rmag

1st Quarter 2008

rmag

Just got back from track today. Running the 255/315 combo now (instead of 245/305), no issues on High speed stability under full braking ... besides a small amount due to full tread ... also turnin is much crisper with the 255/35 up front over the 245/40s.





Mooty . your slacking off on us. No track days for a whole week...what...work getting in the way!

mooty

yeah, october i only had ONE day on track, 18 hour work days inc weekends. i like to get all my work done in bunches then i can chill, hahaha.

pls be more precise:
both your 245/305 and 255/315 are full tread?
and when they were all FULL TREAD, 255/315 is still more stable than 245/305?

let me get ahead of myself here. on hoohoos, there are available:
245/35/18
245/40/18

why 35 aspect ratio, why not 40? i dont know how to calc total diameter. is that why you use 35? help me out here.

295/30/18
315/30/18

if the car pushes as many experienced, why not run 295? is this also due to overal diameter issue?

thanx.

wjh

doc2s

thanks rmag.

Erik

Mooty, yes, I was running on full thread. Good to know on the 255/315 combo, although the way these are wearing it's gonna take a little while before I get to try those.

scss98

Are you comparing 245/305 RA1s to 255/315 R888? I read elsewhere that the R888 305s causes some funny problems in stability in the rear. the 255/315 is a good match for diameter. They are both a bit shorter than the 245/305. 255/305 in R888s would have a shorter front tire relative to rear compared to stock. I am running the 245/305 with full tread and they squirm a lot. Plus I made the mistake of putting too much air in the back so lots of tail wagging!

mooty

no no, i know RA1 like the back of my hands. i am only comparing 245/305 R888 to 255/315 R888. so it appears that they will squirm unless shaved. damn..... at that price + shaving, i may have to try hoohoo's.

i dont expect R888 to last longer than RA1. my shaved RA1 is only good for 500 track miles, that's including moving them left to right to even out where.

TripleM

Wot's the width of your front rim pls to run 255

Thanks

Jack