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Sportster Motorcycle Tires, Wheels, and Brakes Discuss issues with Sportster motorcycle tires, wheels and brakes.

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View Poll Results: How do you adjust your tire pressures?
Use Manufacturers recommendations 28 58.33%
Go by the Max. air pressure on the tire 5 10.42%
Adjust pressure to my style of riding 15 31.25%
Only add air when tires look or feel low 0 0%
Voters: 48. You may not vote on this poll

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  #21  
Old 26th July 2019
SLW210 SLW210 is offline
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My front wears faster than the rear, last tire change still a good deal of tread on the back, front was bald and evenly worn for the most part, considering no real twisties down here.

Which of coarse goes to the subject at hand, tire pressure needs to be adjusted to the individual and his bike.
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  #22  
Old 27th July 2019
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I voted max, but actually a PSI or two under max. The Metzler tech rep explained that tire temp increases dramatically with lower pressure, and just 5 PSI can make a big difference.
I run Metzler 888’s.
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  #23  
Old 27th July 2019
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The factory recommendations on tire pressure take into consideration the weight of the vehicle, rider, passenger, and any loads strapped on the bike. They try and set the pressures for maximum traction and braking. Over pressure usually leads to less traction and stopping power. My "Voice of Experience"... I don't think heat is a factor unless the tire is poorly/cheaply made.
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  #24  
Old 27th July 2019
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Quote:
Originally Posted by Toejam503 View Post
My "Voice of Experience"... I don't think heat is a factor unless the tire is poorly/cheaply made.
I think a lot of people thought that way, until Ford Explorers started rolling over after blowouts.... And now we have government mandated TPM Systems.
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  #25  
Old 29th July 2019
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Under pressure on a motorcycle tire results in a smaller patch while in a turn. Once the pressure gets low your contact patch goes from ( ) to ()() when in a turn you are on the smaller contact area. Under pressure also results in too hot a tire and more side wall flex. Over pressure results in a smaller contact patch and cooler tire temps (not necessarily a good thing). Plenty on this on YouTube with great demonstrations. I'm not going to get into all of that here.

I would try to explain the pretty much foolproof way to get your tire pressures as good as possible, but there are fools on here that can't be proofed.
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  #26  
Old 29th July 2019
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Quote:
Originally Posted by SLW210 View Post
Which of coarse goes to the subject at hand, tire pressure needs to be adjusted to the individual and his bike.
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  #27  
Old 30th July 2019
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~30 front ~40 rear (two-up riding)

Last edited by hammer6315; 31st July 2019 at 00:58..
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  #28  
Old 30th July 2019
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Quote:
Originally Posted by Bone View Post
I think a lot of people thought that way, until Ford Explorers started rolling over after blowouts.... And now we have government mandated TPM Systems.
Maybe, I should have added that if the tire pressures are run too far under Manufacturers recommendations there will be problems, too. FWIW..Most of the Explorer rollovers were due to having very low tire pressures. After Ford got sued, they shifted the blame to Firestone. Firestone researched it and with the Gov findings concluded that the real culprit was the fact that all the Service stations had gone to Self-Service and the majority of people weren't checking their tire pressures. Thus the Gov. mandated TPM Systems. "If the public isn't going to protect themselves, the Gov. will do it for us." There's all kinds of info on this subject on the internet.
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  #29  
Old 30th July 2019
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im new to harleys. 2 experienced riders told me,
if it was under 35 dont ride it.
so i set them both to 35. seemed ok????
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  #30  
Old 31st July 2019
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30 psi front and 40 psi rear on standard type Dunlop.

My garage floor let me know when to check the tire pressure: When the pressure is low my tires squeak when I maneuver.
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