Tire Pressure ??

General discussion of the BMW R1200RT/R1250RT
Post Reply
User avatar
Randyjaco
Posts: 182
Joined: Thu Nov 11, 2021 3:18 am
Location: Friendswood, Texas, USA
Bike Model and Year: R1200RT 2017
Has liked: 36 times
Been liked: 37 times
United States of America

Tire Pressure ??

Post by Randyjaco »

I was inspecting my tires today (Michelin Road 6). For the first time ever, I noticed the maximum tire pressure is 42 psi. BMW's recommended cold rear tire pressure for my bike is 42 psi. That is not a problem when my tires are cold. On some of those hot Texas days, on my TPM, I have seen the that pressure rise to over 46 psi. Is this something I should be concerned about? I would prefer not to be stopping every hour to adjust tire pressure. 8^( I am hoping that that maximum is calibrated to reflect Boyle's law. Does anybody have any educated thoughts on this?
User avatar
David.
Subscriber
Posts: 8006
Joined: Fri Nov 07, 2014 7:29 pm
Location: North Yorkshire
Bike Model and Year: R1200RT (Camhead) 2012
Been liked: 332 times
Great Britain

Re: Tire Pressure ??

Post by David. »

Image

The maximum load – here it’s 365kg – is the most the tyre can support at a standardised pressure – in this case 42psi.
User avatar
sakm
Administrator
Posts: 1297
Joined: Wed Jun 02, 2021 9:13 pm
Location: Hull, UK
Bike Model and Year: 2016 R1200RT
Has liked: 433 times
Been liked: 388 times
Great Britain

Re: Tire Pressure ??

Post by sakm »

as above

Its cold tyre pressure :thumb:
User avatar
David.
Subscriber
Posts: 8006
Joined: Fri Nov 07, 2014 7:29 pm
Location: North Yorkshire
Bike Model and Year: R1200RT (Camhead) 2012
Been liked: 332 times
Great Britain

Re: Tire Pressure ??

Post by David. »

The 42psi is not a maximum pressure, it's the load which is a maximum at that standard cold pressure.

Here's another example, different type of tyre and max. load but the same standard 42psi.

Image
User avatar
Randyjaco
Posts: 182
Joined: Thu Nov 11, 2021 3:18 am
Location: Friendswood, Texas, USA
Bike Model and Year: R1200RT 2017
Has liked: 36 times
Been liked: 37 times
United States of America

Re: Tire Pressure ??

Post by Randyjaco »

Thanks guys. I presumed as much, but just thought I would ask.
Post Reply