Tire pressure


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purchelli
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Location: Auckland, New Zealand
Motorcycle: 2000 Goldwing 1500 GL SE

Tire pressure

Postby purchelli » Wed Jan 06, 2016 7:24 am



I have just replaced my Metzlers which were badly cupped due to under inflation with a set of Avon Cobras. The munufacturer recommends 42 PSI rear and 36 PSI front for the Avons. After some discussions on this forum a month or so ago regarding vibration, bike weight and tire cupping several experienced Goldwing riders on this forum recommended I run the front and rear at 41/42 PSI. The guy in the tire shop seemed surprised at that and pointed me to the manufacturers recommendation. NZ summer daytime temperatures range between 70F and 84F. Is 41 PSI too much for the front tire?? Your comments please.



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tfdeputydawg
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Re: Tire pressure

Postby tfdeputydawg » Wed Jan 06, 2016 8:54 am

41/42 started with someone, somewhere that thought that was needed for the front tire on trikes, IMO. Tried that on my first tire on my trike. It resulted with a very harsh front end!!!!
Lowered pressure to 36 on my 2nd front tire and am very satisfied thus far.

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WingAdmin
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Re: Tire pressure

Postby WingAdmin » Wed Jan 06, 2016 10:03 am

I used the manufacturer's inflation for my first set of Avons on my GL1500, and they cupped quite badly long before they were worn out, and I ended up replacing them with almost exactly 12,000 miles on them.

I now use 41 psi in the front and 47 psi in the rear. I will bump up the rear to 50 psi when pulling the trailer, or with a passenger and luggage. I've now got 7,300 miles on this set, and they are wearing very well - no sign of cupping.

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thrasherg
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Re: Tire pressure

Postby thrasherg » Wed Jan 06, 2016 3:22 pm

I run my avons at 42psi front & 48 psi Rear and like them, no cupping and 14,000 miles later there is still a bit of wear left in them, but will change them soon. Never had the front slide or feel harsh, but I do have progressive suspension front & rear so that might help. It gets quite hot here in Texas and I have never found 42psi to be excessive so i would go for it. It's always easy to let a bit of air out if the ride feels harsh or odd.. I would strongly suggest that you do change the pressure by 5psi, just to get a feeling for the effect and see if you like it or not. You can always put the air back in if you don't like it. I would not go softer than 35psi on the front as the wing is a fat girl and can roll the front tyre in bends (when pushed) and that is not a pleasant feeling!!

Gary

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wingman12
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Motorcycle: 1999 gl1500 se

Re: Tire pressure

Postby wingman12 » Wed Jan 06, 2016 3:42 pm

I have never used any tires on my 99se other than Dunlap 111. I have always wither solo or double, keep the tire pressure 3 lbs below the max pressure stamped on the tire. normal change of tires is 20 to 25,000 miles or every other year which ever comes first. I currently had 148,000 when put bike to sleep for the winter. :D :D

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PastoT
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Re: Tire pressure

Postby PastoT » Wed Jan 06, 2016 3:52 pm

I run E-3s and at their specific max pressure (41/44). The pressure I use and the 41/42 psi mentioned above may not be appropriate for your specific tires, so use caution but refer to the MAX PSI on the tire itself. I'd also suggest running balancing beads. E-3s are notorious for cupping and feathering and of course singing to the pilot as they wear. I've delayed the onset of tread wear on my E-3s by running max psi and balancing beads seem to have further extended my tire life. Rider beware - higher PSI means harder tires and a rougher ride, its a balancing act more tire expense or softer ride, they are mutually exclusive of one another.
Tom, in Mountain Home, Idaho
2002 GL1800 (Illusion Red) Non-ABS, 108k miles
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bstig60
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Re: Tire pressure

Postby bstig60 » Thu Jan 07, 2016 9:36 pm

I run Kenda Kruz and run 36 front and 38 rear. Keep in mind tire temperature is going to rise significantly as the tires heat up. That's why the manufacturer recommends checking the pressure COLD. I am using Dyna-Beads and run a tire pressure/temperature monitoring system. I currently have just over 17000 miles on my tires with no signs of cupping of any significance. They do talk to me a bit at 45-50 MPH.
Bill

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Dusty Boots
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Re: Tire pressure

Postby Dusty Boots » Fri Jan 08, 2016 5:19 am

IMHO, a little harsher ride is a very acceptable trade off for increased tire life, less cupping, quicker handling traits and cooler running tires.

On my E3s, I run 42 PS! front and 44 PSI rear and generally get 39,000 km/25,000 mi out of a set of tires. I have gotten as much as 45,000 km/28,000 mi out of a set

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tfdeputydawg
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Re: Tire pressure

Postby tfdeputydawg » Fri Jan 08, 2016 5:42 am

Dusty Boots wrote:IMHO, a little harsher ride is a very acceptable trade off for increased tire life, less cupping, quicker handling traits and cooler running tires.

Would be OK if all those results of higher pressure were correct!
My experience at 41psi in the front resulted in severe cupping, even the tire ripped at the ends of the tread grooves and an extremely harsh, pogo stick ride. Tire required changing at 17,000 miles!
This is on a trike and the tire was a BT45 reverse mounted.
7,000 on the new tire, run at 36psi. No cupping and a smoother ride thus far.

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Dusty Boots
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Re: Tire pressure

Postby Dusty Boots » Fri Jan 08, 2016 7:41 am

A trike is not the same as a bike. A bike leans in the turns as a trike stays relatively flat!

BTW the Stone Battle AX BT45 was the worst front tire I ever tried. Cupped early and hunted every little groove/tar snake/surface imperfection within 10 miles!
I stand by my observations as experienced by my many thousands of miles of real world experience on a BIKE




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