I usually use road mecht on my MTB : mavic on my Merlin, campy on my klein attitude, ( and if possible, small cage mecht.)
I prefer the design, the esthetic, and the clearence too.
I use 32t cogs with them. Yes, it's big, but I change the spring for a stronger and they work fine. (On the campy derailleur, it's an old chorus whith 2 position, A and B. With the B position, the parallelogram could go on very big cogs.)
I agree with andrewl : short cage mtb seems to be "medium" in road. On my heihei, I tried with a DuraAce 7400, but I had some problem. So, I changed for a XT with small cage and the shifting is more sure and confortable.
On rear suspension bike : it's a long cage for the c'dale EST (the cage work a lot with the swingarm) but, on the RS1, it's a campy road deraillleur and still now, I don't have problems.
The main thing iportant is to shift with care and to not cross the chain (small ring and small cog, or big ring and big cog…)
I prefer the design, the esthetic, and the clearence too.
I use 32t cogs with them. Yes, it's big, but I change the spring for a stronger and they work fine. (On the campy derailleur, it's an old chorus whith 2 position, A and B. With the B position, the parallelogram could go on very big cogs.)
I agree with andrewl : short cage mtb seems to be "medium" in road. On my heihei, I tried with a DuraAce 7400, but I had some problem. So, I changed for a XT with small cage and the shifting is more sure and confortable.
On rear suspension bike : it's a long cage for the c'dale EST (the cage work a lot with the swingarm) but, on the RS1, it's a campy road deraillleur and still now, I don't have problems.
The main thing iportant is to shift with care and to not cross the chain (small ring and small cog, or big ring and big cog…)