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Air pressure VS. Tire wear
I notice, many folks suggest, and are - running 22lbs (or so) of air pressure in the rear wheel - to make it a "better" ride. I'm sue it would soften out the bumps, but what about the tire wear on the rear. I am certain, if the correct pressure is not maintained - cupping, side, or middle tire wear comes as a result. Thoughts?
Be the Man - your Dog thinks you are.
My thoughts are how about updating the thread you started about the car with the 6 bad coils!
2017 Harley Davidson Freewheeler (107 cu.in. vivid black).
With my 2011 Tri-Glide stock tires [rear] i had them at 22/23 PSI And when i traded it in at 45 thousand miles they still had plenty of thread left....And the thread ware was even across the whole tire..The stock tires are Mud and snow rated and basically car tires..Over kill for a 13 hundred+- pound trike...Originally Posted by Thomas L
Sometimes a Cigar is Just a Cigar.....
2019 Tri-Glide.......
Dunno Thomas... I run 24# in the rear on my GL1800 MotorTrike IRS. That is the recommended cold-start pressure for this trike. Ride is fine and tires are fine. Maybe its the difference in the Harley solid axle that people are dealing with or maybe other solid axle kits. The GL 1800 Lehman Monarch II we had was a solid axle trike and we ran 24# in the rears on it too - no problem with ride or tire wear.
New course heading Mr. Sulu: ...2nd star to the right and straight on til morning...!!
Scooter and Sassi....2 furrever.
With a solid rear axle both tires travel in the same plane
If your shocks are good you should not see cupping
Nor center tread wear, that is common with Over Inflation
Heat is a bigger factor along with rolling resistance
The tires may heat up being lower PSI, along with more rolling resistance
Your Ride, you decide JMO
Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 37 years)
Current ride : 2021 FREEWHEELER M8, oldest ride 1960 FL
Lest we forget, the recommended tire inflation of 26 pounds was an arbitrary decision by some tire safety council when they amended their charts. Previous to that, I think the recommended max tire pressure was something like 22 pounds. Just the changing of a chart caused manufacturers to have to follow guidelines that made no sense for trikes or our particular application. I run 21 most of the time with no passenger and the ride is vastly improved in concert with my DK Custom Custom Lift Kit on my 2017 TGU.
If you want to know the sordid history of the tire pressure debacle, go to Lehman's PDF:
http://www.lehmantrikes.com/assets/d...ook-master.pdf
The rear tires are basically car tires expecting a weight of 1500 to 2000 pounds. At that weight yes you would get the tire wear you would expect, low press outside edge wear high press center wear. The trike has 500-750 on the rears? There is really no weight on the tires compared to a car so all the expectations go out the window because there is no stress on the tires. Maybe high pressure would wear out the center but the rest doesn't happen. At least that's the way I see it.
Re - Pressure and Daughters car.
Good answeres. I'm going with the 24/24 lbs. pressure. Daughters car. Seems when the main ECM/PCM goes out - it can often "fry" all six coils, at once. Going to pull the ECM, and have it "re-ferbished". ($375 VS $900 ) Plus 6 coils -- Oh Well.
All of that makes "Tire Pressure" seem so easy.
Be the Man - your Dog thinks you are.
I run 21 psi in my Freewheeler rear tires when riding solo and 23 psi when riding 2 up. At 24,000 miles I still have a lot of tread left and there is no uneven wear, cupping etc.
Sunman
I dropped to 24 psi on the rear tires & 15 psi in the air shocks.
I set the front at 34 psi because after almost 4,500 miles with 36 psi in it, it just seemed to me to be over inflated and getting excessive wear in the middle. After 500 miles at the new pressure, I am much happier.
2017 Harley Davidson Freewheeler (107 cu.in. vivid black).
As others have said, the back tires are so under-loaded that I doubt you can wear them out from lower pressure short of running them flat. Has anybody here ever wore out a back tire on a Tri-glide???
I don't mind running the rear tires on my TG under recommended pressures. The only issue could probably be overheating and due to the light load that isn't going to happen. I still playing around with my new front tire because it was completely worn out before 15,000 miles.
Current: 2019 Trike (custom 130ci T-Man kit with Darkhorse bottom end)
Tire ware in the rear is not the concern , it’s DryRot you will be concerned of.
2012 Triglide Piaggio MP3 500 to get groceries 1991 FLHS as back up
"Better to have it and not need it than need it and not have it !"
Tiffany, Olive, Daisy, “The Three Musketeers” together again.
Very strange a ECM could fry all the coils, HMMMMGood answeres. I'm going with the 24/24 lbs. pressure. Daughters car. Seems when the main ECM/PCM goes out - it can often "fry" all six coils, at once. Going to pull the ECM, and have it "re-ferbished". ($375 VS $900 ) Plus 6 coils -- Oh Well.
All of that makes "Tire Pressure" seem so easy.
Guess it could happen, have the coils been tested?
Possible a bad ECM cannot signal the coils could save some bucks
Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 37 years)
Current ride : 2021 FREEWHEELER M8, oldest ride 1960 FL
I run 21-22 psi in my rear tires. At this psi I get the best ride quality out of the stock tires, and it gives them about a 60K-65K mile life.
I have noticed two counter-intuitive things-
1. I have let my psi get low a couple of times (16-17 psi) and the ride quality was WORSE. My guess is that the sidewalls had so much flex that it made it "bouncier" than with the 21-22 psi
2. My rear tires wear a bit more in the center than the outside edges...something I would expect to see from over-inflated tires. Only thing I can think of is that when I spin the rear tires (which I do a lot of...cause it's fun) they "grow" and that is the reason for the extra center wear.
Kevin
#2 makes sense to me
Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 37 years)
Current ride : 2021 FREEWHEELER M8, oldest ride 1960 FL
I tried around 15 psi on my 2011 T/G Once and only once, Like you said sidewall flex,
I came around a sharp curve at a good clip and it felt like the tire was going to come off the rim [Bead]
Sometimes a Cigar is Just a Cigar.....
2019 Tri-Glide.......
Tires
I just recently swapped out mt stock rear tires witn 80 thou. miles on them / still hadAs others have said, the back tires are so under-loaded that I doubt you can wear them out from lower pressure short of running them flat. Has anybody here ever wore out a back tire on a Tri-glide???
some tread left but being born in 2010 I figured it was time for a a NEW SET. Happy
with stock Dunlops
I'm running 14 in the LR and 16 in the RR because of our crown of the road. They have 30 K on them and still look good, very even and lots of miles left. I worried about flex and tires rolling off and asked several folks to watch for it in the twisties but they couldn't keep up enough to look. I use the rear brakes in tight corners and notice some minor sliding but no rolling.
I ran the recommended tire pressure on a 2010 triglide. Around the 20K mark I noticed the center of the tires were wearing faster then the rest of the tire so I dropped the pressure to 24. I replaced the tires at 40K because the centers had less than 2/32 tread left and were starting to slip on sandy/wet road surfaces. When I traded this trike in on a 2018 triglide it had 82K and the tires still had plenty of tread. Lesson learned.
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