Tire Pressure
Road Master
Joined: Sep 2015
Posts: 1,020
Likes: 130
From: Vancouver
I wouldn't bet your son or daughter on this. I've been to many track days, manufacturer numbers are also off. It's not one pressure solves all. Pirelli spokesperson told a bunch or riders to run 36PSI one year on one of their tires. After experimenting on a few combinations, they were totally off. Just because it comes from the manufacturer, I wouldn't hold it to that too much. They don't know your riding style, the bike it's on, and also what you want out of a tire.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,173
From: Oxford, Nc
I wouldn't bet your son or daughter on this. I've been to many track days, manufacturer numbers are also off. It's not one pressure solves all. Pirelli spokesperson told a bunch or riders to run 36PSI one year on one of their tires. After experimenting on a few combinations, they were totally off. Just because it comes from the manufacturer, I wouldn't hold it to that too much. They don't know your riding style, the bike it's on, and also what you want out of a tire.
Part of my questions came from remembering that when the 880 came out, Metzeler recommended exceeding the posted tire pressures (They even had a tire pressure website for a time.) Since the sidewalls are considerably stiffer on the 888, that practice is no longer recommended.
Road Master
Joined: Sep 2015
Posts: 1,020
Likes: 130
From: Vancouver
Your sporty is lighter than your dyna. That makes a difference. More load , faster wear.
Road Master
Joined: Sep 2015
Posts: 1,020
Likes: 130
From: Vancouver
Same science. Let it be cars, cruiser bikes, race bikes etc. The physics are the same when it comes to tire pressure. It's an art to get it to optimal performance. Let anyone tell you one specific pressure is the best is not true.
Supporter
Joined: Jan 2007
Posts: 15,788
Likes: 5,621
From: along the shore of Mishigami
I've got 13,000 miles on the tire on the back of my FXD, using 37-38 psi. Please keep in mind most Harleys running gear is designed for a nominal 180 lbs. person. Make minor adjustments accordingly.
Outstanding HDF Member
Joined: Sep 2014
Posts: 2,717
Likes: 273
From: Minnesota
09 fdx,, I'm running Pirelli Night Dragons front and rear. I run the Front at 28-30psi Rear is 35-36. Both tires have the recommended dose of Ride-On to maintain fluid/stasis balance.
I always check and adjust when the tires are cold and keep an eye on seasonal ambient temp changes.
I'm not the least bit concerned about tire mileage longevity,, I want Grip.
p.s. Get a decent pressure gauge that has a proper range for the bike, there is no need to have a gauge that reads from 0 to 120psi.
I always check and adjust when the tires are cold and keep an eye on seasonal ambient temp changes.
I'm not the least bit concerned about tire mileage longevity,, I want Grip.
p.s. Get a decent pressure gauge that has a proper range for the bike, there is no need to have a gauge that reads from 0 to 120psi.
Last edited by JohnMn; Apr 7, 2016 at 01:08 AM.
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