Cygolite Streak 600/Hotshot120 Headlight/Taillight Set MFPN=B-W4EC9BBBAXE2 and the ratchet wheel is

and the ratchet wheel is generally used on the rear wheel

} Aerodynamics redefined

Speed 12 Chainline 45mm BCD Direct Mount SRAM 8 Bolt Crankset Material Carbon Teeth 40 Crank Arm Length 172

Color Black Lower Stack Height 1 Bearing Type Cartridge Crown Race 30 Weight 71 Defined Color Black Upper Stack Height 9 S

Brake Lever Actuation HydraulicBrake Caliper Type Post MountRotor Included NoBrake Lever Use LeftColor BlackHydraulic Fluid Type Mineral OilPad Compound OrganicHydraulic Hose Length 950Adjustable Reach YesAdjustable Contact Point Yes

Cygolite Streak 600/Hotshot120 Headlight/Taillight Set MFPN=B-W4EC9BBBAXE2 and the ratchet wheel isVersatility in its smallest form yet USB rechargeable Streak offers commuters brightness and advanced 24 7 Safety Technology for safer night and day riding. The hotshot casts an extra wide beam to maximizes your presence from afar and a specially treated internal body disperses a radiant glow to keep nearby motorists alert. Adjustable brightness and flash tempo to get the right amount of light for the situation. Lumens Rear 120 Lumens Front 600