![]() Do let the tyres warn up in your first session (i.e. Lesson learned - constantly check pressures after each session, adjusting them down to around 30-31psi. We saw pressures nearing 35 psi (hot) but didn't adjust. Maybe we weren't trying hard enough Īnglesey, on the other hand, saw a lot more heat and increase in pressure to occur, so much that the front left tyre had excessive wear on the centre of its tread (lots of right handers!). From a cold pressure of 29psi, rising to 32psi after a lap dropping the pressures by 1-2 psi all round helped. The ring, for us, showed litle wear on the tread and only marginal increases in pressure. First time at the Ring and the second at anglesey - both tracks couldn't have been more different in terms of setup required for the tyres! (225/45ZR17) but not the front (195/50R16).Ĭlick to expand.We've run our used 888's at two events now. Regarding sizes, initially we will have a rear fit To be launched at the beginning of 2008, unfortunately this has beenĭelayed to at least mid 2008 but there is a good chance it will be Relatively short and you need the tyres to work/heat up very quickly. Sprint/hillclimb (around 60 second runs) where the distances covered are Some sizes in a 'SG' (soft/wet) compound. Only had one compound 'GG' (medium hard), but we have now introduced Some of you are also asking about different compounds. Of your car is a compromise between anything that is adjustable. Inevitably changing one thing will affect other things, the whole set up Lowering your pressures will cause them to decrease. Tread having to do more work resulting in the tread getting hotter. Increase, more pressure stiffens the tyre's casing which results in the Increasing your tyre pressures will cause your tread temperatures to Record temperatures within the range given above the probability is the Record in the pits will be lower than those during the race. More when you are slowing to come into the pits. Hotter when cornering and cooler when on the straights and cooling even The tread temperatures are constantly changing through out a race, The end of the race", this is usually due to the tread getting to hot. You often here competitors saying "My tyres started to go off towards ambient and track temperature, wet or dry. Increase Understeer Increase front pressures or reduce rear pressuresĪchieving the required tread temperatures will depend again on theĬonditions on the day i.e. Reduce Understeer Reduce front pressures or increase rear pressures Increase Oversteer Increase rear pressures or reduce front pressures ![]() Reduce Oversteer Reduce rear pressures or increase front pressures Pressures will usually be higher than the nearside.Ĭhanging hot inflation pressures by small amounts can be used to fine If you have been racing on a right hand track you will find the offside You will find that you will have a difference in pressure side to side, Hot pressures must be balanced side to side. Therefore the pressure increase will not be so great. Start with a higher cold pressure as the tyre will not get as hot If the day/track is cold you will need to Pressure will depend on the conditions on the day i.e. The cold pressure you set to achieve a desired hot Very Light 1400kg 27 - 35 psi 37 - 40 psiĪs a tyre gets hotter the pressure increases, this is due to the VEHICLE WEIGHT COLD PRESSURE HOT PRESSURE Too little pressure on a heavy car can lead to over deflection of the The pressures you use will initially depend on the weight of the car, I recommend that the tyres be put through 2 heat cycles It is advisable to have as much positiveĬastor as practical as castor induces a beneficial camber change duringĬornering. The maximum hot pressure we recommend is 40psi.Ĭamber angles up to 5 degrees are permissible but the final setting willĭepend on tread temperatures. Measured using a probe type pyrometer, and ideally a maximum differenceĪcross the tread of 9C. The optimum tread temperature range is between 85C and 95C The R888 has a semi race construction (very stiff) and a race treadĬompound. Pressures and how to achieve the best from our tyres when taking part What I would like to do is to offer some advice on tyre temperatures and Worked with a couple of cars using our R888 tyre regarding pressures and I was at Rockingham on the Saturday 1st March at the LOT trackday and My name is Alan Meaker, I am the Motorsport Manager for Toyo Tyres (UK)
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