Tire pressure over or under - which is better? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 19 Old 08-10-2018, 10:52 AM Thread Starter
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Tire pressure over or under - which is better?

Several days a week I will drop my daughter off at school on my way to work. What that means is that part of the ride is 2-up and the rest solo. So my question is, with a 6 psi difference between the solo versus 2-up recommendation for the DL650, am I better to air up the tires to meet the 2-up spec, the solo spec or something in between assuming that the journey is split equally between the two scenarios?
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post #2 of 19 Old 08-10-2018, 11:09 AM
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Depends on how much weight change there would be between your solo and 2-up riding(Notice how I didnt ask how much you or your daughter weigh?)
In any case, I'd rather have the tires over-inflated than under.
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post #3 of 19 Old 08-10-2018, 11:13 AM
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If the first part of the trip is 2 up, why not inflate to the 2 up spec before the trip and then deflate to the 1 up spec after you drop off the daughter... that way you only have to carry a pressure gauge but not a pump. But if you have to choose between the two my guess is it's better to inflate it to the higher pressure.
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post #4 of 19 Old 08-10-2018, 12:48 PM
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there are many different thoughts

tires with less pressure warm up quicker and generally have better traction, when yer riding 2up, you may not ride as fast which makes the tires warm up slower. If its just a short trip, I'd consider the lower solo pressure, just to have best available traction (braking distance)
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post #5 of 19 Old 08-10-2018, 01:39 PM
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Adventure riders go many hundreds of miles on dirt with deflated tires and fully loaded bikes, and the tires do just fine. You will be OK riding with the solo weight set.
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post #6 of 19 Old 08-10-2018, 02:12 PM
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Is riding with deflated tires on dirt the same as doing so on dry pavement?
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post #7 of 19 Old 08-10-2018, 03:17 PM
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I really wouldn't sweat it. I've had my girlfriend on the back for many thousands of miles, and I didn't fuss with the pressure. I ran 42psi full time, and my tires last just fine, no noticeable difference in stopping ability.
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post #8 of 19 Old 08-10-2018, 03:46 PM
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Understood. The solo or dual psi for my '14 DL1K is 42 either way. The OP didnt talk weights or distances. Too many variables to give a concrete answer. He shouldnt, and probably won't have a problem either way, but nobody can guarantee that.
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post #9 of 19 Old 08-10-2018, 06:33 PM
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Set in the middle and fugedaboudit.
Extra weight will heat the tires a bit faster and get to the recommended psi
Harder tires = better gas mileage.

Once you get a real time TPMS you soon realize fine tuning a cold tire is pretty much useless once a tire warms up.

Over pressure at cold tho can get nasty when hot, skittish....ask me how i know
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post #10 of 19 Old 08-10-2018, 08:11 PM
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When you figure that biggest reason for the 2-up pressure increase is to reduce excess deformation - which caused more heat - which causes more wear - and the fact that your starting cold and slow for the first leg of your trip anyway, I wouldn't worry about adding extra pressure unless your route to school is quite long. With the extra pressure, your tires will spend much more road time over-inflated and wearing accordingly - with a reduced contact patch - and harder ride - than they will underinflated and warming up ever so slightly.
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