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[Ghostbear]

I switched to my winter setup again, since the Winter RFTs were done I went on to get some

http://www.conti-online.com/generato...-ts-830-p.html

My Service Technician messed up and only replaced the rear tires. So Winter RFT Front and Non-RFT back. If I have to take a corner at 60 downhill it feels incredibly wobbly and almost as if the tire would slip off the rims. But only the rear. Tires in the back are at 3bar / ~42psi

Does the tire need to settle, it feels like the DTC is also intervening at some points.


Front Tires have also been ordered and will be added next week but man this creeps me out.

[Dackelone]

New tires will feel "greasy" when new. You need to drive carefuly for the first few hundred miles. BUT I would recomend you not to mix you tires - like you have now. Either put all summers or all winters on!

[Tom K.]

Mixing RFT & non RFT is probably not a good idea - glad that will only be for a few days.

But why 42 psi in the rear? Why not start at 32F/35R (you'll have to do the conversion) and work up from there? It sounds like the combination of high rear pressure, new tires & tire construction mixing is creating some traction issues, causing the DTC to activate prematurely.

Tom

[Ghostbear]

Sorry one thing got mixed up I have 4 Winter tires front are RFT, Rear are non RFT.

My Girlfriend kind of lives in the alps and we have some visits upcoming, also they already had snow 42 is the recommended pressure for full load, also the dealer put them in this region.

[Dackelone]

I still would not MIX normal tires with RFT tires. The RFT have still side walls and way better turn in response than normal tires.

I have seen test done by Auto Motor und Sport (on VOX german Tv) when they would "mix" tires on a car. This "mix" would be old (6 yrs+ ) tires on the rear of a Golf and new tires on the front. Both sets of tires had the SAME thread depth! One had soft rubber and the other had hard rubber. The car would oversteer like mad. Or understeer if they reversed the tire/axles. Bottom line you do not want to mix tires!

[wtzouris]

The tire pressures seem way too high, we are talking cold tire pressures, right? Like measured after at least 6 hours of not driving the car?

I would start with 36 front, 39 rear or something like that (Normal is 33/36) if you think you have heavier gross vehicle loads and and driving regularly at very high speeds.

Also mixing RFT and Non-RFT is a bad idea, as others have mentioned. totally different ride, like having really soft shocks in the back.

[VMRWheels]

The characteristics of RFT fronts and high pressure Non-RFT rears sounds to be the problem. I would decrease the rear pressure about 5 PSI and see if it helps stabilize the rear end slightly.

-Charles@VMRWheels

[Ghostbear]

Thanks for the answers. It was not my idea to do this setup, I ordered 4 Tires. My Service Tech understood that the 2 most weared should be exchanged. Hopefully they will be able to deliver the second pair fast.

[Dackelone]

Originally Posted by maxnix

Generally speaking, running winter tires over 60 mph at 55° F or greater for any extended period of time will wear them quickly.

Maybe you have some really trick formulations for winter tires in Europe we don't have here. But it seems a little early to be mounting them unless you live in the Alps.

It is getting kind of chilly outside over here. And where I live it is onlu 300m above sealevel. Go above 700m and it gets much colder at night. By German law when the temps get under 7'C (and past Nov 30th I think!>?) you need to have snow tires mounted. Or All Seasons. No one runs AS tirss though. They are lousy in summer AND winter! lol I think I will put mine on next month though. Usually most Germs leave them on from the end of Nov until mid April.

Right now our daytime highs are only about 15'C. Some nice days are as high as 20'C! Lows are in the 7' to 9'C range. Soon we will need snow scrapers in the morning! lol

[ND40oz]

Originally Posted by Dackelone

It is getting kind of chilly outside over here. And where I live it is onlu 300m above sealevel. Go above 700m and it gets much colder at night. By German law when the temps get under 7'C (and past Nov 30th I think!>?) you need to have snow tires mounted. Or All Seasons. No one runs AS tirss though. They are lousy in summer AND winter! lol I think I will put mine on next month though. Usually most Germs leave them on from the end of Nov until mid April.

Are you sure about that? I thought Austria had that law, but Germany only required you to have snow rated tires (M+S) if you're driving on snow/ice. As in, you have to have proper tires suitable for your current driving conditions. Your insurance company may have their own requirements as well, but probably won't pay out if you have an accident in the snow and don't have the proper tires.

[Ghostbear]

Just a short feedback. Front tires were mounted yesterday. It's night and day!