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SoCal tubeless noob

Old 10-03-18, 08:27 PM
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pbass
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SoCal tubeless noob

Just had my new gravel bike set up tubeless by my LBS I bought it from. First time tubeless in about 10 years of riding various rigs. Late to the party. My question is, I live in SoCal--typically hot and dry. What's the best way to check if I've got enough sealant in there? Or, do you just add some periodically? Using Stan's, fwiw.
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Old 10-04-18, 01:58 PM
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Shake wheel, when it stops sloshing, add a couple of ounces.
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Old 10-04-18, 02:30 PM
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During the summer months, you might find yourself refreshing the sealant every 3-4 weeks. Later in the year when it cools off, I can generally go from November through to February on a 2oz fill.

Best way to check? Rotate the valve to the 6 o'clock position, remove the core, and stick the foreign object of your choice down the stem-- a 4" zip tie works pretty well. If it comes back dry, or if the fluid is colorless, time to add more sealant.
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Old 10-04-18, 04:51 PM
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Thanks guys! You know how it is down here Dr--mostly hot and dry. Nice to hear you get through the "winter" here w/o having to replenish it much.
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Old 10-07-18, 06:05 AM
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[quote=
best way to check? Rotate the valve to the 6 o'clock position, remove the core, and stick the foreign object of your choice down the stem-- a 4" zip tie works pretty well. If it comes back dry, or if the fluid is colorless, time to add more sealant.[/quote]

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Old 10-07-18, 10:21 AM
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Been researching this but since I've got this thread going here I'll ask you folks - been on about 4 rides since the LBS set this up tubeless--on and off road. I seem to lose a few psi each ride, maybe 3-5psi, and I'm losing about 10psi overnight, a little more on the rear wheel than the front. Of course there's sealant in there as they just set it up a week ago, but perhaps I should add a little?

Last edited by pbass; 10-07-18 at 10:39 AM.
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Old 10-07-18, 10:39 AM
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You probably have plenty of sealant. Pressure loss varies wildly-- I've had tires not drop a single pound over 2-3 days, I've had them lose 10 pounds overnight. Now if you get up in the morning and it's dead flat, you need more sealant. My thinking is that it's all of the little micro-punctures we don't notice with tubeless-- they would be outright flat tires on tubes, but for us it's just a little bit of pressure loss. Also, get used to checking your valve cores-- if you don't have a remover tool, get one. It's very common for them to get sorta plugged with a bit of sealant, and then slow leak.

Half of my "flats" this year have been from not checking the sealant often enough, and getting a puncture in a dry tire... so, my own fault. I just put up a chalkboard near the bike stand so I write down the dates I last checked. Now if I can just remember to use the board.
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Old 10-07-18, 11:13 AM
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Originally Posted by DrIsotope View Post
Also, get used to checking your valve cores-- if you don't have a remover tool, get one. It's very common for them to get sorta plugged with a bit of sealant, and then slow leak.
Thanks for the info. I did get a valve core tool, the little red Stan's one. So, you deflate the tire, remove the valve core and check if it is plugged? Seems counter-intuitive to me that it being plugged would result in a leak - shows ya what I know!
One thing I don't have yet but is next on my list is a compressor--right now I'm just using my floor pump.

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Old 10-07-18, 12:17 PM
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Yeah, the problem is that the sealant almost plugs the core-- so the core itself can't seal and a tiny bit of air trickles out. I've only had sealant actually plug the stem once, and as soon as I pulled the core, the little plug shot out.

I've said before, I can't fault sealant for doing it's job too well.
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Old 10-07-18, 12:29 PM
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Originally Posted by DrIsotope View Post
Yeah, the problem is that the sealant almost plugs the core-- so the core itself can't seal and a tiny bit of air trickles out. I've only had sealant actually plug the stem once, and as soon as I pulled the core, the little plug shot out.

I've said before, I can't fault sealant for doing it's job too well.
Awesome--thanks again for the tips! As I google it does seem like there's lots of variation on how tubeless behaves--some never losing pressure after initial setup, some taking multiple rides to "settle" in. I've only had these set up a week so I guess I should just ride the darn thing and stop worrying about it and see how it changes.
EDIT: well, took 'er out for a 2 hour ride with plenty of "underbiking" today, and upon finishing I had lost no pressure in the front tire and only one pound in the rear. Not bad!

Last edited by pbass; 10-07-18 at 05:10 PM.
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Old 10-08-18, 10:23 AM
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I agree with DOS. Best way to check sealant level.
I also make sure to spin my wheels every few days so the sealant doesn't settle in one area if I am not using that bike.
I had a case where I left the wheel stationary for a while, and the sealant settled making the wheel unbalance to the point where I had to remove the tire, clean everything up, and start over with fresh sealant.
I have found that some sealant settle more than others.
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Old 10-09-18, 05:04 PM
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Originally Posted by DrIsotope View Post
Now if you get up in the morning and it's dead flat, you need more sealant.
This is my indicator for more sealant. Except it's more like, if it's dead flat, I pump it up, go for a ride, and the next day it's dead flat again.
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