Vetman 66796608@Live

Does anyone have knowledge about mixing run-flat tires on the rear of a C6 with non-run flats on the front? I need to replace my fronts but the rears look almost new. I am thinking about replacing the fronts with regular tires until I wear out the rears then replacing them with regular tires. A local tire shop said he would not mount non-run flats on the front without also replacing the rears.

Also, what are the correct width tires/wheels on the 18" fronts and the 19" rears? I am shopping for wheels and I notice several different width wheels, all to fit my 2008 C6.

drewsteriam

My 08 C6 has exactly what you're wanting to do on it and has since I bought it. Had a bubble in the front right so I replaced the fronts with regular tires and have run flats on the rears until they wear out. Haven't had any issues. Some people might tell you there are grip issues, but I haven't seen any because I drive like a person with a brain.

MakoShark72

Absolutely no problem mixing, just keep the sizes close to stock...

This should be moved to the General Section, you'll get more response...

racerx3317

Running non run flats in the front of my Z. No problems at all. That said, I wouldn't do a track day with that set up. I pushed it on the street once and it seemed to have massive understeer.

Vetman 66796608@Live

Thanks for the replies. FYI, I was quoted a price of $360+ each for front Pirelli run-flats and then he told me they were only good for about 20,000 miles. Sticker shock to say the least.

Thanks again

pewter99

not a fan of mixing tires...just go Non RFT all around...

TLS_Addict

Are you saying that run flats wont have understeer?

If you noticed it with non-run flats I can imagine it would be worse with run flats. They are harder than a pecker on prom night.

09-Z51

No problemmo. Just put PS2's on the front and left the Goodyear F1 stockers on the back. It's amazing how much quieter it is.

racerx3317

The car never had any understeer in that same corner when I had the RFTs on the front. It could be since the front tires were new they still had the mold release on the tread which made them slip but it's something I never felt with the other tires on there.

AORoads

I wouldn't.

A couple of insights/answers from tirerack.com

http://www.tirerack.com/tires/tirete...jsp?techid=136

http://blog.tirerack.com/blog/make-d...ead-this-first

SG4206

The tread wear rating difference will have a bigger impact on handling than the RF vs Non RF. If you have 220 TW now on the rear ; and go with a 280 or higher on the front ; you will usually have more understeer.

cclive

I wouldn't either. At best, all four tires should be the same make and model but to me, the least that should be done is to have all four be the same construction.

TrekWater88

I have the stock OEM GY run flats up front and Michelin Pilot SS out back. No issues to this point. Only thing different is the addition of a Dynaplug tire repair kit and a car battery powered tire pump and of course AAA. A little better ride only because I have non-run flats out back. Once the fronts are worn out I will go Michelin SS up front as well. hope this helped with your decision, Brian

Bobcatt

I have run flats on the front and non runflats on the rear. No problems

Bill Dearborn

For normal putt putting around that most people do they will not notice. They aren't coming close to 35% of the original handling capability of the vehicle so if the capability is reduced by 50% they still don't know it and will not notice it until an emergency maneuver is required and then the car does weird things. If you do mismatch tires always have the best handling tire on the rear. Best handling doesn't necessarily mean the normal BS about EMTs being poor tires. They are actually great handling tires capable of being pushed quite hard on the track and outperforming some of the so called better handling tires. When you get in an emergency that is when you want known superior handling. If you put a better handling tire on the front you better change your EMTs. If you put a poorer handling tire on the front then you can keep them but it isn't generally advised to do that. You aren't driving a school bus.

Bill

cclive

It's not about going down the freeway at 65mph...it's about how the front and rear of the car will react in an emergency situation.

68/70Vette

I think that the non run flats have better performance...and certainly better prices...although still very expensive. I'd run non flats on the rear tires for better traction and less noise.

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There's a greater probability that a rear wheel tire will pick up a screw or small bolt. When the front wheel runs over a screw or small bolt, it flicks it up into the air, creating an opportunity for the rear wheel to "spear" it .