Are we looking to gain about 10% from cold tire pressure to hot for street?
I am a fan of starting with the MFG recommended pressure (measured cold..after sitting overnight). From there I like to ride a good 3-5 miles to get them warm and take a pressure reading, and a spirited run to get them at full temp and then another pressure check.
(Tip: I put a piece of duct tape on the wheel to document from cold <start/intermediate and ending pressures> written on the tape).
From there I will make an adjustment by dropping the pressure 1-2 lbs and repeat the measurements. This gives me an idea of what the tire will behave like and allow a comparison of pressure rise.
Ideally, pressure from cold to hot should be 5 - 7 lbs.
More = overheating, potential to get unpredicatable and have negative grip affects
Less = not coming to optimal temp for grip and safety
I would say 10% rise is a guesstimate based on starting and recommended pressures
Here I go with "FEEL" again.....
Everyone rides a bit different, surfaces are different, even the same turn an hour later is different due to changes in temp, introduced debris, oils releasing from tarmac, many other factors.
Once you find the "ideal" temp rise, you should be confident the tire is working, suspension following suit and your ride feels right...That is the "perfect" pressure. I am sorry that although there is science to say X:D/M=
.. the numbers are just numbers... you have to find the right feel for you.
Good info from folks smarter than me:
www.factorypro.com/tech/tire_pressure_risez.htmlIf there were a "perfect" setting, I would absolutely shout it on the roof tops. Problem is.....well the solution is....."you and only you" know what feels right and what grips best at that moment. Once you find the feel that gives you confidence....explore, correct, adjust and ride, ride, ride.
Some of the most advanced and absolute tech is attached to your machine via the lump inside your helmet holder and your gut.
If you find the perfect pressure/tire combo...let me know... and i'll share my map to the spot where unicorns fart fresh baked apple pie aroma.....god I wish it existed. And if it did, i'd never touch my brakes and run WFO without a care in the world. Point being, numbers are just numbers, riding isnt a binary process.
You get the idea..... save the "razors edge" for the track. Find what feels best and allows you to into each turn with confidence, applying brakes as needed, grin from ear to ear and savor the adrenaline.
Happy trails.
DG
.. the numbers are just numbers... you have to find the right feel for you.