Looks like I'll be headed up to Tirerack.com to get my new tires today. (They have a distribution wharehouse in Reno) I'm going with the Khumo ECSTA MX YR rated tire.
The guy at the tire shop says that the 285's will fit fine on my 17x9 ZR1s.
I've read posts about this upsizing before nad don't remember any major probs...what say you oh technical friends?
Oh here's a post with more info I put up on another board...not sure if you can view as guest or not, you may have to registor, I know some of you already are .
[ 12. September 2003, 01:32 PM: Message edited by: SSHEETS ]
Posted by SSHEETS (Member # 1989) on :
Just answered my own question...I decided to call tirerack and ask.
On a low series tire (35-40s) the width of the whell is critical. By cheating a 1/2 inch on the tire size (Kuhmo says 9.5" min wheel for 285) in would increae the chance of catastrophic failure in my tire during hard cornering etc. by 95% (wag)
The 1/2" difference is applies pressure to the tire where it seats onthe bead. This, added to the forces encountered in high G cornering could likely unseat the tire during such an act.
Also, the additinal width would gain no performance advantage since the tire wold be slightly distorted from the narrowr wheel. The distortion would cuase the center of the tread to bow out, thus deteorating the tire's performance and wear.
BTW, the tread width on the Kuhmo 275/40/27 is 10.6 inches. The tread width on the Gooedyear Eagle F1 GS is only 9.7 inches.
Posted by Mark IXZD 150 (Member # 235) on :
quote:Originally posted by SSHEETS: Just answered my own question...I decided to call tirerack and ask.
On a low series tire (35-40s) the width of the whell is critical. By cheating a 1/2 inch on the tire size (Kuhmo says 9.5" min wheel for 285) in would increae the chance of catastrophic failure in my tire during hard cornering etc. by 95% (wag)
The 1/2" difference is applies pressure to the tire where it seats onthe bead. This, added to the forces encountered in high G cornering could likely unseat the tire during such an act.
Also, the additinal width would gain no performance advantage since the tire wold be slightly distorted from the narrowr wheel. The distortion would cuase the center of the tread to bow out, thus deteorating the tire's performance and wear.
BTW, the tread width on the Kuhmo 275/40/27 is 10.6 inches. The tread width on the Gooedyear Eagle F1 GS is only 9.7 inches.
True. This is why I cringe when I hear about people wanting to squeeze a 315 on a 9.5" wheel. Posted by SSHEETS (Member # 1989) on :
Scrubbed the mission! Tirerack's website showed the tires in stock...in stock in Delaware!!
They won't get a shipment out West until the 29th of this month Posted by KenC (Member # 189) on :
i preached this for years on these forums and most folks didnt listen to me......
but then heck...... what did i know..... im just a tire engineer......
LOL
the 285's are ok on the back. remember, tire manuf.'s allow for a 0.5" tolerance in design rim width on p meterics.
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