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[Ridgerunr]

I have 2 HD's with Dunlop 19" fronts and 16" rears. A 2014 CVO RK and a 2015 Road Glide Special, so different rims. Both bikes, front and rear tires lose 4-6 psi every 3 weeks. I soap'd both looking for a rim leak and valve stem leak, no bubbles I can see. Can't believe all 4 rims have a leak, but then again anything can happen. I chalk it up to the tires and would suggest folks monitor tire pressure often. Reading about  complaints of Dunlops cupping, this may be the issue.

[Quantumracer]

Great info.  Thanks! 

 

[Billy]

I check my tires every couple weeks. They hold pressure mostfor about 6 weeks then they may be down a # or  2 . . It seems like when the weather changes they change to. I have cupping too So I make sure they are good. We drive 15,000 miles a year. Billy

[Ridgerunr]

When I lived in Mich., and ran Avons they would maintain pressure almost the whole winter. The Michelin Comm ll's I had were also good. I never was a fan of Dunlops but I have to say these handle very well, wet and dry conditions. 

[mark]

My Dunlops (past and present) lose 1-2 lbs every 2 weeks. 

[greglyon]

Has anybody noticed any difference in pressure drop when tires are filled with nitrogen?

[hdaliaconis]

I think it the nature of the beast.  I have to check and add some air about every three weeks.  Regardless it's good add tire pressure to your pre-ride routine, along with lights, oil, controls, etc.  Having started on a 1950 panhead, I can't not check oil! 

[grc]

Has anybody noticed any difference in pressure drop when tires are filled with nitrogen?

No, at least not on a four wheeled vehicle.  Never tried it on a bike (and I consider it snake oil btw), but the place I bought a new set of tires for my SUV inflates all their tires with nitrogen.  The pressure still varies with temperature, just like the universal gas laws would predict, and even at the same temperature I've had to add some air after a couple weeks.

Jerry

[hdaliaconis]

Think about it!  The air is 78% nitrogen.  You are automatically inflating you tires with nitrogen.  Just a gimmick to get you back and look for some other issue to sell you on.  JMO

No, at least not on a four wheeled vehicle.  Never tried it on a bike (and I consider it snake oil btw), but the place I bought a new set of tires for my SUV inflates all their tires with nitrogen.  The pressure still varies with temperature, just like the universal gas laws would predict, and even at the same temperature I've had to add some air after a couple weeks.

Jerry

[Quantumracer]

Think about it!  The air is 78% nitrogen.  You are automatically inflating you tires with nitrogen.  Just a gimmick to get you back and look for some other issue to sell you on.  JMO

Nitrogen works...plain and simple.  The 22% oxygen molecules in air are responsible for pressure loss over time.  My Jeep Wrangler tires are filled with air.  They lose about three psi every two weeks.  My wife's grand Cherokee tires are filled with nitrogen....we've had it since March, and not one lb of pressure loss. 

Air molecules are smaller than nitrogen molecules and can escape through rubber...nitrogen cannot. 

Dan
 

[grc]

Nitrogen works...plain and simple.  The 22% oxygen molecules in air are responsible for pressure loss over time.  My Jeep Wrangler tires are filled with air.  They lose about three psi every two weeks.  My wife's grand Cherokee tires are filled with nitrogen....we've had it since March, and not one lb of pressure loss. 

Air molecules are smaller than nitrogen molecules and can escape through rubber...nitrogen cannot. 

Dan
 

Highly unlikely, and your claimed results aren't supported by independent tests performed by folks like Consumers Report.  And my own results, mentioned above, also refute your claim.  But let's not turn this guy's thread into another argument full of BS about nitrogen.

Jerry

[Quantumracer]

Highly unlikely, and your claimed results aren't supported by independent tests performed by folks like Consumers Report.  And my own results, mentioned above, also refute your claim.  But let's not turn this guy's thread into another argument full of BS about nitrogen.

Jerry

Interesting story, but science doesn't lie.  It is possible that the difference in compounds between bike tires and suv tires is the key to his loss, but I 100% stand by my personal experience with nitrogen in my wife's vehicle tires.

 

[Ridgerunr]

Has anybody noticed any difference in pressure drop when tires are filled with nitrogen?

No. One of the bikes mentioned in the opening post is a 2015, nitrogen by the dealer. 

[ultrarider123]

My Dunlops (past and present) lose 1-2 lbs every 2 weeks.

I won't dispute anyone's issues here as we all have different experiences.  I ride my bikes all year round and except for the extreme temp. changes, have not had any issues running regular old air in my Dunlop tires.  I check the pressure regularly and seldom have to add any air.
As for car tires, plain old air in all three.  Two sit inside, one outside.  Air pressure is steady in all of them with variations only when the seasons change.  The MINI doesn't get driven often anymore but the Conti runflats keep a steady pressure...regular air in them, too.

[greglyon]

When I had 2 bikes sitting side by side in the garage a 2003 flhrsei2 with good ole air in the tires.  Next to it a 2009 fltrse3 with nitrogen in both tires. I rarely had to add air to the nitrogen filled tires.   The pressure loss reported by others was similar to my experience on the bike tires filled with air.  Just sayin