Rubber burning


Information and questions on GL1500 Goldwings (1988-2000)
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Nonstop
Posts: 6
Joined: Fri Jan 02, 2015 8:13 pm
Location: Lafayette, La.
Motorcycle: 1989 GL 1500

Rubber burning

Postby Nonstop » Sun Feb 22, 2015 9:56 pm



Just put a new Avon Venom AM 41 120/90-18 on my '89 1500 Goldwing....what a beautiful ride New Avon's on both ends......took it out for a spin and everything went fine UNTIL I accelerated thru 60 mph.....smelled burning rubber !!!!!!!!!!! ...stopped but couldn't fine the cause.......the front fender clears the tire by only 3/16ths of an inch on the leading and trailing edge of the fender......at speed, the smell and a "slapping" sound can be heard....!!! Question: has anyone experienced this with other front tires..?? Can the tire distort it's profile at higher rpm's so as to come in contact with the fender......???? and lastly, can the fender be raised or alter to accommodate this tire....???? Any input would be greatly appreciated...
Thanks in advance
Robert



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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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Re: Rubber burning

Postby WingAdmin » Sun Feb 22, 2015 10:11 pm

Nonstop wrote:Just put a new Avon Venom AM 41 120/90-18 on my '89 1500 Goldwing....what a beautiful ride New Avon's on both ends......took it out for a spin and everything went fine UNTIL I accelerated thru 60 mph.....smelled burning rubber !!!!!!!!!!! ...stopped but couldn't fine the cause.......the front fender clears the tire by only 3/16ths of an inch on the leading and trailing edge of the fender......at speed, the smell and a "slapping" sound can be heard....!!! Question: has anyone experienced this with other front tires..?? Can the tire distort it's profile at higher rpm's so as to come in contact with the fender......???? and lastly, can the fender be raised or alter to accommodate this tire....???? Any input would be greatly appreciated...
Thanks in advance
Robert


Your problem is that your tire is too big. The correct size tire, 130/70-18, has the following dimensions:

Diameter: 25.2"
Width: 5.12"
Circumference: 79"
Revolutions/Mile = 801.8

Your tire, the 120/90-18, has these dimensions:

Diameter: 26.5"
Width: 4.72"
Circumference: 83.2"
Revs/Mile = 761.3

Your tire is almost an inch and a half larger diameter than the correct sized tire. That's why it's just barely clearing the fender. At speed, centrifugal force causes the tire to enlarge in diameter and narrow in width, so you lose what little clearance you have, and the tire starts hitting the fender.

Your speedometer is also going to read low with the larger tire. At 60 mph, your speedometer will be reading 57 mph.

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redial
Posts: 1993
Joined: Mon Jan 03, 2011 1:17 am
Location: Kapunda, SouthAustralia
Motorcycle: 1997 GL1500 Spectre Red Aspencade

Re: Rubber burning

Postby redial » Mon Feb 23, 2015 1:55 am

If ever you have watched drag racing, you will see them "warming up" their tyres. When they do, the tyre enlarges quite dramatically. These are the same forces at work, but to a much lesser extent, and you will get some enlargements as the tyres warm up and the speed increases.
Len in Kapunda

The world is not going to finish today, as it is already tomorrow in Australia and New Zealand, and other islands of foreign nations such as Guam and Samoa.

Nonstop
Posts: 6
Joined: Fri Jan 02, 2015 8:13 pm
Location: Lafayette, La.
Motorcycle: 1989 GL 1500

Re: Rubber burning

Postby Nonstop » Mon Feb 23, 2015 11:53 am

THANK YOU for the information input....Both of you confirmed what I thought was happening ...BUT was also hoping that I would find an easy way out ..... but back to the hand tools and switching the tire out......again THANKS FOR THE HELP.....!!!!

Don't grow old sayin' "I wish I had...."

bob-c
Posts: 16
Joined: Tue Aug 26, 2014 12:49 pm
Location: Victoria,BC
Motorcycle: 2007 GL 1800

Re: Rubber burning

Postby bob-c » Thu Feb 26, 2015 12:44 am

I had 2 Avon rear tires fail when almost new. The scarf joint of the very center external layer of the tread, failed on both tires. A screwdriver could be easily slipped into the joint about 1/2 inch. If this was the case with your 3/16 clearance, you would have the slapping noise. Have a real close look at the center of the tread.
Incidentally, Avon refunded the price of both tires.




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