Tires losing 4 PSI per day is normal?

brentseay@gmail.com · Oct 11, 2019

Team,

My 2010 RT with Road 5 tires lose about 1 PSI per day on the front wheel and 4 PSI on the back wheel per day. I check my tires every day but wasn't expecting to have to inflate them every day. These are new tires and have no visible punctures. I'm told by other motorcycle friends and one motorcycle mechanic that "sport tires" will lose air very quickly.

What gives?

Thanks,
Brent

mikegalbicka · Oct 11, 2019

Not normal in my world with any tire.

179212 · Oct 11, 2019

Tires

Valve Stem?

lee · Oct 11, 2019

It's not normal.
Maybe leaking at the valve cores or tire beads.

36654 · Oct 11, 2019

179212 said:
Valve Stem?

That would be my choice.......

Omega Man · Oct 11, 2019

Checking your tires every day is/will be tough on the cores in the valve stems. I like a “trigger-sprayer” with a mix of water and dishwashing soap to test with. Watch for “foaming” or a slow lazy bubble.
OM

98lee · Oct 11, 2019

Brent,

Start by removing the valve stem caps and spraying the stems with Windex. Bubbles coming out end = loose or bad valve core. Bubbles coming out around base = bad stem.

If no bubbles from stem, try spraying around the bead (where the tire meets the rim). If you have bubbles there, someone didn't clean the rim adaquately when the tire was mounted.
Or
Some tires have mold "whiskers" that are very close to the bead that under some circumstances, during mounting, can be stretched between the bead and the rim, causing a leak.

Edit: Damn, I get a phone call in the middle of answering you and four people respond!

:dance

pglaves · Oct 11, 2019

brentseay@gmail.com said:
I'm told by other motorcycle friends and one motorcycle mechanic that "sport tires" will lose air very quickly.

Brent

They are wrong. Modern tires of any variety do not lose air very quickly if the valve stem and core are sound and the rim is clean when the tire is mounted.

I find that with PR4 tires on an R1100RS and R1150R I might need to add a pound or two every month.

brownie0486 · Oct 11, 2019

Had a valve stem not fully tightened that was discovered to be the culprit of 2-3#'s a day. I'd start there as others have suggested/.

terek · Oct 26, 2019

Try mixing 25/75 concentrated soap to water.

I had similar PSI lose a week ago, 11 PSI a day. The air lose turn out to be a small wire that punctured the inner edge of the tire groves. There were no tiny bubbles, but a single very slow expanding bubble (1mm every 2 sec).

PoorUB · Oct 26, 2019

The OEM Michelins that were on my RT were tight, I rarely added air. The tires on my Yamaha R1 lose maybe 1 pound every two weeks.

A pound a day? Nope, not buying that.

On the other hand, how careful are you when you check the air pressure. Pretty easy to dump a pound.

saddleman · Oct 26, 2019

I would hope not I very seldom check air pressure & I ride 5 to 7 days a week. I might check my air pressure every other month.

bigjohn72 · Oct 26, 2019

Worse case scenario - but check to make sure your rims are not cracked anywhere. can do it with the soapy water / windex spray as suggested for the valve stem

not to mention that if the bead area on the rim had not been cleaned, it can cause some leaking as well, again mentioned above by checking the bead for bubbles

dieselyoda · Oct 26, 2019

The OP never responded. This was another "how far can I go on bald tires?"

The forum moderators have to start taking action on these absolutely, ridiculous posts.

jandhumphreyme · Oct 27, 2019

dieselyoda said:
The OP never responded. This was another "how far can I go on bald tires?"

The forum moderators have to start taking action on these absolutely, ridiculous posts.

What actions do you recommend the moderators take?

You respond to a two week old post with thirteen response's that are pretty much identical and are upset that someone doesn't respond?

I hope I'm missing a joke here, new meds have me a little off kilter.

BC1100S · Oct 27, 2019

dieselyoda said:
The OP never responded. This was another "how far can I go on bald tires?"

The forum moderators have to start taking action on these absolutely, ridiculous posts.

"Lighten up, Francis."

AKsuited · Oct 27, 2019

Lee said:
It's not normal.
Maybe leaking at the valve cores or tire beads.

Or a puncture. I've had my share of those...

BC1100S · Oct 27, 2019

AKsuited said:
Or a puncture. I've had my share of those...

My money's on this.

05biggray · Oct 27, 2019

Air loss

brentseay@gmail.com said:
Team,

My 2010 RT with Road 5 tires lose about 1 PSI per day on the front wheel and 4 PSI on the back wheel per day. I check my tires every day but wasn't expecting to have to inflate them every day. These are new tires and have no visible punctures. I'm told by other motorcycle friends and one motorcycle mechanic that "sport tires" will lose air very quickly.

What gives?

Thanks,
Brent

Just returned 3K trip lost 2psi front 3psi rear Michelin road pilot 5 in the first 1300 miles.
Lost none on the return . Tires were new when I, started the return trip was mostly in the rain.
Perhaps the tires stayed cooler.

pglaves · Oct 27, 2019

05biggray said:
Just returned 3K trip lost 2psi front 3psi rear Michelin road pilot 5 in the first 1300 miles.
Lost none on the return . Tires were new when I, started the return trip was mostly in the rain.
Perhaps the tires stayed cooler.

This tells me that the rims were not totally clean, but that the seal improved as the tires flexed as the bike was ridden those first many miles.

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