Different tyres on front on back?

[MarkMas]

I know you are not supposed to mix tyres, but does anybody know specifically how it would do to put a pair of Goodyear Asymmetric 2 on the rear and a pair of Asymmetric 3 on the front of my QPV? I don't seem to be able to find 4 GYAs the same anywhere. Nor can I find (or afford) any suitable Michelins.

 

[MarkMas]

I mean Michelin PS4S

My sizes are:
(front) 245/40R19 94Y
(rear) 285/35R19 94Y

 

[TimR]

Im no expert, and it's fair to say that there are certain motorcycles tyres that I would avoid putting together on the bike...
Mostly I believe this harks back to the bad old days of radials vs crossply...?
And herein lies the detail...Im happy to be told otherwise but unless the tyres are made with specifically different carcass construction/characteristics, I believe you will be fine.
I am also considering putting Michelins in conjunction with other brands ( are available)- I might avoid mixing across an axle however...!
The 4200 wasnt spec'd with XL load rated tyres. I was looking at the choices this might open up for me...Our roads are increasingly bad and it makes sense to pick your tyres to suit...

 

[CatmanV2]

I've often run differents front and back (and indeed side to side, although rather less than ideal perhaps) at least in terms of brands and models. X-ply vs radial, nope

C

 

[montravia]

DL Swindon fitted Michelin PS4SPPs whatever (the latest) to my rears yesterday. I've still the P0's on the front. Although they balked at Michelin at first indicating that the P0's were the designated tyre, they discovered that these are fitted now to Ferrarri instead of the P0's, so very happy to do so, with no mention of mixing front rear.

Yesterday here in the hills saw sleet, snow, slush, muddy roads from quarries, and I had the impression that the Michelin's were more confidence inspiring, certainly the bum wasn't as clenched as it usually is in such conditions. Time will tell.

 

[MarkMas]

DL Swindon fitted Michelin PS4SPPs whatever (the latest) to my rears yesterday.

Could I ask what DL charged for that, and what size they were?

 

[redsonnylee]

This is a good thread, I have one rear that requires replacing and have been thinking about this as I want to replace both rears together. The fronts are hardly worn so I am indeed going to mix the front and back. Once the fronts are worn I’ll have have the Goodyear F1s fitted so then they will all match.

 

[CatmanV2]

I've got Vreds at the back and planning some for the front to replace the PS4s

C

 

[TimR]

PS4s

C

The pural of PS4..?

 

[CatmanV2]

The pural of PS4..?

'Tyres'

C

 

[Doohickey]

I needed new rears but the fronts were fine so I've got PS4s on the back and Pirellis still on the front. Not had any problems.

 

[outrun]

DL Swindon fitted Michelin PS4SPPs whatever (the latest) to my rears yesterday. I've still the P0's on the front. Although they balked at Michelin at first indicating that the P0's were the designated tyre, they discovered that these are fitted now to Ferrarri instead of the P0's, so very happy to do so, with no mention of mixing front rear.

Yesterday here in the hills saw sleet, snow, slush, muddy roads from quarries, and I had the impression that the Michelin's were more confidence inspiring, certainly the bum wasn't as clenched as it usually is in such conditions. Time will tell.

Actually, you can choose now between Pirelli and Michelin when ordering a new Ferrari. Graypaul where not in the least bit surprised when I told them I'd changed to Michelin, not one iota.

For the record, I wouldn't have anything other than matching tyres all round but I suspect that's more to do with OCD than anything else!

 

[montravia]

Could I ask what DL charged for that, and what size they were?

Enormously expensive. I cringe but my bottom is less tense

 

[Keano]

I currently have summers on the front and winters on the back which are different but both Conti's. Have often had different summer brands on front and rear over the years but never on the same axle. Some may disagree but i have done 45K miles over the last 3 years and no issues. I get 8K on rears so not taking it easy either

 

[MarkMas]

Well, I emailed Goodyear to ask if I could mix A2s and A3 and amazingly a really nice chap from technical support called me back and talked to me about it for about 30 minutes. In the end his conclusion was: 'maybe'. And he asked me to let him know how it went!

He said that A2s were radials but had a bit of something cross-y in them which stiffened the sidewall. A3s might also have that, or might not. So there might be a difference in sidewall stiffness.

Also, he said that the regulations allow a great deal of latitude in tyre sizing so a 285mm tyre from one company might actually put as much as 300mm onto the road (really?!?). And so mixing brands might result in unexpected actual sizes. Here is a helpful chart:



And he said the real issue was not the rubber on the road but the computer in the car. He said that if the car had sophisticated (but dumb) computer systems, plus unexpected tyre behaviours axle-to-axle or (worse) wheel-to-wheel, then skid control systems might behave in inappropriate ways.

And he said that Dunlops (a Goodyear brand) were great for QPs, but it turned out he meant QP-IVs not QP-Vs.

And he said that Goodyear F1 Asymetric 5s are coming out soon, but it turned out not for QP-Vs.

I have no idea how much of this is valid. It certainly was not terribly useful.

I'm gonna try the mix....

 

[rockits]

I would say in the main your fine to mix back and front on a QP. I never mix tyres on the same axle though personally.

I would expect the same can't necessarily be said for a 4 wheel drive though as would suggest they might be more sensitive to mixing tyres front and back.

 

[Corranga]

My 4200 has falkens on the back and Goodyear Eagle f1 on the front. It was like this when I bought it.
I drove it and decided it was fine so left it that way, but had it felt bad, id have changed them.
Personally, I wouldn't fit different tyres unless I had a good reason to.

Mine are getting a touch old now, 6 or 7 years by the date code, so I'm looking at changing all 4 and they will match.

 

[bigbob]

I mean Michelin PS4S

My sizes are:
(front) 245/40R19 94Y
(rear) 285/35R19 94Y

Have you tried Conti Sport Contact’s? I run the SC3 on my GranTurismo in the summer and have been very impressed by them. Cheaper than Michelin too. In fact everyone rabbits on about Michelin for wear rates but I have always done better with Continental on a range of cars.

 

[Gazcw]

I mean Michelin PS4S

My sizes are:
(front) 245/40R19 94Y
(rear) 285/35R19 94Y

Ran ps4s front and Pirelli pzero on rears without issue for a while. It was still jittery at the rear but that is just Pirelli not the mix.

 

[sionie1]

I’ve just priced up 4 new Michelin pilot sport S’s all on K fitments. Ats want £1120 inc fitting ( which is free apparently) vs Costco at £874. Some of the local tyre depots can’t get the fronts on a Ferrari fitting others the rears. My local garage is confident he can beat anyone, so I’ll be interested to see what he comes up with.