Mallala track/race May 26 & 27?

[Rorz]

My understanding is the air in the tyres expands as the tyre warms which increases the tyre pressure as the temperature rises. For this reason, the hotter the ambient/track temp, the lower you should have the tyre pressure set as the extra heat in the tyres will mean the pressure will continue to rise out on track (to temps higher than when on the warmers) and should end up where you want it anyway. It's best to set the pressures at full temp on the warmers, then again as soon as you come in from a session to make sure they are at optimum pressure while you are actually riding.

In cold weather, if you set the pressure as low as 26 at full temp on the warmers then go out and the track temp is real cold and you get held up by slower riders, by the time you get the hammer down, the tyres could be half the temp as when they were on the warmers and dangerously under-inflated.

[Anon]

Can't help but think of seinfeld with this....raise the feet, get blood to the head..no raise the head get blood to the feet.

A bit of interwebz trawling just makes it more confusing as both views are given....on a cold day raise the cold pressure to maintain optimum track pressure.....no! on a cold day lower the cold pressure to get optimum track heat.

Perhaps I should hedge my bets and run 40 front, 20 rear...that evens it out....right?

(btw I'm talking stone cold temps, 26psi in warmers would be about 21 cold)

[old blue]

Well, I see the forecast is now a nice even top of 16 degrees with scattered showers on both days.

It's a bloody good thing we all know it never rains at Mallala, or I might be a bit daunted by that.

So who's grown a pair and committed? I am 100% there, both days.



O.B

[xrilek]

I'm thinking about the weather plus no one is free to pick the bike! :(

[xrilek]

....So,who was brave enough and risked it??

[TwoWheeledWonder]

Yeah I want to see some pics of Blue dragging helmet.

[xrilek]

....anyone??

[Davidr]

Was scared off by the rain though looking out Saturday I am guessing it wasn't too bad.

Pity, as I was keen to try out my new GPS lap timer. Made some use of it instead by carrying it in my pocket when I went running so I could track how far I went and how slack I am - so at least I have got that part of the software sorted.
(Pity it's a different program for lap time analysis)

[TwoWheeledWonder]

Originally Posted by Davidr

Was scared off by the rain though looking out Saturday I am guessing it wasn't too bad.

Pity, as I was keen to try out my new GPS lap timer. Made some use of it instead by carrying it in my pocket when I went running so I could track how far I went and how slack I am - so at least I have got that part of the software sorted.
(Pity it's a different program for lap time analysis)

I bet that RSV does awesome on the track. I am still jealous of that bike, it is my top pick if I ever go to a liter bike.

[xrilek]

Originally Posted by TwoWheeledWonder

I bet that RSV does awesome on the track. I am still jealous of that bike, it is my top pick if I ever go to a liter bike.

Same here! I told that to David the last time I saw him at the track!