Falken RT615K @ Tirerack
#1
Rennlist Member
Thread Starter
Falken RT615K @ Tirerack
Got exciting news today, Tirerack will now be carrying the RT615K
my favourite all-round performance tire in our 315 sizes
my favourite all-round performance tire in our 315 sizes
#3
Three Wheelin'
#4
RL Community Team
Rennlist Member
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#5
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But having said that, when I did the calculations for 245/40/18 & 315/30/18 and 235/40/18 & 315/30/18 I completely forgot to pay attention to which one is taller. I change what I originally said and would go with the sizes that make the rears slightly smaller like the summer recommended sizes.
#11
for awd i am fairly certain the 3% differential ratio btw front to rear is correct to not cause damage to the front differential by overheating it but i've always heard said that the REAR is the tire that if at all needs to be taller. not the front. i'm rwd so i have a bit more latitude if not sizing choices, but at least i don't get those dreaded cels when matching old X new tires. 235/40/18 X 315/30 still seems optimal for me handling wise. i've never felt the need to mess with success or stray too far away from porsche's recommendations. aside from the rwd part, of course.
but now i'm confused. is everyone certain that it's the FRONT that should be taller?! i'm a bit skeptical of that somehow.
but now i'm confused. is everyone certain that it's the FRONT that should be taller?! i'm a bit skeptical of that somehow.
#12
Three Wheelin'
225/40/18 approx 25.1" tall
295/30/18 approx 24.9"
Hence the front turns slower / less revs per mile.
#13
for awd i am fairly certain the 3% differential ratio btw front to rear is correct to not cause damage to the front differential by overheating it but i've always heard said that the REAR is the tire that if at all needs to be taller. not the front. i'm rwd so i have a bit more latitude if not sizing choices, but at least i don't get those dreaded cels when matching old X new tires. 235/40/18 X 315/30 still seems optimal for me handling wise. i've never felt the need to mess with success or stray too far away from porsche's recommendations. aside from the rwd part, of course.
but now i'm confused. is everyone certain that it's the FRONT that should be taller?! i'm a bit skeptical of that somehow.
but now i'm confused. is everyone certain that it's the FRONT that should be taller?! i'm a bit skeptical of that somehow.
And this is my dilemma as l can't find matching tires in my prefered PS2/ PSS
#14
Rennlist Member
Thread Starter
both 235/40 and 245/40-18 front tires are completely safe and acceptable with a 315/30-18 rear
#15