New rear tyres....duff new handling.

[Ollie82.]

The rears on the Cup were perilously close to the '3 points per tyre' mark....1.8mm to be exact.
Paired with 2 two nearly new fronts, the handling was decidely front end biased recently.

Had the new rears put on on thursday eve and was looking forward to a back roads drive down to Brighton yesterday evening with 4 equally grippy corners....
I got to Brighton rather worried!
At anything over 80mph the car was wandering to the point where i thought a rear wheel was loose, and through some of the twisty bits i love i kept having to catch a snappy rear end.
What the feck?
Tyre pressures immediately came to mind.
Sure enough, OSR was 36psi (cold!!!) NSR was 33, OSF was 29 and NSF was 30.

Now back to 33 on the fronts and 30 on the rears, the car feels absolutely nailed as it should.
Just goes to show how sensitive these things are to differing pressures!

 

[ben_p]

What tyres?

They will take a good 250 miles to scrub in too, pe2s seem to be very greasy at first

 

[Ollie82.]

I've stuck with the Conti's. Did take into consideration that they are pretty boxfresh, but the way it was snapping felt like the rears were either way too hard, or there was a shock gone.

Took it for a blat this morning after i'd adjusted the pressures and the difference was like night and day.

 

[MarcoB]

Might need bedding in , there is a workshop film on them too so that needs to get scrubbed off before your on rubber... Spec 2's have a lot on.

 

[Ollie82.]

Oh they definitely aren't gripping anywhere near as tenaciously as they could, but you know that feeling when it all just feels wrong? It just felt awful as soon as i started pushing on.

Its never ever felt skittish on the rear end but it felt like a was driving a Williams...

 

[mgoode180566]

all ways found my 172 is very sensitive to tyre pressures.