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back tire air pressure

Laila's Dad

Laila's Dad

New member
Hello all,

I hope things are going well as you walk or ride into 2013. I posted not to long ago about finding the tire stem on the back tire to be in a hard to reach spot. Well when I can reach the stem to check the pressure it is normally below the recommended PSI. Is it normal to have to put air in the back tire often? The front tires keep the PSI really well. Oh I am a big guy...but not close to the 440lb RS weight limit :)
 
In a word ,Yes. Most tires for motorcycle use tend to lose some air in a relatively short time ,
Where as car tires don't.

Just to add the awkward location of the valve, Some times will cause some air loss while checking.
 
Last edited:
Laila's Dad said:
Hello all,

I hope things are going well as you walk or ride into 2013. I posted not to long ago about finding the tire stem on the back tire to be in a hard to reach spot. Well when I can reach the stem to check the pressure it is normally below the recommended PSI. Is it normal to have to put air in the back tire often? The front tires keep the PSI really well. Oh I am a big guy...but not close to the 440lb RS weight limit :)
Click to expand...




Have you tried nitrogen in your tires, we have in all 3 and haven't had any issues. Nitrogen doesn't expand as much in hot weather & doesn't shrink in cold weather as bad as air. Our dealer has offered to put it in for free, might try your dealer.
 
Actually, all our Spyders have held air well...far better than the motorcycles. This is probably due to the larger tire volume.

If you are losing a few pounds every week or two, and the storage temperature is not fluctuating drastically (or you lose air even when the temperature rises), something may be wrong. The back tire should change pressure any more rapidly than the fronts. The first thing to do is check for leaks at the valve core.
 
NancysToy said:
Actually, all our Spyders have held air well...far better than the motorcycles. This is probably due to the larger tire volume.

If you are losing a few pounds every week or two, and the storage temperature is not fluctuating drastically (or you lose air even when the temperature rises), something may be wrong. The back tire should change pressure any more rapidly than the fronts. The first thing to do is check for leaks at the valve core.
Click to expand...

well i guess i will have to monitor the tires longer. i got the spyder in October and although I am in Tejas the temperture has steadily gotten lower each month(in the 40's now).Plus I didn't get my M endorsement right away so i didnt start putting real miles on the spyder til recently. I am getting close to the 600 mile check up so I will have the dealer take a look then.
 
ringalls51 said:
Have you tried nitrogen in your tires, we have in all 3 and haven't had any issues. Nitrogen doesn't expand as much in hot weather & doesn't shrink in cold weather as bad as air. Our dealer has offered to put it in for free, might try your dealer.
Click to expand...

is the dealer the only place to get the Nitrogen? is it easily obtained?
 
Nitrogen....

Guys/Gals,

Putting nitrogen in your tires is a farce. Air contains 78% nitrogen already and about 21% oxygen. You would have to be able to completely empty all the air out of your tires and add pure nitrogen in. This would take two valves on your wheel to do. If you tried to vacuum the air out of your tires they would pop off the rim before you could get sufficient air out to make a difference. This was a ploy by the car companies to get more of your money when you purchased a car. Don't fall for this. Now garages are offering this but I have never seen any real proof that adding nitrogen helps any.

Laila's Dad, you may have a leak around the rim or there is a leak from your valve. Fix that and you won't be leaking any air out.

Brian
 
Laila's Dad said:
is the dealer the only place to get the Nitrogen? is it easily obtained?
Click to expand...

Hi there Some car tires delars here in New Zealand have Nitrogen run's cool keeps tires same psi and tires last longer to , there words

I don't run it but my psi is 29 in the rear and in the front it is 19 psi :yes:
 
bscrive said:
Guys/Gals,

Putting nitrogen in your tires is a farce. Air contains 78% nitrogen already and about 21% oxygen. You would have to be able to completely empty all the air out of your tires and add pure nitrogen in. This would take two valves on your wheel to do. If you tried to vacuum the air out of your tires they would pop off the rim before you could get sufficient air out to make a difference. This was a ploy by the car companies to get more of your money when you purchased a car. Don't fall for this. Now garages are offering this but I have never seen any real proof that adding nitrogen helps any.

Laila's Dad, you may have a leak around the rim or there is a leak from your valve. Fix that and you won't be leaking any air out.

Brian
Click to expand...

I dunno about that. I'm not an expert, but most of the teams in the race series I'm the starter for run nitrogen in their tires to keep the pressure more stable. The teams swear by it.
 
flaggerphil said:
I dunno about that. I'm not an expert, but most of the teams in the race series I'm the starter for run nitrogen in their tires to keep the pressure more stable. The teams swear by it.
Click to expand...
In a racing tire, where 1/4 pound can make a difference, it can be somewhat helpful to run nitrogen. Remember that races only last a short while, and the only variation they are chasing is due to tire heating, rather than a wide range of climatic changes. Using 100% nitrogen makes things a bit more predictable...and nitrogen from tanks is dry, to add another constant. For street driving the use of 100% nitrogen is of minimal value, there are too many other variables. It is strictly a money maker, and any benefits are more perceived than actually realized.
 
If you keep using the CHEAP nitrogen (The stuff that's got oxygen mixed in with it...), you'll always be fine as long as you keep a good watch on the pressures! :thumbup:
The rear tire can be pretty fussy about the actual air pressures... If you find the "sweet spot" where your tire is giving nice even wear across the tread; paint it on the garage wall and never vary from it! :shocked: nojoke
 
NancysToy said:
In a racing tire, where 1/4 pound can make a difference, it can be somewhat helpful to run nitrogen. Remember that races only last a short while, and the only variation they are chasing is due to tire heating, rather than a wide range of climatic changes. Using 100% nitrogen makes things a bit more predictable...and nitrogen from tanks is dry, to add another constant. For street driving the use of 100% nitrogen is of minimal value, there are too many other variables. It is strictly a money maker, and any benefits are more perceived than actually realized.
Click to expand...
:agree:
:agree::agree:
:agree:
 
I go 17 and 27...many have found that too much more pressure will lead to uneven tire wear (too little tread on the ground). There have been many talks about this over the last several years...you want more tire on the road for more traction, unless you're in the snow...more pressure is like a high heel vs. a sneaker...yeah, more psi, literally, but more wear to the center of the tire...and this is not the way the tire was built...only good if in snow...and most of us are not riding in snow all that much.

Everything within reason...BRP recommendations seem very low but they know what they are doing. I feel like my bike handles well and is comfortable at 17 and 27.
 
GeoffCee said:
"Nitrous" is nitrous oxide or laughing gas, you could inflate your tires with it if you wanted to laugh at getting a puncture.
Click to expand...

Well i guess Nitrous could be right, The thought of of using Nitrogen in non racing tires does make me,
Want to Laugh.:roflblack:
 
If you're putting Nitrous in your tires, you're doing it wrong. NOS goes in your intakes for the fastest drag race times. ;)
 
Laila's Dad said:
Hello all,

I hope things are going well as you walk or ride into 2013. I posted not to long ago about finding the tire stem on the back tire to be in a hard to reach spot. Well when I can reach the stem to check the pressure it is normally below the recommended PSI. Is it normal to have to put air in the back tire often? The front tires keep the PSI really well. Oh I am a big guy...but not close to the 440lb RS weight limit :)
Click to expand...
No body has talked about the fact that a tubess tire has to seat in to the bead of the rim I've had new tires mounted that I didn't put on right away and after a few months they were low on air some more than others put them on and start using them and they hold air fine tires need to heat up and soften to seat into the wheel so they need to get used and have a few longer trips to seat
 
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