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Bridgestone Re55 Track Pressures

260DET
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260DET Experienced

260DET

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For a 1300kg two wheel drive car doing five lap sprints. Reason I ask is that I've never used them before and previous experience with Kuhmo's involved a fair bit of experimentation getting them right.

So any cold/hot suggestions, any tricks? Won't be able to do the proper heat cycling at the start, unless running them on the road with low pressures will do that.

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scathing Grand Master

scathing

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Posted

What time period will they be driven for? 5 laps on one circuit can take twice as long as on another, which means the amount of heat generated will differ.

Assuming a 1:45 lap (which is about average for most of the track times I've seen) I'd probably go for around 28-30psi cold. Its the hot pressures which matter the most, so as soon as you park the car up check your tyres. I normally aim to have my RE55S' at around 32-34psi when I come off the track.

Gav Mentor

Gav

Posted
Posted

There is no "absolute" answer to this as there are many variables, even with the same car.

A tyre pyrometer is your friend here and will give you instant feedback as to what your surface contact patch looks like. I got a Longacre unit from USA for ~$100 delivered and since then I have lots of "friends" on track days :(

Duncan Grand Master

Duncan

Posted
Posted

I aim for 34 hot. on a low power 32 gtr doing 15 min sessions it is generally:

-8 front outside

-6 front inside

-6 rear outside

-4 rear inside

try that as a starting point, and check pressures after 2 flat out laps without a cool down.

260DET Experienced

260DET

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  • Author
Posted
which kumho's? I'm thinking about a set for the next track nugget but it weighs around 1050 so was considering a softer compound..

i assume 22 is cold pressure?

V70A's, they have a very stiff sidewall. Yeh ~22 cold.

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