Well I finally got a 2.125 on a 3 1/4'' rim. It took some work. It didn't just jump on there.
I tried a ching shien or whatever they are called. It didn't seem to want to stretch that wide.
This time I used a Kenda flame. One of the ones with the silly colored flames on it. I used a
3'' tube instead of a regular 26 one. It wanted to start coming off the bead before the part
around the air valve got seated. I kept sticking a little air in and letting it back out till I got all
the bead the same. Then hit it with air. I took some lacquer thinner on steel wool and got the
dumb little flames off of the tire. Its not the best combination but at least I did get a 2.125 on
a wide rim.
I tried a ching shien or whatever they are called. It didn't seem to want to stretch that wide.
This time I used a Kenda flame. One of the ones with the silly colored flames on it. I used a
3'' tube instead of a regular 26 one. It wanted to start coming off the bead before the part
around the air valve got seated. I kept sticking a little air in and letting it back out till I got all
the bead the same. Then hit it with air. I took some lacquer thinner on steel wool and got the
dumb little flames off of the tire. Its not the best combination but at least I did get a 2.125 on
a wide rim.