Purification for the Quervelo
Recently, Sram transferred the technologies from the XX1 single-chainring drivetrain to the downhill bike - now it's the turn of the cross-country racer with the Force CX1 groupset:
Of course, the single crankset features an X-Sync chainring with alternating wide and narrow tooth spacing for a secure chain fit. The chainrings will be available in sizes 38, 40, 42, 44 and 46 teeth. The crank is constructed from rectified carbon fibers and the chainring is held in place by a forged aluminium spider. The weight is 710 grams (GXP bottom bracket version, 42 teeth, crank length 172.5 mm) or 542 grams for the BB30 bottom bracket.
The rear derailleur offers so-called Exact Actuation for fast and precise shifting with the help of a 1:1 gear ratio when the shifter cable is pulled in and the rear derailleur moves.The derailleur pulley has a 12-tooth design to control the lateral movement of the chain.- The parallelogram design of the rear derailleur limits the movement along the horizontal axis, thus eliminating ghost shifting and reducing the shifting force at the same time. The unidirectional clutch of the roller bearing clutch regulates the chain tension for constant shifting behavior.With the middle cage, the rear derailleur weighs 261 grams.
The brake/shift lever - for the mechanical brake, of course - uses Red lever technology. The left-hand lever has no shifting function and weighs just 119 grams, while the right-hand lever with shifting mechanism for the 11 gears weighs 158 grams.
The groupset is completed by the PG-1170 cassette with 11 sprockets and the three gradations 11-26, 11-28 and 11-32 as well as the PC-1170 chain, which is designed to extend the service life of the drivetrain with its chrome-reinforced pins.
Note: This content has been automatically translated from German. Please report any incorrect translations.