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FJR Motorcycle Forums
Technical & Mechanical Problems
Suspension Tuning - It's a Process!
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<blockquote data-quote="MCRIDER007" data-source="post: 1340282" data-attributes="member: 329"><p>Regarding tire pressure and tire carcass, motorcycle tires are designed to heat up thru sidewall flex which raises internal temperatures and pressure until the sidewalls no longer flex. The lower the starting pressure, the more the tire has to heat up until the sidewalls no long flex. Lower starting pressures result in higher operating temperatures and more traction....but shorter tire life.</p><p></p><p>I used to run 36/38 in my ST1100 until a Bridgestone tire representative told me to run 40/42 if I wanted a 20-25 percent longer tire life. He also said I would have 95 percent the traction at the higher starting pressures. There wasn't any way to verify the traction but he was right on regarding the tire life.</p><p></p><p>I think the 10 percent rule (difference between cold and operating pressures) is a good rule of thumb for sport-touring tires to maximize tire life while still maintaining adequate traction.</p></blockquote><p></p>
[QUOTE="MCRIDER007, post: 1340282, member: 329"] Regarding tire pressure and tire carcass, motorcycle tires are designed to heat up thru sidewall flex which raises internal temperatures and pressure until the sidewalls no longer flex. The lower the starting pressure, the more the tire has to heat up until the sidewalls no long flex. Lower starting pressures result in higher operating temperatures and more traction....but shorter tire life. I used to run 36/38 in my ST1100 until a Bridgestone tire representative told me to run 40/42 if I wanted a 20-25 percent longer tire life. He also said I would have 95 percent the traction at the higher starting pressures. There wasn't any way to verify the traction but he was right on regarding the tire life. I think the 10 percent rule (difference between cold and operating pressures) is a good rule of thumb for sport-touring tires to maximize tire life while still maintaining adequate traction. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Suspension Tuning - It's a Process!
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