Any tips apprecaited. Have set up several wheels tubeless before. Currently refurbing one of my old bikes, and wanted to set up the Dt swiss 4.2s tubeless with maxxis cross ark/advantage combo. Using a coke bottle compressor.
Both tyres seat fine and go up, but air is pissing out from the nipple eyelets and the valve. So I re taped, same, tried another layer, same, tried a third layer of duct tape, same. Tried a different valve, same, tried a mavic valve with little orings, same. Tried a split inner tube with valve in, still the same!
Don't know what else to try, all I can think is the air is escaping around the valve into the rim. Looking in it is quite a void between top and bottom of the rim. Is there anything I can stick in there to stop it? I'm thinking about bathroom sealent but that is probably kind of permanent.
Anything else I could be missing? Rim looks okay, no holes in the side/base
What tape and sealant are you using?
Is the rim drilled for Schraeder and the valve too small to seal in that?
First layer of tape is stans, next superstar, then duct ! Sealant is stans all have worked fine for me in the past.
Pretty certain the valve hole is a presta....but now you've got me thinking it might not be
pretty certain it's a presta, about 1mm of wiggle room with a presta in. Will try to find a Schroeder to test, never used them with anythin but presta inner tubes,
Check that the valve hole has been drilled cleanly - no burrs or false starts on the inside of the rim. Cut the hole in the tape for the valve very carefully & slightly smaller than the hole in the rim so that when you put the valve in it forces the tape into the valve hole slightly.
Worked for me. YMMV.
Make sure the rim is clean before applying tape (isopropyl & clean rag/etc). The tape also seems to stick better when the wheels are warm (not in a cold garage)