asian312
20+ Year Contributor
- 678
- 4
- Sep 23, 2002
-
Houston,
Texas
Well here goes...I hate posting a question like this.
I've been pouring through the pages recently regarding tires, wheel sizes, and offsets and finally all that munbo-jumbo makes at least a small bit of sense. I'd pretty much settled on a 17x8 due to the headach of finding a proper fitting 17x9 that was decently priced. Well long and behold while searching the internet I came across a picture of a gen3 RX7 with 17x9 Kosei K1 TS in the rear. I jumpped on TireRack and they are not listed. I hit Kosei's semi-english website and they are listed in +35 offset. Quick call to TireRack expecting to hear, "No we dont have those." But instead I get, "Yep we have those in light grey and silver." Incase those that dont know what wheels I'm speaking of, here's a link:
http://www.tirerack.com/wheels/Disp...i&wheelModel=K1+TS&wheelFinish=Silver+Painted
So they are 17x9 (+35), weigh in at 16lbs for $259 ($20 more than the 17x8). So I'm trying to summerize all the data on 17x9s that I can and trying to rationalize this all in my head.
Why 17x9? Because that's what's needed for 255/40/17. And provides the tire options to run 235/45 and 245/40
Do they fit? yes ( http://www.martincheck.com/wheel_tire_fitment_FAQ.html ), but is it safe to have the tire that close to the rear inside control arm?
How much lateral travel does a tire have during track condition corning loads?
If I understand correctly adding a 5mm spacer will move the wheel out from the center of the car effectivly changing the offset from 35 to 30. Will this solve the problem in the rear?
Rubbing? Fender rolling? yep, a big helping of my baseball bat is in order. Car will see minimal lowering (1"-1.5") and these are track specific tires that will be shielded from Houston's endless potholes and construction.
Suspension is at a tossup at the moment. Pocket book and sensability say Konis with H&R OE springs. Inner child wants JICs and a vacation in California. Ultimate deciding factor, Fiance's rear end driving around town (think Koni/H&R wins).
And lastly
7. I have searched for and read the FAQ's, Tech Articles, and threads on wheel and tire fitment:
a) Yes, but I just need someone with experience to validate my choices
I've been pouring through the pages recently regarding tires, wheel sizes, and offsets and finally all that munbo-jumbo makes at least a small bit of sense. I'd pretty much settled on a 17x8 due to the headach of finding a proper fitting 17x9 that was decently priced. Well long and behold while searching the internet I came across a picture of a gen3 RX7 with 17x9 Kosei K1 TS in the rear. I jumpped on TireRack and they are not listed. I hit Kosei's semi-english website and they are listed in +35 offset. Quick call to TireRack expecting to hear, "No we dont have those." But instead I get, "Yep we have those in light grey and silver." Incase those that dont know what wheels I'm speaking of, here's a link:
http://www.tirerack.com/wheels/Disp...i&wheelModel=K1+TS&wheelFinish=Silver+Painted
So they are 17x9 (+35), weigh in at 16lbs for $259 ($20 more than the 17x8). So I'm trying to summerize all the data on 17x9s that I can and trying to rationalize this all in my head.
Why 17x9? Because that's what's needed for 255/40/17. And provides the tire options to run 235/45 and 245/40
Do they fit? yes ( http://www.martincheck.com/wheel_tire_fitment_FAQ.html ), but is it safe to have the tire that close to the rear inside control arm?
How much lateral travel does a tire have during track condition corning loads?
If I understand correctly adding a 5mm spacer will move the wheel out from the center of the car effectivly changing the offset from 35 to 30. Will this solve the problem in the rear?
Rubbing? Fender rolling? yep, a big helping of my baseball bat is in order. Car will see minimal lowering (1"-1.5") and these are track specific tires that will be shielded from Houston's endless potholes and construction.
Suspension is at a tossup at the moment. Pocket book and sensability say Konis with H&R OE springs. Inner child wants JICs and a vacation in California. Ultimate deciding factor, Fiance's rear end driving around town (think Koni/H&R wins).
And lastly
7. I have searched for and read the FAQ's, Tech Articles, and threads on wheel and tire fitment:
a) Yes, but I just need someone with experience to validate my choices