Do this:
http://www.go-ride.com/Articles/ghetto_tubeless.html
BUT do the following modifications to the procedure:
1A - Use a schroeder valve tube. It is more durable, it will let you flow much more air when inflating, and it is easier to put more stans in later. Presta valves are for roadies.
2A - Clean the powder out of the inner tube using simple green and a ton of water. Get all the powder out. This cannot be emphasized enough. Get it really really clean. Residual powder = slow leaks at the bead.
3A - Before you start mounting the tire onto the rim give the tube and the tire bead a quick wipe down with a paper towel that is wetted with brake cleaner. It will remove the last of the powder from the tube and the release compound from the tire bead. It will also give you cancer.
4A - Now that you wiped the tube and tire down with brake cleaner it is a real beeyatch to mount the tire, as they want to grip each other like nothing you've ever experienced. DO NOT use soap and water to lubricate. Use a thin coat of "latex mold builder" (
http://www.michaels.com/art/online/d...ductNum=gc0514) to lube the bead as you slide it on.
6A - For big tires use 3 or 4oz of stans. The extra ounce isn't going to kill you, but it comes in handy when you get a huge puncture.
6B - Besides the 3oz of stans add 1 heaping teaspoon of the "latex mold builder" and stir it into the stans. It helps the stans work better on larger punctures and small tears.
6C - If the tire is really tight and you are having trouble getting the last part of the bead over the rim lip make yourself some "rim protectors". Fold a piece of duct tape in half, then fold a piece of packaging tape over the duct tape. Use the tape to protect the rim strip from your tire irons when you lever the bead over the rim. Difficult to explain, I'll post some photos.
6D - Ignore the directions to build up the center of the rim with tape to make a tight seal. Your air compressor takes care of that when used properly.
7A - Rotate the wheel so the valve is towards the top (and the stans is now 180 degrees away in the bottom of the tire). Remove the valve core of the schroeder valve. Remove the tire chuck from your air compressor,. leaving just the quick connect. Add air to the valve stem straight from the quick connect. The valve stem will actuate the quick connect and you will get a huge volume of air that will seat the tire instantly. No more f-ing around with soap and water and oozing stans and squeezing the tire and getting pissed off. The above method WILL seat your tire on the rim.
7B - Wrestle the valve core back into the valve stem. Try not to coat yourself with stans (thats why I had you rotate the stem upwards).
The heavier duty of tube you use as a rim strip the less likely you will slice the sidewall of your tire open, but it becomes a real bear to seat the tires because the tube is so thick. On my downhill wheels I use a 20" thorn resistant tube, but it is nearly impossible to mount hutchinson wire bead tires without messing up the bead.
The pipe tape method is lighter but much much less reliable and prone to burping. If you lose pressure on the trail you are done, the tire will "de-bead" from the rim and you will have to put a tube in. With the tube strip method the tire and the tube strip lightly glue themselves together over time. You can totally deflate the tire then pump it back up with a compact pump, it won't "de-bead".
Weight:
performance 20" BMX tube: 130 grams
stans: 80 grams
mold builder: 14 grams
excess tube trimmed off: -73grams
Total weight: 151 grams.
A 26" slime tube weighs 310 grams.
The only real problem with ghetto tubeless is swapping tires. Since the tire and the rubber rim strip "stick" to one another you have to carefully peel the tire bead off the rim strip before dismounting the tire, otherwise you'll destroy the rim strip.
Usually the rubber rim strip will hold its shape and you can put a new tire on no problem, but sometimes it wants to curl inwards away from the edge of the rim. When that happens I just use scotch tape to hold the rim strip where it should be, then I yank the tape out before seating the bead.
The following least->best ratings are what I've found over the years. My opinion only, others may agree/disagree.
Reliability (least to best):
Ultralight tube + std tire
Standard tube + std tire
Slime Tube + std tire
UST rim + std tire + sealant
Ghetto tubeless + std tire + sealant <-my preferred all mountain setup
UST rim + UST Tire + sealant
Ghetto tubeless + UST tire + sealant <- my preferred downhill setup
Weight (lightest to heaviest):
Ultralight tube + std tire
Ghetto tubeless + std tire + sealant (assuming xm719 or stans 355XC rims)
Standard tube + std tire
UST rim + std tire + sealant (assuming 819 rims)
Ghetto tubeless + std tire + sealant (assuming EN521rims)
Slime Tube + std tire
Ghetto tubeless + UST tire + sealant
UST rim + UST Tire + sealant
try it you'll like it.
original post:
http://forums.mtbr.com/showthread.php?t=568378&highlight=ghetto