Having doubts about the vreds......

[MoRS6+]

Right, no joke - Vredestein recommended for the RS6 255/35/19 Ultrac Sessanta tyre: 3.2 Bar for the fronts and 3.4 Bar for the rears (that's 46.41216 psi for the fronts and 49.31292 for the rears).

Don't believe me?

http://www.vredestein.nl/Onlineadvies_A ... D=23368037

Time.......to....................die..................................

[Cornishmoocher]

Have just emailed Vred to ask for verification on TP......

[ecain63]

Yeah, im at 38 allround myself. Had them on the car now for over a month and they feel spot on to me. You might need a little more time Mooch. They feel firmer than the PZero's but i put it down to the reduced profile. No problems otherwise. Try going round afew roundabouts at speed to get the glaze off.

[Daveperc]

I started at 40, but dropped to 38 and find that better.

Have no complaints on grip etc - but I'm not the Mooch!

Dave

[MoRS6+]

At the end of the day, as good as the Vreds are, the dry grip will never be as good as the GYE F1 Assys which came out on top in the Evo grouptest.

In fact, the F1 assyms' lap time was faster on both the wet-handling track and dry-handling track. The Vreds were better in the 'curved aquaplaning' test - but truthfully, how often are you going to be aquaplaning round a curve? Not very often. Whereas the things that the F1 excelled at (i.e. wet, dry grip and handling) you will be doing all the time.

I only went for the Vreds purely because they represented good value for money since they came 2nd overall in that grouptest - so they were better overall than many tyres costing alot more. But, 2nd is 2nd, not 1st. If money is no object then definitely go for the F1 Assys, period.

Regardless, I will be going for the F1 assys in 255 guise next time around. As much for comparison as anything else. I won't let money decide next time; I want the best, end-of. The tyre that came first.

[Daveperc]

how often are you going to be aquaplaning round a curve?

Very rarely I hope, but as I do I shall be thankful for my Vred's - (Whilst praying hard as well!!)

Dave

[philroach]

holy crap , 44psi on the standard wheels , must be like a pogo stick ?

[CliveH]

A wee bit OT here (sorry Mooch), but what are people's experiences with the Michelin PS2s please?

[Cornishmoocher]

Clive, probably the best tyre you can get- but comes at a price AND I am not sure that they were noticably better than the GYEF1Assys.

Anyhoo, recieved this mail from Vred. (sorry its over on SRS too, and it drives me potty when people cut and paste the zact same post in two spots- dunno why!)

Well,

I emailed Vred tehnical, and got this reply-

Hello Mr. Pino,

About the tyre pressure. Indeed we advise 46 psi for the front and 50 psi for the rear tyres. This is the advice at maximum load, for semi
load you can lower the pressure a bit.

----------
The tyre pressure we advise is calculated on maximum load. It is normal for a tyre to lose pressure after a while. Our experience is that people do not regularly check their tyre pressure. Vredestein advises this higher pressure because we want to avoid too low pressure which can irreparable damage the tyres, is responsible for more tyre wear, moreover it causes unnecessary fuel consumption. With a bit extra pressure all these negative aspects will be avoided, the only thing is that the vehicle may feel less comfortable, but in practice this comes out marginal.
--------

About the poor handling behaviour I have at the moment two possible explanations:

- 1 - First you have written "I have just changed my tires"

Brand new tyres have a very thin layer on the tread which consist a lot of oil (= due to the production process) . So in the beginning the tyres are more slippery ( "especially by cars which a very powerful you will notice this"). When this thin layer is worn out, depending on the circumstances after about 350 miles, you will get the optimal grip of the tyres.

- 2 - I do not know how the wheater conditions are at the moment at your place, but:

The Ultrac Sessanta is a real summertyre, this means that the performance at low temperatures ( tread compound will be very stiff) and snowy conditions is very poor.
At higher temperatures ( above 7- 10 °C) the handling behaviour will increase rapidly. I hope that you wil have the same experience?


Hopefully this answers helps you. In case you have more questions, please don't hesitate to mail us.

Kind regards,
Henri de Leeuw


Now shittin my pants about taking the car to Switzerland skiing.

[HYFR]

fair play to Vred for coming back to you...forget what good customer service looks like sometimes having an Audi !

[Daveperc]

Now shittin my pants about taking the car to Switzerland skiing.

Any summer tyres will struggle on snow/ice - personally I was very pleasantly surprised at how good the Vred's were under the conditions recently. We live at the top of a half mile steep hill and I happily drove up and down even when the snow first arrived and I had to get up with 3" of virgin snow on the road.

In the Alps I would definitely take chains or similar, or else contact Mart Williams and see if he'll lend you his Wintrac wheels for the trip??

Dave

[Cornishmoocher]

Now shittin my pants about taking the car to Switzerland skiing.

Any summer tyres will struggle on snow/ice - personally I was very pleasantly surprised at how good the Vred's were under the conditions recently. We live at the top of a half mile steep hill and I happily drove up and down even when the snow first arrived and I had to get up with 3" of virgin snow on the road.

In the Alps I would definitely take chains or similar, or else contact Mart Williams and see if he'll lend you his Wintrac wheels for the trip??

Dave

Now theres an idea!!

Mart???

Be worth a bottle or two_ have been struggling to find chains/socks to borrow (don't want to buy as it is just a weekend!)

[spurtle]

Even reading this post has me wincing. First with the balls to pump their Vreds up to 46/50 psi please post!

[ecain63]

^^^^I don't think they have computers on Mars. Thats where you'd be if you'd tried that.

[Cornishmoocher]

Apparently....... the side walls of the vreds are very soft, hence the need for the higher pressures. I will be taking it up to 45 just to try.......