I've been given conflicting advise about the 'better' Shimano front and rear derailleurs - is there someone who actually knows who could rank the following from best to worst with a short note of the differences (these are as fitted to the Norco VFR 3 & VFR 4 and the Pinnacle Lithium 1 & 2):
- Rear derailleurs
- Shimano Altus RD-M310 7 speed - Black
- Shimano RD-TX75 (I believe that this is a 'Tourney')
- Shimano Acera RD-M390 - Black
- Front derailleurs
- Shimano Tourney FD-TX51
- Shimano FD-TX503
- Shimano Acera FD-M360
