DSC sensitive after new rear tires

[evo828]

Hi, on my F82 (EU, non-comp) I have recently put new rear tires (stock size 275/35 19) while I kept relativelly worn front tires on (stock 255/35 19).

So the front are worn and the rear's are new. What I have found is that in corners the DSC light is ligthly blinking (even under light throttle) - although no intervention is felt - the occasional blink makes me nervous In MDM or DSC OFF I do not feel any instability so I do not feel the traction to be lost in these corners. Old tires (Michelin 4S) never did this.

Can it be that the DSC is sensitive to the rolling radius difference being cca 3% between front and back (estimate taking the front wear into consideration)? Pressures are ok (2.2bar on all four).
Read somewhere that it might be sensitive to this - but not sure if even on M3/M4.

[edwinm3]

if rears are brand new they're a bit greasy, drive them a few miles.

[evo828]

Ive done cca 200miles already. Will give them some more and see.

[theweebabySeamus]

There's not nearly enough of a differnce tin diameters o cause issues. If they're any less 'grippy' of a tire model than the 4S's, then there's your issue.

[evo828]

Thanks, will try another set of rear tires to compare

[RSXDC5]

Also, our dsc is not great, not great by a long shot.

[Chris@VargasTurboTech]

Generally that's going to mean your new tires aren't as sticky. Some tires take a little longer than others to get rid of that greasy feel but I'd think 200 miles is more than enough. Can try a few things including doing a "first gear tire surface refresh", after that it's into better tires.

[TopJimmy]

They are likely slipping a little from the release agent used on the tire forms. Drive them in for 200mi and see if DSC settles down.

[hoppes-no9]

Originally Posted by edwinm3

if rears are brand new they're a bit greasy, drive them a few miles.

^^ this. It took >100 miles for my new PS4S to start gripping well. Might take longer if it's cold or you're not driving hard.

[evo828]

So after another 200miles the conclusion is that these are shitty tires for driving. i was not having to much expectations as these were the cheapest tires I could have bought - but I was looking for the cheapest rubber just for bashing around and drifting.
The picture shows them compared to Michelin PS4S (on the top). The bottom ones are the "cheap" stuff: less contact rubber and the rubber composition might be also inferior to PS4S - so I will use these only for occasional drfiting until they will be gone.

[TopJimmy]

So what are these "cheapies" that we shouldn't buy?

[swagon]

Yeah, man, never cheap out on tyres because they're the only contact patch your car has with the road.

[evo828]

I have proper tires (Continentals and Michelins). This rear pair was bought cheap intentionally with the sole purpose of trashing them. Was just surprised how DSC is sensitive
The tires are Tracmax Privilo TX-3 275/35 19 - so definitelly not recomended for spirited driving around twisty roads - you will be scared