SteveD wrote: ↑Fri Jul 13, 2018 4:40 amThanks. Does it lose air? I have a newly powderoated snowflake that I want to try tubeless.
This applies only to PRE-SINGLE SIDED cast wheels...
When I bought the bike in 2014-15 the PO was already running tubeless front and rear. He had coated the interior of the rim with some type of gooey sealant to stop the porosity issue. I have since seen similar tire products for cast car wheels, but don't remember any specific names. Both my wheels (tube type and tubeless) loose about 2-4psi per month. So 'no', they don't leak despite me adding 30,000+ miles.
I'm currently running tubeless Bridgestone BT-45 "Battlax" tires F&R, both at 33-34psi. These were mounted with a generous amount of pro tire lubricant (1 gal/$6) to make the bead pop-out (seat) easier, but I think it also adds to the sealing efficiency of the bead.
If your rim interior was also powder coated, I think your air holding issues are taken care of. Otherwise you might look for a porosity sealer of some description. A last ditch attempt might be enamel paint for aluminum, which you brush on (simply to avoid hours of tedious masking).
Obviously, you'll also need a bolt-on, mag wheel, tire stem, and I would highly suggest anything
except straight.
Maybe these stems?
The
BIG thing you'll notice is that tubeless tires fit much tighter onto the snowflakes. Thus the need for pro tire lube. Even with that Michelins, Bridgestones, Avons, and Heidenaus sometimes take in
excess of 60psi to fully pop out.
This has left me looking for a lathe set up so I can turn my rim smooth on the interior and get rid of the "as cast" surface. Needless to say, I've also had to buy special tools to break the bead loose when it came time to remove the tire.
Hope this story helps in some way.