R1200RS + R1250RS Forum
»
1250 RS technology
»
Tyres, Brakes and Suspension
»
Setting tire pressure for a given cold temperature
Print view
Mon Jan 11, 2021 4:41 am (Last edited: Mon Jan 11, 2021 4:46 am)
|
Since the tire pressure displayed on the dash is corrected for a temperature of 68°F, the pressure you set into your tires needs to consider their temperature, if you want to display the desired front 36.3 psi and rear 42.1 psi (for 68°F). |
|
reply
|
Hi Jerome, |
|
|
I typically set my tire pressures at a temperature of 60 degrees. Because I am not carrying any load other than a 155 pound rider, I set the tire pressures of my 2016 RS at 36 psi front and 40 psi rear. I have found that while riding at temperatures of between 35 degrees F and 80 degrees F, the tire pressure display stays within 1 psi of what I measured when cold in the morning. So in my case the tire pressure measuring system seems to be very well calibrated and is working as designed.
Current motorcycle collection: 2002 Yamaha FZ1; 2020 KTM 390 Duke; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh
|
|
|
Good read here |
|
|
|
Zitat von DC im Beitrag #4 All pretty obvious but too much of a faff for everyday riding in a temperate climate. In the last week, daytime temperatures have varied from 20C to 5C depending on whether the prevailing wind is from the NE or SW. I tend to pump my tyres to the 36/42 default and then they will drop a few psi over the next few weeks until I can be arsed to pump them up again. I'm not trying to break the lap record on a race track and there are so many other variables that affect grip. Of course we always blame the tyre not the road surface or that we were maybe riding too fast or just took the wrong line in a corner! |
Thu Apr 08, 2021 12:33 pm (Last edited: Thu Apr 08, 2021 2:10 pm)
|
Either my TPS over-reads or my tyre garage, who are pretty reliable and highly recommended, have gauges which under-read. Following repair of a slow rear puncture by them I am currently on 44/37 or thereabouts. Within reason I find that a 6 psi difference front-rear works well and I currently tend to operate 44-42 and 37-35 before adding more air. That probably means I am doing exactly the same as Wessie! 19 Plate R1250RS Exclusive with "bells & whistles" & full colour matched luggage |
|
|
|
Zitat von PlacidoD im Beitrag #6 tyre pressure gauges at tyre dealers and garages are notoriously crap. They get so much use, never get calibrated so will be very worn. A conscientious fitter will use a separate calibrated pocket gauge to check their work but that would be in a parallel reality. I have an Avon branded pencil gauge my father picked up at a trade show in the 1960s. Beautiful quality and of course, being Avon, still works perfectly. It only gets used a couple of dozen times a year on my 8 tyres so has never worn out. |
Thu Apr 08, 2021 8:29 pm (Last edited: Fri Apr 09, 2021 12:55 am)
Zitat von wessie im Beitrag #5Zitat von DC im Beitrag #4 Spot on. There's far too time wasted on the dash tyre pressure display. Some of us stick with the book figures of 36/42 every day, while some of us may adjust lightly based upon our experience with different loads and speeds. After I've checked and set my tyres at ambient temperature before a ride I don't give a hoot what the dash is reading. The dash numbers are almost meaningless. Yes, I've RTFM and stopped worrying about "temperature adjusted readings, Blah, Blah, Blah". For me the dash tyre pressure data only serves 2 purposes - (1) let's you know you've got a blow out, though when I picked up a catastrophic rear puncture (no plug could fix it), I felt the bike squirm before the dash warning appeared and (2) will give a warning if your slow puncture reaches a very low pressure; again my slow puncture was very slow so I was checking it frequently during a 3 day ride and luckily my little pump saved the day (was middle of the night actually) when garage airlines were removing more air than they were putting in. Carpe Diem! |
|
|
"For me the dash tyre pressure data only serves 2 purposes - (1) let's you know you've got a blow out, though when I picked up a catastrophic rear puncture (no plug could fix it), I felt the bike squirm before the dash warning appeared and (2) will give a warning if your slow puncture reaches a very low pressure; again my slow puncture was very slow so I was checking it frequently during a 3 day ride and luckily my little pump saved the day (was middle of the night actually) when garage airlines were removing more air than they were putting in." |
|
|
I bought and use this tire for the bike. It has been checked by two separate calibrated tire gauges and was less than 1/2# off both of them. rhinousainc, a google search will bring you to their website. |
|
Fri Apr 09, 2021 6:41 pm (Last edited: Fri Apr 09, 2021 6:43 pm)
Zitat von L2RKE im Beitrag #11 Alerted you to what?
Carpe Diem!
|
|
Fri Apr 09, 2021 9:08 pm (Last edited: Fri Apr 09, 2021 9:46 pm)
Zitat von Mr. 36654 im Beitrag #13 If you want a more precise method for checking the accuracy you can purchase a master test gauge or take your gauge to a local tire dealer or fleet truck maintenance facility and ask them to check it using a master test gauge. My tire changer has his tested and calibrated once a year. The more you use a gauge, the less accurate will be at some point. The mind is the limiting factor |
|
|
|
Zitat von azqkr im Beitrag #14Zitat von Mr. 36654 im Beitrag #13 I apply the same rationale as above. Why bother when there are so many other variables that affect tyre pressure and grip? Unless you are on a professional racetrack you are not going to produce a table of optimal tyre pressures requiring a calibrated gauge. Buy a gauge, set a pressure and go for a ride, just like the chap in the video. If it feels right, use that as a base. Once something does not feel right, check the pressure and tyre condition. The seat of your pants is the best measurement device. |
