Originally Posted by
mountaindave
Did you get this worked out? Early 90's Shimano RD's were amazingly cross compatible. I took the long cage off of a trashed Deore DX body and put in on a Tricolor body for my wife for the very same reason you need a long cage. It won't do a 1x10 11-42 cassette, but it will handle a 13-26 x 45/28 no problem. I can never get a picture of it because my wife is always commuting on it...
This is a very late response-- but I ended up picking up a 12-28 cassette, which was stated to be in the acceptable range for the 1055 short cage derailleur. It seems to be working just fine and it gave her a little more gearing. The 1055 crankset has 52/42 rings, and I have considered swapping the 42 for a 39, to give her even more gearing, but I haven't really looked into that yet.
But thanks for the info--- I will try that if it turns out we still need more.
Jared