BFGoodrich g Force R1 - 04 GT3 Sizes
08-25-2016, 06:58 PM
#121
Rennlist Member
Well, unfortunately, the 245 - 315 R1/R1S sizing does not work on my car.... Looked good in the air but once down and settled there is a lot of rubbing. The rears we might be able to work around, but the front would require changes.. Luckily my shop is known and the tire vendor will take the same back despite mounting, etc. Only good news. Going to start a thread on Hoosier fitment just to see...
08-25-2016, 07:26 PM
#122
Three Wheelin'
^normal/spec 6GT3 offset.
DHI - What front sizing did you use when you tried the R1s - 225 or 245?
TIA!
DHI - What front sizing did you use when you tried the R1s - 225 or 245?
TIA!
Last edited by cello; 08-25-2016 at 09:05 PM.
08-25-2016, 09:48 PM
#124
Three Wheelin'
Good to know.
What is the mounted width of the 225, if you know or could measure? We've found that the online data/specs are not (too) accurate unfortunately.
Guessing you feel there is 'enough' tire under you with those sizes? Not getting wheel spin on exit, etc? Front grip not giving up? They do seem to run a bit wider generally...
What is the mounted width of the 225, if you know or could measure? We've found that the online data/specs are not (too) accurate unfortunately.
Guessing you feel there is 'enough' tire under you with those sizes? Not getting wheel spin on exit, etc? Front grip not giving up? They do seem to run a bit wider generally...
08-26-2016, 12:28 AM
#125
Burning Brakes
My comparison point is the Yokohama AD08R, a very good street tire, which is the tire I have run almost exclusively on my GT3. My track wheels are in storage at the moment, but I can take some measurements next week. I can tell you when I put the 225 R1's side-by-side next to 235 AD08R, the R1's looked every bit as wide, which agreed with TireRack's online specs. Same for the 285 R1 rear next to 296 ADO8R rear.
Subjectively the tires feel much grippier than the AD08R's at both the front and rear, although the rear seemed to gain just a bit more. The car feels very balanced everywhere except for really slow tight turns, where I got some push. Overall, I'm very happy with the 225/285 setup, although I do plan to dial in just a bit more front camber.
Subjectively the tires feel much grippier than the AD08R's at both the front and rear, although the rear seemed to gain just a bit more. The car feels very balanced everywhere except for really slow tight turns, where I got some push. Overall, I'm very happy with the 225/285 setup, although I do plan to dial in just a bit more front camber.
08-26-2016, 09:28 AM
#126
Three Wheelin'
Thx fbirch. Don't worry about the measurements, we have a friend in a 6 C2 racecar that runs the 225s and have asked him for the same. One of the problems we have encountered is that the TR specs are different (of course) than the 'mounted' (actual or real) specs and when it is tight to begin with, well... That wont be the case w the 225s, I just want to be sure its enough tire for my set up and driving style.
Last edited by cello; 08-26-2016 at 04:10 PM.
08-26-2016, 09:33 PM
#127
Rennlist Member
I'm running R1's - 245 up front and 285 in the rear on a JRZ setup on my 2001 Carrera. I've just bought a 2004 GT3 and hoped they'd just come across as it's the same narrow body..hoping I don't have to back to 225's..i pick up the car in a few weeks so will report back. I love the R1's - not quite the grip of a Hoosier but at 40 heat cycles a set I'll take that any day!!
