[chainringX2]

Just got my new Stans Crests wheels and mounted Schwalbe tubeless ready Racing Ralphs on them. Easy install and aired right up. Next day more or less flat. Not flat like a pancake, but all but no psi in them. Aired them up again and spun the tires for a few minutes thinking the sealant needed to just get into every little nook and cranny. Same result. Aired up a few more times. Same result. Then finally had a chanct to go out and ride for about an hour on them. No problem while riding, but next morning.... same result.

Any ideas? Departing for Old Pueblo tomorrow and really don't want to have to be airing them up after every lap...

All of my past tubeless experience has been with Crossmax UST wheels and UST tires which I've never had any issues with.

 

[92gli]

Make sure the valve is tight.

Did you check the tape for lifting ? It might not have been stretched tight enough.

Air up the tires to the max pressure to make sure the beads seated all the way.I go beyond max pressure but that worries some people so (disclaimer) don't do it

If you used levers to put on the tires you may have punctured the tape.

 

[PissedOffCil]

Some tires need to be ridden a fair amount before they really seal up. Nevegals are an example that come to mind. Not sure about the RaRas.

You never had a problem with UST setups because they don't require sealant, the tire has a butyl layer.

I doubt you'll lose air when riding.

 

[dwt]

+1 on check the valve. IME, rapid air loss after the bead has seated in through a valve which is not airtight. Air up and immerse the wheel in a tub of water to verify where the leak is. If it is the valve, try a dab of silicone caulk underneath the valve, then retighten the valve with an extra turn or two with pliers. Once the leak is sealed and the tire holds air, back off the valve torque so it is finger tight only.

 

[b-kul]

did you really stretch out the tape then air it up with a tube and let it sit around a hour to really set the tape good?

 

[chainringX2]

did you really stretch out the tape then air it up with a tube and let it sit around a hour to really set the tape good?

got them direct from Stans, so I assume they did that....

 

[b-kul]

got them direct from Stans, so I assume they did that....

ahhhh. then i guess they did. did you try to seat your tires with soppy water? id give that a shot.

 

[bquinn]

You might want to take the wheel off the bike and lay it on the ground flat letting the sealant sit on the sidewall, that is typically where you will loose air on non UST tires. Might even have to add more sealant.

I have RaRa Double Defense on some Flow's and they sealed up great with Slime Pro system. They do loose a slight amount of air over time, but we're talking a week or more.

 

[thrasher_s]

I just mounted some Specialized 2Bliss ready (non-ust) tires on flow rims that I taped myself. First air up lost air overnight, had just enough air to hold shape. I aired them up, and they did just fine on an 18 mile ride, FWIW.

I did two things to solve the issue, not sure which solved it.
1) tighten valve stems beyond finger tight.
2) I took a dab of sealant and rubbed it all around the beads of the tires.

When I aired it up again both tires made noticeably louder popping/pinging noises from the bead popping into the rim. 24 hours later the rear rim is holding max PSI and the front is down about 8 PSI from max. It might be a pain to get the tires off the rim now, but I would rather cross that bridge later and not have to worry about them for several hundred miles. Never had a flat Stans, except a major sidewall failure on a really old tire.

 

[dirtyjack]

You might want to take the wheel off the bike and lay it on the ground flat letting the sealant sit on the sidewall, that is typically where you will loose air on non UST tires. Might even have to add more sealant.

I have RaRa Double Defense on some Flow's and they sealed up great with Slime Pro system. They do loose a slight amount of air over time, but we're talking a week or more.

This. RR's sidewalls leak like sieves until they get sealed up.