Tyres - Cold to Warm Pressure Difference

[dh110953]

So, the manual states 2.9 bar rear and 2.7 bar front (1250RT) on cold tyres: So I inflate to the 2.9 and 2.7 using a relaible gauge to check pressures. Of course the on-board tyre pressure monitors/sensors dont work until the bike has been riden a while, so unable to check what the TPM system claims. When the bike has been riden a mile or two the pressures show on the TFT Display as 3.1bar rear and 2.9bar front (or thereabouts) but of course the tyres have warmed up by this point to the pressures will be higher than when cold. Question is, what should be the best settings as displayed in the TFT Screen assuming the bike has been riden, tyres warmed up and the outside temperature circa 21 degrees (UK).

Any tyre experts out there who can advise...put my mind at ease.

[BoB21]

dont go by tpms they arer there to inform of puncture.

[simbo]

Tyre pressure should be 2.9 rear, 2.5 front. Go off your gauge not tpms.

[Doctor T]

Always go by the cold pressure. As the tyre and the air pressure warm up the more you ride. If checked while warm you may put more air than needed.
My TPS is pretty accurate but i always refer to my pressure gauge to make sure.

[David.]

Using dry nitrogen not moist air in tyres will reduced the cold to warm pressure difference.

[Doctor T]

Using dry nitrogen not moist air in tyres will reduce the cold to warm pressure difference.

Can you still get nitrogen at tyre dealers? Haven't seen anyone offering it for years.

[David.]

ATS Euromaster have 250 centres which offer nitrogen tyre inflation, https://www.atseuromaster.co.uk/service ... -inflation

[Tenequip]

My R 1250rt 2022 gets the tire pressure after about a couple hundred yards and holds that same pressure through out the ride. So l use that set pressure in the cold tires difference from spec pressure to adjust the tires on the road. So if it needs adjusted on the road I can stop at air pump station and add the difference needed and this seems to work fine.
Tenequip

[Mac001]

The tyres on my 2019 are measured at 20 degrees centigrade as a reference. That attached picture comes from the manual page 140 for my bike year. Other pages say set it cold but it is only when you get to this page that it explains how the system works. I have a really accurate gauge and at 20c it was spot on.