Im trying to set the bead on my rim but when I pump up the tire the air just goes away. But when I look at it, the tire is fully on the rim. I also know it is 100% not the pump. Because I just did another tire today.
by KillerMTB
Im trying to set the bead on my rim but when I pump up the tire the air just goes away. But when I look at it, the tire is fully on the rim. I also know it is 100% not the pump. Because I just did another tire today.
by KillerMTB
5 Comments
Sometimes the pump works and sometimes it doesn’t. Use a compressor or a Co2 cartridge.
If this has been setup before for tubeless you could have leftover latex sealant bits stuck to the edge of the tire rim. They will not allow an airtight seal to form. If you take some natural rubber or scrubbing pad and scrape off the latex you should have better luck.
You need a quick burst of air from an air compressor or charge pump for tubeless to get the bead seated
Here is the multi step process I take to get stubborn tubeless tires to seat.
Seat tire with tube first. Unseat the bead only on one side. If your rim is asymmetrical, unseat on the side that is farthest away from spokes. Remove tube. install tubeless valve. If it’s traditional presta design, remove valve core. Spray bead with some sort of lube, such as soapy water. Start pumping tire.
The key here is making sure your bead is away from the dimples in the rim tape caused by the spoke holes. Once you accomplish that, you’re mostly golden.
Did you try soapy water on the rim? Sometimes it needs help sliding into place.
I have 2 bikes. 3 rims go right on, and one, I end up going to my LBS and getting the service guys to give it a blast with their compressor. I’ve tried all the tricks, but one is a bear.