Input on next set of track tires

[VUDU V8 Steve]

Wow, you are running a giant footprint! Does anybody run 325's in front? I thought 315 square was big.
You'll have so much grip you'll need a G-suit next...

 

[ChipG]

Haven't seen anybody respond on it, so maybe I'll be first. Getting the 325 SC3s put on Saturday, we'll see how it goes.

 

[o-man]

I’ve seen a picture of a GT350 with 325-25 square. So as long as there is clearance for the 30’s, I guess it should work

 

[ChipG]

I’ve seen a picture of a GT350 with 325-25 square. So as long as there is clearance for the 30’s, I guess it should work

Interesting, don't think I've seen that profile. I do know, secondhand, of folks running 325/30/r19, so I'm giving it a go. I'll pick them up Saturday and run them at Barber the following weekend, so I can let you all know how it works out.

 

[Ewheels]

I think @boardkat mentioned he uses 335 square. Fairly certain he has different fenders though

 

[ChipG]

I think @boardkat mentioned he uses 335 square. Fairly certain he has different fenders though

I found his build thread and here's his summary on running 18x13 wheels up front with 335 tires:

Front
1.) Offset struts
2.) "Right-sized" piston or enlarged strut hole
3.) Camber plates
4.) More than -3.5 camber
5.) 700lbs+ 2.25ID 5" springs
6.) A BIG-ASS adapter (and not having an aversion to running one)
7.) Quik-Latch bumper attachment points
8.) Rolled/Pulled/Spaced fenders
9.) Fender liners removed
10.) Creative placement of various parts/lines
11.) Ability to stomach 2mm of inboard strut clearance and NO fender clearance with occasional rubbing/self-clearancing

Certainly more than I have done or plan to do on mine. Hopefully not necessary for 19x11.5 with 325s.

 

[NZGUL]

Interesting, don't think I've seen that profile. I do know, secondhand, of folks running 325/30/r19, so I'm giving it a go. I'll pick them up Saturday and run them at Barber the following weekend, so I can let you all know how it works out.

I'm having issues with sidewall wear, I also am running square 11.5's. Seems like the 3R/305's are too stretched on that wide of a rim, my were marks disappear after one session. How'd the 325's do??? I'm also probably going to run all the SPL parts up front with the Vorshlag so I can get at least 3*

 

[Scootsmcgreggor]

I'm having issues with sidewall wear, I also am running square 11.5's. Seems like the 3R/305's are too stretched on that wide of a rim, my were marks disappear after one session. How'd the 325's do??? I'm also probably going to run all the SPL parts up front with the Vorshlag so I can get at least 3*

Tire stretch makes the sidewalls stiffer, its not the stretch that is making them wear on the edges. A lack of camber or too low pressures or both are your culprits. Per above you are less than 3*, which for a tire as grippy as a 3R is way not enough for most any setup on our cars.

 

[ChipG]

I ran the 325s at Barber and they worked great. I did run a 3mm spacer on the rear as the tire was quite close to the parking brake bracket and the top shock mount so I wanted a little extra clearance. I had no rubbing issues and had great grip.

 

[TMSBOSS]

325’s fit?? Nice. I’ll step up one size once I burn up the 305’s I just bought.

 

[NZGUL]

Tire stretch makes the sidewalls stiffer, its not the stretch that is making them wear on the edges. A lack of camber or too low pressures or both are your culprits. Per above you are less than 3*, which for a tire as grippy as a 3R is way not enough for most any setup on our cars.

Tru, but I can't get anymore camber with current setup, less than 1/2" away from struts, need to push the whole wheel assembly out a bit more, running 35mm spacers already

 

[Scootsmcgreggor]

Yeah camber plates for sure!

 

[NZGUL]

Yeah camber plates for sure!

Got those, need the Vorshlag!

 

[Bill Pemberton]

That sounds roomy , I only have about 1/8 to 1/4 of an inch with my tires to my struts using a 25mm spacer .

 

[o-man]

I'm curious if that would fit a regular S550 with maybe a 31mm front spacer? I think camber gain under compression would keep tire off of the fender. hmmm