Rim and tire size
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,494
Likes: 32
Rim and tire size
My front rims are 17" and 9.5" wide. Rear rims are 18" and 10.5" wide.
It looks like most of the P275/40ZR18 tires are rated for rims up to 11" wide, so I am good for the rear tires.
In tire size P245/45 ZR17, only the Goodyear F1 GS EMT is rated to fit on a rim 9.5" wide. I was looking at getting the Michelin Pilot Sport A/S ZP. Looks like they don't fit the front rims.
Is there another size that will fit the front rims and not create problems with body clearances?
It looks like most of the P275/40ZR18 tires are rated for rims up to 11" wide, so I am good for the rear tires.
In tire size P245/45 ZR17, only the Goodyear F1 GS EMT is rated to fit on a rim 9.5" wide. I was looking at getting the Michelin Pilot Sport A/S ZP. Looks like they don't fit the front rims.
Is there another size that will fit the front rims and not create problems with body clearances?
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,494
Likes: 32
Probably stick with run flats, but I have been thinking about getting the repair kit and compressor to carry. I have seen a lot of positive posts regarding benefits of non-runflats for noise and ride.
Drifting
Joined: Oct 2006
Posts: 1,773
Likes: 2
From: San Diego CA
My front rims are 17" and 9.5" wide. Rear rims are 18" and 10.5" wide.
It looks like most of the P275/40ZR18 tires are rated for rims up to 11" wide, so I am good for the rear tires.
In tire size P245/45 ZR17, only the Goodyear F1 GS EMT is rated to fit on a rim 9.5" wide. I was looking at getting the Michelin Pilot Sport A/S ZP. Looks like they don't fit the front rims.
Is there another size that will fit the front rims and not create problems with body clearances?
It looks like most of the P275/40ZR18 tires are rated for rims up to 11" wide, so I am good for the rear tires.
In tire size P245/45 ZR17, only the Goodyear F1 GS EMT is rated to fit on a rim 9.5" wide. I was looking at getting the Michelin Pilot Sport A/S ZP. Looks like they don't fit the front rims.
Is there another size that will fit the front rims and not create problems with body clearances?
I believe these tires should fit your C5. As I understand it, the key is to make sure the overall diameter of the rear tire/wheel is taller than the overall diameter of the front tire/wheel to ensure the active handling works properly.
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,494
Likes: 32
Tire sizes and active handling
Does anyone know if the relative rotation speed of the front and rear tires is a factor in the active handling system? I'm looking at the following combinations and comparing them to the OEM tire sizes.
Goodyear 245/45-17 with 275/40-18 (OEM ratio 1.042254)
Michelin 255/45-17 with 275/40-18 (ratio 1.021879) My preference.
Michelin 255/40-17 with 285/35-18 (ratio 1.037594)
I'm assuming the slightly wider tire will have no real impact on handling or fit inside the wheel wells.
Le Mans Master
Joined: Sep 2000
Posts: 6,101
Likes: 44
From: ABQ NM
Cruise-In II Veteran
cartop,
I have seen people here on the forum use a lot of different tire size combinations; the combinations you mention should be of no concern to you at all. There seems to be a fair amount of "flexibility" in the algorithm used to activate the AH - you certainly don't need to precisely stay with the factory's front/rear circumference ratio. Conventional wisdom says just don't let the front tire circumference get bigger than the rear.
The wider tires will fit fine; you can easily run Z06 widths and beyond (obviously up to a point
) on your car w/o problem.
I have seen people here on the forum use a lot of different tire size combinations; the combinations you mention should be of no concern to you at all. There seems to be a fair amount of "flexibility" in the algorithm used to activate the AH - you certainly don't need to precisely stay with the factory's front/rear circumference ratio. Conventional wisdom says just don't let the front tire circumference get bigger than the rear.
The wider tires will fit fine; you can easily run Z06 widths and beyond (obviously up to a point
) on your car w/o problem.
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,494
Likes: 32
Thanks for the help everyone.
After considering the responses, I will probably go with the
Michelin 255/45-17 with 275/40-18 (ratio 1.0219)
or possibly
Michelin 255/40-17 with 275/40-18 (ratio 1.0656)
Thanks for the help.
Michelin 255/45-17 with 275/40-18 (ratio 1.0219)
or possibly
Michelin 255/40-17 with 275/40-18 (ratio 1.0656)
Thanks for the help.
