315/30 tires on the rear of WB??
#1
315/30 tires on the rear of WB??
Hi all - I just bought a set of 996 Turbo hollow-spokes for next year's DE's, and they came mounted with Toyo R888's.
The fronts seem fine at 235/40, but the rears are large at 315/30.
Any thoughts about using these tires on my C4S? They're also 4 or 5 yrs old, so coming up on the end of their service life I think...
Comments appreciated!
The fronts seem fine at 235/40, but the rears are large at 315/30.
Any thoughts about using these tires on my C4S? They're also 4 or 5 yrs old, so coming up on the end of their service life I think...
Comments appreciated!
#2
I run the Falken Azenis RT615K 315/30 on the rear of my C2S on the 996 turbo wheels without issue - I do not remember my ride height off hand though. At 4-5 years, I would give yours a very close look and consider replacing, but that is me. I am sure guys will chyme in about running tires much older.
#4
#6
The Falken 235/40's and 315/30's have the same diameter at 25.5". I would prefer them closer to 25" but finding sizes that match front to rear with that diameter are difficult. I have run Yoko AD08R's 225/40 and 295/30 that are 25" diameter, but I like a little more meat up front than the 225 offers.
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#8
On the 993 AWD you want to have less than 3% difference between F/R diameter.
To the OP, here is a calculator, shows only .15 difference. Not sure how the sizes will that effect alignment, etc.
http://www.1010tires.com/Tools/Tire-...0R18/315-30R18
To the OP, here is a calculator, shows only .15 difference. Not sure how the sizes will that effect alignment, etc.
http://www.1010tires.com/Tools/Tire-...0R18/315-30R18
#10
That was also my concern. At my DE, I felt like I was fighting understeer with my 225f's. Having so much more tire out back could accentuate the problem?
On the other hand, maybe a grippier tire up front will be enough to combat my understeer. I was running Conti DW at my DE.
On the other hand, maybe a grippier tire up front will be enough to combat my understeer. I was running Conti DW at my DE.
#11
That was also my concern. At my DE, I felt like I was fighting understeer with my 225f's. Having so much more tire out back could accentuate the problem?
On the other hand, maybe a grippier tire up front will be enough to combat my understeer. I was running Conti DW at my DE.
On the other hand, maybe a grippier tire up front will be enough to combat my understeer. I was running Conti DW at my DE.
To quote Bill V.
"you can reduce understeer by,
increasing rear spring rate
increasing rear roll bar rate
increasing front wheel width
using more camber in front, less in back
softer front shock and or harder rear shock
remove weight from the front
higher front tire pressure, lower rear
bigger(more efficient) front spoiler, smaller rear
mre rear brake, less front"
I like Conti DW for the street but it seems most think they are not very good for DE/xcross.
#14
I would not run 4-5 year old track tires for sure, and R888s heat cycle out.
Larger wheel in the rear should take the preload off of the coupler so AWD should not be working at all...not like it does anything.
But 315 is a lot of tire in the rear but it also doesn't always mean more grip. The contact patch will have a different shape.
I run 225/275 NT01 combo on C4S and haven't really needed more grip in the rear. The car rotates well under light braking and stabilizes quickly if rear starts moving in high speed turns.
Larger wheel in the rear should take the preload off of the coupler so AWD should not be working at all...not like it does anything.
But 315 is a lot of tire in the rear but it also doesn't always mean more grip. The contact patch will have a different shape.
I run 225/275 NT01 combo on C4S and haven't really needed more grip in the rear. The car rotates well under light braking and stabilizes quickly if rear starts moving in high speed turns.
#15
I would not run 4-5 year old track tires for sure, and R888s heat cycle out.
Larger wheel in the rear should take the preload off of the coupler so AWD should not be working at all...not like it does anything.
But 315 is a lot of tire in the rear but it also doesn't always mean more grip. The contact patch will have a different shape.
I run 225/275 NT01 combo on C4S and haven't really needed more grip in the rear. The car rotates well under light braking and stabilizes quickly if rear starts moving in high speed turns.
Larger wheel in the rear should take the preload off of the coupler so AWD should not be working at all...not like it does anything.
But 315 is a lot of tire in the rear but it also doesn't always mean more grip. The contact patch will have a different shape.
I run 225/275 NT01 combo on C4S and haven't really needed more grip in the rear. The car rotates well under light braking and stabilizes quickly if rear starts moving in high speed turns.
I was intending to get new, dedicated DE tires - and I thought I'd go with slightly larger with 235/295. But maybe I should do some more research.