Compatible to ACE Line frame (For P/T Line version in developing), You do need a 3rd party rear wheel with multi-cogs compatibility to take over 4 speed cogs (not included).
Compatible up to 28T cog (original max 18T on P/T Line)
Titanium Tensioner Spring.
Smooth surface treatment with multiple colours to match your style.
Limited colour might only be available in 1st batch production.
Listing only for one derailleur set (Spring activated main body, 2 Jocky wheels, fixture for ACE Line and extended tensioner arm included). Cogs, thumb shifter, shifting cable and 3rd party upgrade wheelset are optional.
Tested 11-28t / 7 speed.
Ideal combo with our X4 Unibody Cog Set (11-13-17-21t) to reuse original 2/6 speed rear wheel.
Note :
Preorder now, estimated delivery end of September.
This modification is more difficult than the rather easy "plug and play" X3 Unibody Cogset external 3 speed upgrade. (please expect some more time and patience to finetune the result).
Do not recommand this as a DIY project, please consult your LBS mechanic before order.