Story is, I have a Scandal ,slick shod for work duties. Thinking long term and may need to do 10 miles a day with rather than 4, so have bought some bits to make it 1 X 10 and abort the single speed. I thought road and mtb parts were compatible. So I bought a 10 speed 105 rear mech, had an 11 to 23 Ultegra cassette in the cupboard, a 10 speed chain and , what I thought would work, a 10 speed Zee shifter. Well, its not working , as the shifter is only giving me 7 or so shifts across the cassette. I also changed the rear mech for an XT 9 sp one to see if that would help but no, it was the same as the 105. So,seems I need a 10 sp shifter to make it work. Does the Zee have a differing pull ratio to other systems and what shifter should I get ?
Cheers
The short answer is that Shimano 10 speed mountain and road shifters are incompatible, the long answer can be found by Googling "Shimano 10 speed road mountain compatibility" and diving into the many and varied threads that brings up.
Ultimately the easiest way for you to get a setup working with minimum investment is to pick up a mtb rear mech.
I guess I will have to get the Zee rear mech, as that's the only short cage mech to fit , as don't want a long arm one on an 11 to 23 cassette. I did a google on Zee and nothing came up on compatability, but didn't check in road to mtb ratio of cable pull.