Interstate Travel

[FJ_Hooligan]

Aggressive riding thru twisties will cause loss of tire psi .

I don't think this is true.  Aggressive riding will cause the tire to heat up and actually build up more pressure.  That's why "track day" tire pressures are significantly lower than "street" tire pressures.  The tire will run much hotter being abused on a track and build up pressure.

One other thing, an underinflated tire will run hotter than a properly inflated tire due to excessive squirming of the rubber.

[Country Joe]

Sounds like an old wives tale ...  JMHO

More like an old man's tale ... ha ha

Depends on how clean your rim is and what was used to mount tire, followed by what kind of break in miles you put on the tires.

Aggressive riding thru twisties will cause loss of tire psi .

Just talking about 2-5 psi at the end of the run.

It looks like I need to step up the pace in the twisties, I haven't been able to have that happen yet

[FJmonkey]

Lets stick to the question. Tire pressure is important, but this guy wants use his FJ to cover miles... What else you got?

[FJ_Hooligan]

I'm sorry Mark, but you can't put inaccurate information out there and not be called on it no matter what the original topic.

And if you want to cover a lot of miles, you better have the correct air pressure in your tires so it is related to the original post.

[Country Joe]

Lets stick to the question. Tire pressure is important, but this guy wants use his FJ to cover miles... What else you got?

What does the tire pressure sticker under the seat say? That's probably a good place to start.

[FJmonkey]

I'm sorry Mark, but you can't put inaccurate information out there and not be called on it no matter what the original topic.

And if you want to cover a lot of miles, you better have the correct air pressure in your tires so it is related to the original post.

Fair enough, I prefer to check my pressure each day before I ride. I try to keep it simple. However, in support of your concern, I have been on plenty of twisty rides. The only ride that left me with a low pressure tire was a failed valve stem. I guess if it was really important I could install a tire pressure monitoring system.

http://stuccu.com/s/Motorcycle+Tire+Pressure+Monitor-MbSLsTI-Buy-Exclusive-Deals-70-OFF-Save-Big-Lowest-Price-On-Motorcycle-Tire-Pressure-Monitor-Best-In-Stock-Fast-Free-Shipping?keyword=motorcycle%20tire%20pressure%20monitor&matchtype=b&querystring=tire%20pressure%20monitoring%20motorcycle&netid=2&aaid=546347aab1b1c61e78641be4&oid=29079900922&caid=546347aab1b1c61e78641be1&device=c

[Mark Olson]

I'm sorry Mark, but you can't put inaccurate information out there and not be called on it no matter what the original topic.

And if you want to cover a lot of miles, you better have the correct air pressure in your tires so it is related to the original post.

I'm sorry Mark, but you can't put inaccurate information out there and not be called on it no matter what the original topic.

And if you want to cover a lot of miles, you better have the correct air pressure in your tires so it is related to the original post.

Hey Hooligan,,, This is not inaccurate information ...I will stipulate that "you may/can lose tire psi after riding extreme twisties"

We all check tire psi before riding our FJ's , Am I the only one who has had a loss of tire psi ?

So every motorcycle I ever rode has a bad stem or bad wheel/tire seal problem for the last 40 yrs?
My riding buddies must have the same problem too I guess.

I am very much aware how tires heat up and change psi and will make adj as needed . I would welcome you to come ride with me and see if you lose air. 

The moral of the post is check your tire psi more often on an interstate ride. 

[FJ_Hooligan]

Riding hard causes the tire to heat up.  Raising the temperature of an (essentially) fixed volume of gas (the inside of the tire) will cause the pressure to go up.  That's simple high school physics.

Please explain how you have altered the law's of physics?

In the past I have monitored tire pressure during a ride.  In a bind I had to replace a rear tire with a bias ply tire.  I was originally terrified of the consequences of that action.  I was mostly concerned about what pressure to run and it's affect on traction.  I set the pressure to the same as I had been running in the radial; 42psi cold.  After riding to a local twisty road and making a fairly spirited ride down it the pressure had increased to 45psi.  I checked the pressure several other times during that ride and it was never below the 42 psi cold starting pressure.   As an aside, the tire worn fine and lasted a long time.

I also have first hand experience with Sprint car racing where one of our biggest concerns was the tire heating up during the race and throwing the handling off.  When you start with only about 8psi in the rear tire, a rise of even 1/2psi is significant.  So much so that one of the tasks between races was to set and test the tire bleeders.  These are check valves that install in the rim that release excess pressure that always builds up during the race.  Also, the tire pressure monitoring systems on my car and truck never shows the pressure decreasing below the cold starting pressure.

The only time I came back from a ride with less pressure in my tire was because of a nail.

[FJ_Hooligan]

However, in support of your concern, I have been on plenty of twisty rides. The only ride that left me with a low pressure tire was a failed valve stem.

So, what side of this argument do you think I'm on?

[pdxfj]

Alright gents.. this discussion has become way OT..

Start another thread, take it to PM, etc..

Let's get back on track to help the OP on his ride from sunny S. California to grey and wet Seattle Washington.

[FJ1100mjk]

I would welcome you [FJ Hooligan] to come ride with me and see if you lose air.  

Wahoo! The gauntlet has been thrown down!

We've got ourselves a bonafide duel in the making! 

[FJ_Hooligan]

Mark Olson,
I apologize for the tone of my response.  If I was a doctor, my bedside manner would suck.  I do not mean for my response to sound adversarial.  In reading it, it sounds that way.  I was merely attempting to apply science and personal experience to explain the situation.  I realize you may have had a differing experience.  Sometimes I can be a bit of a dick.  I will try to not be so overbearing in the future.

Now, all the new "Topic Police" can return to their regular jobs.  (oops, I think I just did it again)

[Mark Olson]

Mark Olson,
I apologize for the tone of my response.  If I was a doctor, my bedside manner would suck.  I do not mean for my response to sound adversarial.  In reading it, it sounds that way.  I was merely attempting to apply science and personal experience to explain the situation.  I realize you may have had a differing experience.  Sometimes I can be a bit of a dick.  I will try to not be so overbearing in the future.

Now, all the new "Topic Police" can return to their regular jobs.  (oops, I think I just did it again)

No problem Hooligan , It appears we have had different experiences with tire psi. Not the first time I have bent the laws of physics.

 

[FJmonkey]

Not the first time I have bent the laws of physics.

Mark, you are the bent laws of physics.... 

Edit: How else can you be such an argumentative dick head and still be so likeable?

When is the next Renegade rally?

[ribbert]

Now, all the new "Topic Police" can return to their regular........

An innocuous discussion conducted in a light hearted and good natured manner and two "Post Police" in two days come down on it.

Considering some of the rubbish that gets posted unchallenged I find this odd, if not disappointing.
Does one need permission to post on this subject now or do I just run the gauntlet, throw caution to the wind, put 'em on the line and post anyway.

I was enjoying that discussion.

This is a nasty precedent that I hope doesn't gather momentum. The only time I have experienced this before is when one of the contributing parties suddenly realises they about to be proved wrong and declares the subject closed.

I hope this is a one off and not a trend.

Or, it could just be me and maybe no one else found it offensive, in which case, declare the topic closed.

Noel