Optimal Wheel Offset for Widest Square 18" Forgestar CF5 Wheel Setup on 02 LS1 C5 Z51
01-21-2018, 09:54 PM
#1
Optimal Wheel Offset for Widest Square 18" Forgestar CF5 Wheel Setup on 02 LS1 C5 Z51
Hello all,
I have a 2002 LS1 Corvette Z51 that I do time attack events with. I'm going to be running 285 mm wide tires on 18" wheels at all 4 corners of my C5 this season. What is the optimal offset for fitting the widest 18" Forgestar CF5 wheels to a C5 Corvette at all four corners for a square wheel/tire setup that doesn't extent past the fenders? My time attack class requires that the top of my tires not extend pass the stock fenders when viewed from above.
From my searching, it sounds like an 18x11" wheels with a +64mm offset should fit the front and rear without extending past the fenders and without rubbing when turning the front wheels. Is that correct or will I need to size down to an 18x10.5" with +58mm offset to get the wheels to fit the front and rear of my C5 without issues?
Thank you all in advance for your help.
I have a 2002 LS1 Corvette Z51 that I do time attack events with. I'm going to be running 285 mm wide tires on 18" wheels at all 4 corners of my C5 this season. What is the optimal offset for fitting the widest 18" Forgestar CF5 wheels to a C5 Corvette at all four corners for a square wheel/tire setup that doesn't extent past the fenders? My time attack class requires that the top of my tires not extend pass the stock fenders when viewed from above.
From my searching, it sounds like an 18x11" wheels with a +64mm offset should fit the front and rear without extending past the fenders and without rubbing when turning the front wheels. Is that correct or will I need to size down to an 18x10.5" with +58mm offset to get the wheels to fit the front and rear of my C5 without issues?
Thank you all in advance for your help.
Last edited by IAmIronVan; 01-21-2018 at 09:54 PM.
01-22-2018, 09:26 AM
#2
If you order your wheels from Sam Strano, he can help you figure this out (that's what I did). I called him up, and we worked through the offset of 18x11s that I needed to bring them as far inboard as possible. We ended up with a +59 offset. These do somewhat limit steering lock (I'm down to 1 full turn of steering before wheel hits control arm).
That said, depending on which tire you're going to run, it may or may not benefit from the 11" wide wheel, and you can run a 10.5 with significantly reduced cost.
That said, depending on which tire you're going to run, it may or may not benefit from the 11" wide wheel, and you can run a 10.5 with significantly reduced cost.
01-22-2018, 06:39 PM
#3
Pro
If you order your wheels from Sam Strano, he can help you figure this out (that's what I did). I called him up, and we worked through the offset of 18x11s that I needed to bring them as far inboard as possible. We ended up with a +59 offset. These do somewhat limit steering lock (I'm down to 1 full turn of steering before wheel hits control arm).
That said, depending on which tire you're going to run, it may or may not benefit from the 11" wide wheel, and you can run a 10.5 with significantly reduced cost.
That said, depending on which tire you're going to run, it may or may not benefit from the 11" wide wheel, and you can run a 10.5 with significantly reduced cost.
Last edited by clubracer23; 01-22-2018 at 06:40 PM.