R1200RS + R1250RS Forum
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Sun Nov 08, 2020 2:56 pm
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Zitat von azqkr im Beitrag #16 Your master mechanic is a chap who knows how to use a spanner and then how to use a book to service a BMW bike. I doubt that he is a Tyre designer with Metzler on the weekends. His opinion is as valid as anyone else's but not necessarily worth any more.
2020 R1250RS, 2018 Ducati 939 Supersport, 2018 Ducati Monster 821, 1967 Ducati 250 mk3.
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Zitat von himoverthere im Beitrag #8 The apparent reference for the BMW values is 20C or 68F. Standard Temp and Pressure is a bit of problem. The ISO standard temp is 15C, the US NIST standard temp is 20C or, in some cases, 25C. Tire Pressure - STP.png - Bild entfernt (keine Rechte)
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Zitat von wessie im Beitrag #7Zitat von pauld im Beitrag #6 That's a lot of space to say ........... Pressure_temp2 = Pressure_temp1 x (Temp2 + 460)/(Temp1 + 460)
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Zitat von Batts im Beitrag #1 ...and don't forget - manuals are online and downloadable..... Go here: https://www.bmw-motorrad.com/en/service/manuals/rider-manual.html You will normally receive a manual with your vehicle. If you do not have access to this for any reason, you can also download it as a PDF. This will allow you to familiarise yourself with your machine and the important information concerning its operation. It will also provide you with important information related to maintenance and care. Simply enter your chassis number into the search field and search for your exact model, or download your manual directly from the model selection screen.
“A good man always knows his limitations.”
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Zitat von Ali-bear im Beitrag #22 TPMS sensor should include a thermocouple or similar sensor for real-time temperature measurement. So, with that info and the real-time internal pressure, you can calculate the pressure at STP. Using an external gauge, you're a bit screwed unless you have an internal temperature measurement.
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Zitat von himoverthere im Beitrag #17Zitat von azqkr im Beitrag #16 He's worked on beemers for 30 years, and thousands of bikes in that time, he's forgotten more about these bikes than you'll ever know. And he's seen more tires roll through having used various pressures and the resultant problems than you'll ever have a chance to see. He doesn't have to be a tire designer, he's seen results of using various tire pressures on these bikes. Don't be a douche |
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You just don't understand. Someone who works for a BMW dealer, or their manager, or the area manager does not know more than BMW themselves who do the R&D and spend millions on getting things correct. They do all the research and write the owners manuals and the handbooks. 2020 R1250RS, 2018 Ducati 939 Supersport, 2018 Ducati Monster 821, 1967 Ducati 250 mk3. |
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Zitat von himoverthere im Beitrag #11Zitat von Ray im Beitrag #9Zitat von himoverthere im Beitrag #8 I'm genuinely interested. “According to an early edition of 'the Guinness book of world records' the X15 also holds the record for fastest landing speed at 242 mph compared with 210 mph for the space shuttle.” |
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Zitat von himoverthere im Beitrag #25 You don't understand, he's seen the results of various users using various pressures. The end results are actually documented results of under inflation. Nor does he work for a dealer, or a dealers manager, he is THE owner with 30 years of servicing beemers. He bases HIS opinion on decades of seeing the results of various tire pressures used. His recommendations are based on evidence, not some tech or tire researcher. As an aside, when I threw the Heidenau's on the GS for a trip to the arctic circle, I called their lead distributor in the US. Gave him weight of rider, total weight of gear going and he stated run them higher than what most recommend [ something like 42/38 ], based on weight of machine/rider and gear loaded. He mentioned most people run their tires underinflated and they've seen theend results of that themselves over the years. So two pros, with opinions based on hundreds if not thousands of results of various tire pressures used. I called you a douche, because you ASSumed something [ actually several things ] not in evidence. He doesn't work for a dealer, or a manager, he owns the place and has decades of experience in seeing results of various tire pressures used by thousands of customers |
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Zitat von Mr. 36654 im Beitrag #14Zitat von Boxerboy im Beitrag #12Zitat von Batts im Beitrag #1 That's closer to and more in line with my own mechanics opinions as well. |
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