Features110 SPEED GEAR SYSTEM: Provides a wider range of gears for better control and acceleration on flat and downhill terrains and cycling conditions, making it a versatile and efficient choice for commuting, travel, or road biking. 2HIGH STRENGTH FREEWHEEL: The flywheel is made of high strength steel plate with quenching process, tempered hardening treatment, multi layer electroplating, rust free and anti skid design for fine shifting. 3LIGHTWEIGHT CRANKSET: The crankarm is made of aluminum alloy, which is lightweight, stylish appearance, fashionable design, high axle strength, and strong compatibility with most bike models. 4FINE GEAR SHIFTING: With trigger shift and rear derailleur chain set, our bike gear kit makes it possible that gearing shifts are much finer and easier to operate than traditional shifters. 5 GIFT: This bike gear set is an ideal gift for your husband, wife, boyfriend, girlfriend, or kids' bike, suitable for scenes such as back to school, Christmas, Valentine's Day, Mother's Day or Father's Day, Thanksgiving, or New Year's gift.SpecificationItem Type: 10 Speed GroupsetMaterial: Aluminium alloyWeight: Approx. 2300g / 81.13ozFreewheel Tooth: 11 13 15 18 21 24 28 32 36 40TPackage List1 x Flywheel3 x Flywheel Accessory1 x Tail Hook1 x Tail Hook Screw1 x Front Derailleur1 x Rear Derailleur1 x Chain2 x Chain Buckle1 x Chain Case1 x Left Crank Arm1 x Right Crank Arm1 x Bottom Bracket1 x Crank Accessory1 x Chainring