Derailleur Relaxed position:
High normal or top normal rear derailleurs return the chain to the smallest sprocket on the cassette when no cable tension is applied.This is the regular pattern used on most Shimano mountain, all Shimano road, and all SRAM and Campagnolo derailleurs. In this condition, spring pressure takes care of the easier change to smaller sprockets. In road racing the swiftest gear changes are required on the sprints to the finish line, hence high-normal types, which allow a quick change to a higher gear, remain the preference.
Low normal or rapid rise rear derailleurs return the chain to the largest sprocket on the cassette when no cable tension is applied. While this was once a common design for rear derailleurs, it is relatively uncommon today. In mountain biking and off-road cycling, the most critical gear changes occur on uphill sections, where riders must cope with obstacles and difficult turns while pedaling under heavy load. This derailleur type provides an advantage over high normal derailleurs because gear changes to lower gears occur in the direction of the loaded spring, making these shifts easier during high load pedaling.
addition: Rapid rise derailleurs seem also to be prefered in combination with Shimano dual control levers (the brifters).
My WANTED list:
- Lefty; preferably post 2013 version. - C'dale Headshok 80mm DLR - SuperV / Raven Swingarm
- Magura louise Raceline yellow - purple 3DV ano cranks - Wide handlebars (700mm) 25.4 clamp
- Seatpost and clamp for Manitou - White/Grey Tires (psychos) - Hutchinson Scorpion UST grey
- RS Judy Crown with 1 1/8" steerer (Thread or Ahead)