FTS-X - Force Transfer System X
A fruther improved FTS free wheel system to meet the demand of intensive MTB riding as closely as possible: stregthened pawls, self locking axle end screw to make the freewheel mecanism even more hard wearing and a new seal halving friction torque.
H2 - Hammer Hardening
Local strenghtening of the rim in the area where the spokes exert the greatest stress. This improves rim's life expectancy and resistance to micro cracking.
QRM - Qualité de Roulements Mavic (Mavic bearings quality)
Mavic only uses high quality sealed cartridge bearings. On QRM wheels, they provide high durability thanks to double sealing (2RS or LLU) as well as high efficiency thanks to C3 internal clearance (low play, tight tolerances).
Self Lock
The special shape of the spoke end, on the thread, makes it impossible to loosen.The spokes stays tightly screwed into the nipple, no tension loss is occuring.
As a benefit, the wheel keeps its original roundness for a long time and does not get out of true.
UB Control - Usiné Brut Control
The braking surfaces are milled to improve braking friction and eliminate shuddering.