
It's tough to define how "hard" cornering is - particularly since your idea of "moderate cornering" or whatever very likely differs from mine. But if you're finding it pretty easy to steer the car using the throttle in any gear that's reasonable for the car speed - that's too hard for this kind of tire:wheel combination.
That particular tire size has more than enough load capacity, so as long as you maintain a streetable pressure (vs dragstrip) you should be OK from the standpoint of tire carcass heat buildup.
Norm
I'd cut you the same half inch of slack against that minimum, subject to the same straight line & moderate cornering driving restrictions.
It's tough to define how "hard" cornering is - particularly since your idea of "moderate cornering" or whatever very likely differs from mine. But if you're finding it pretty easy to steer the car using the throttle in any gear that's reasonable for the car speed - that's too hard for this kind of tire:wheel combination.
That particular tire size has more than enough load capacity, so as long as you maintain a streetable pressure (vs dragstrip) you should be OK from the standpoint of tire carcass heat buildup.
Norm
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