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Old 02-04-2020, 04:07 PM #1
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2 observations

I'm 2 months in on the 2020 T4R Venture (Canadian Edition) and I've noticed a couple strange things I thought I would mention:

1. There is a red spot on the tires, right where the valve stem is. Are the tires balanced so that the wheels don't need to be?

2. I set the tire pressure in all four tires to exactly 33 PSI (yes, I know its supposed to be 32 but I thought the ride was a little soft) and then I reset the TPMS to use the current pressure as the default. When I start driving, it shows all 4 tires as 33 PSI (good) but then something strange happens, and it is always the same. The front driver side tire is first to go up 1 PSI, then the rear driver side, then the front passenger, then the rear passenger. There is 1-2 minutes between each jump, and this starts all over again (after a little delay) with the front driver side going up another PSI. I get that they will all fluctuate, but its odd that is always follows this pattern.

Bonus observation: The Canadian version of the Venture has TRD Off Road on the C pillar, but the US version doesn't. Seems like a strange thing to change.
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Old 02-04-2020, 04:16 PM #2
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According to Yokohama, a red mark on a tire indicates the point of maximum radial force variation (RFV) and should be aligned with the wheel assembly's point of minimum radial run-out. A yellow mark indicates the point of lightest weight and should be aligned with the valve stem on the wheel assembly.

It's a starting point for whoever mounts the tire but the whole assembly should be balanced and checked for RFV after they are mounted.
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Old 02-04-2020, 04:33 PM #3
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tire pressure normally fluctuate when the tires warm up, fronts normally before the rears or if you put more load on one side more than the other, that side will rise first. normally go up between 2-4 psi
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Old 02-04-2020, 08:39 PM #4
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Quote:
Originally Posted by shdw03 View Post
tire pressure normally fluctuate when the tires warm up, fronts normally before the rears or if you put more load on one side more than the other, that side will rise first. normally go up between 2-4 psi
Yeah, hitting the brakes a few times will also warm the wheels/tires up as the rotor sheds heat. Maybe one side is grabbing a bit more than the other.
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Old 02-04-2020, 08:52 PM #5
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Quote:
Originally Posted by jimgsmith View Post
...I get that they will all fluctuate, but its odd that is always follows this pattern.
The pattern is probably from the system refresh rate. It may not be as “real-time” / refreshed every micro second since anything not a catastrophic leak can readily be captured with readings every few minutes.
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Old 02-05-2020, 01:12 PM #6
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Doesn't the left front axle spin while the passenger side does not while part time 4WD is disengaged? Axle spin could be creating more heat in front left first...

Just a thought.
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