What size tyres? Ph1

[Freddy6868]

Hey guys sorry if this question has been asked before but i have had a quick skim on the forum and i couldn’t find an answer. The tyres on my car are 10 years or more old. So before i get her back on the road fresh rubber is needed. I am wondering what size is standard on the ph1 and what rubber are people running? I am pretty set on the pilot sport 4 but i have also looked into yoko AD08. What is everyone using and why? The car is only going to be used in dryish weather and the odd 15minute track session at shows. TIA

 

[Duncan]

Link to tyre info in knowledge base

I’ve ran Pilot Sports (ps3 or super sports) for the last 4 sets, tried some others before that but found Michelin’s to suit the car the best.

 

[Freddy6868]

Link to tyre info in knowledge base

I’ve ran Pilot Sports (ps3 or super sports) for the last 4 sets, tried some others before that but found Michelin’s to suit the car the best.

Thanks for the input so that confirms that i want to run the ps4 tyre then. What tyre size would you recommend too?

 

[Freddy6868]

All sorted. I managed to get to the car and check the sizes. For reference they are 205/50/17 235/45/17

 

[Satvc]

Just fitted Michelin sport 4s to mine. Even the first 10 miles was a massive improvement over the well perished Toyos.
Again I’ve stuck to the stock size.

 

[Ren5Clio]

I have achieved excellent results with my new tyre combination on my Phase 1 V6 but firstly when i bought the car someone had fitted 215 45 17 Federal RSR semi slick track day tyres on the front & 255 40 17 Accierra budgets on the rear. The front RSRs have really stiff side walls for track use (tyre man struggled to get them off) & together with the wider size it made the car track horribly over every undulation in the road to the point where it would change direction & provoke the rear when driving hard in twisty back roads. The Accerrias on the rear just had too much tread block movement & poor compound grip, they also didn't have a true 255 width (undersize) & had a large side wall to tread profile radius which caused them to tuck under which made the rear very unstable on direction change...... I have now fitted Toyo 205 50 17 R32s on the front (back to standard size) & have kept the 255 40 17 size on the rear but have used Yokohama AD08R. I first tried the car with just the front Toyos fitted & it transformed the front. Super smooth on the road surface, no kicking of the steering wheel & moving around also better turn in & mid corner grip (nice new compound & it works from cold). The rear was a bit better too as not provoked by the front moving but it was still a bit unstable on direction change & long corners. I then fitted the Yokohama rears as well & the car feels way better all round now. The instability has Been reduced a lot & the rear has much better grip in general, the traction has also been improved. The Yokohama does produce true 255 width tread profile which helps the grip & with a slight overhang outside the wheel rim it helps to eliminate the tyre tucking under during direction change & hard cornering. When the car rolls on the rear in the corners it leans on the tyre harder now & heats it up better. When the rears are cold the front has superb grip & turn in, you can feel the rear of the car has a little loss of grip but once the rears get warm (trait of a track based tyre) the rear picks up lots of grip & the front changes to a little entry - mid corner understeer which is actually nice & predictable. If the car is really pushed the mid corner understeer can turn to a little exit oversteer but only if you lift off a little too much mid corner so a little more "on throttle" mid corner sorts most of that out. Wet running is also greatly improved as well, the rear has better traction & less mid corner to exit oversteer. The front feels similar to the dry unless you really provoke it with sharp steering input where it has some turn in understeer. After a bit of trial & error I've found that running 26psi pressure in the front & 29psi in the rear seems to be the best combination with these tyres. Anyway i hope this helps anyone thinking about new tyre combinations on their Phase 1 V6 (will probably mostly apply to Phase 2s as well.) :race: