Turbo Cup Phone Dials
#31
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Thank you Matt H. ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
The first 3 digit number is the tread width in mm, the second is aspect ratio, the third is rim size.
245/45/16 means 245mm tread width, a sidewall 45% the height of the tread width(110.25mm), and a 16" rim.
255/45/16 is 255mm tread, 114.75mm sidewall, and a 16" rim.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
The first 3 digit number is the tread width in mm, the second is aspect ratio, the third is rim size.
245/45/16 means 245mm tread width, a sidewall 45% the height of the tread width(110.25mm), and a 16" rim.
255/45/16 is 255mm tread, 114.75mm sidewall, and a 16" rim.
#32
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Matt: "No, we dont and neither does anyone else with a brand name. Please, show me what you have. We havent made that size in about 8 years, if not longer."
I just saw some guy post on a site that he was using Bridgestone 255/45/16s earlier today. If you discontinued them, you'd certainly know better than i!
My appologies.![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
As far as using 225/50/16s up front and 245/45/16s up front, i did that on my 928 for about a week.
It looked stupid.....the front tire sidewall really looked misplaced with the one on the 245, and the tire was obviously taller. Made the car sit funny.
I'm running 245/45/16s all the way round now.
I just saw some guy post on a site that he was using Bridgestone 255/45/16s earlier today. If you discontinued them, you'd certainly know better than i!
My appologies.
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
As far as using 225/50/16s up front and 245/45/16s up front, i did that on my 928 for about a week.
It looked stupid.....the front tire sidewall really looked misplaced with the one on the 245, and the tire was obviously taller. Made the car sit funny.
I'm running 245/45/16s all the way round now.
#33
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
No need to apologize. It is possible the person who posted is in Europe or Japan and there is a possibility that there are still BS tires available in that size. In the US they have not been available for a long time!
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
#35
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
In a non-competition tire there isnt one. In a comp tire Kumho makes a 265/45R16, that is really too big for the 8" wheel and it is nice for the 9" but it is tall. They really made that tire for Camaros/Mustangs.
The 16" tires (as well as 15") are dead. For that matter, one could argue that in a 25" OD (that would be most European cars:BMW, Porsche, Audi, etc) that 17" is really dead. Aside from stock sizes manufacturers no longer spend a lot of time/money on 17" development.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
The 16" tires (as well as 15") are dead. For that matter, one could argue that in a 25" OD (that would be most European cars:BMW, Porsche, Audi, etc) that 17" is really dead. Aside from stock sizes manufacturers no longer spend a lot of time/money on 17" development.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
#36
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I've run 245-45-16's on all 4 wheels (8"F, 9"R) on my Turbo Cup car since I bought new it in 1987. Works great!
Regarding the exact measurements of specific tires, you really need to look at the manufacturer's specs for each tire. The exact dimensions of tires of "identical" sizes can vary quite a bit. Tire Rack has specs on their site.
Regarding the exact measurements of specific tires, you really need to look at the manufacturer's specs for each tire. The exact dimensions of tires of "identical" sizes can vary quite a bit. Tire Rack has specs on their site.
#37
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by centerpunch
I've run 245-45-16's on all 4 wheels (8"F, 9"R) on my Turbo Cup car since I bought new it in 1987. Works great!
Regarding the exact measurements of specific tires, you really need to look at the manufacturer's specs for each tire. The exact dimensions of tires of "identical" sizes can vary quite a bit. Tire Rack has specs on their site.
Regarding the exact measurements of specific tires, you really need to look at the manufacturer's specs for each tire. The exact dimensions of tires of "identical" sizes can vary quite a bit. Tire Rack has specs on their site.
I just sent you a private message with respect to your Cup car. I would like to ask you a few questions when you have time.
Thanks.
#38
Race Director
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by MTM
Instead of saying that it would increase the tendency to understeer, shouldn't you say that it would decrease the likelyhood of oversteer (i.e. while trail braking or accelerating out of a corner)? You made it sound like the car would understeer sooner with 225/265 than with the stock 205/225. In reality, he would still be increasing traction all around. It's just that he would be increasing the rear more than the front. So overall cornering ability would still increase, just not as much as if he went with something like 265/265.
Our cars first and foremost UNDERSTEER. That's the way they were designed. When setting up a 951 / 944S2 / 968 for the track, it's always a battle against understeer.
-Z.