1.Our gang bike cassette is made of highquality steel material, which is resistant to high temperatures, corrosion, rust, deformation, wear, high durability, good impact resistance, high tooth form precision, lost tooth design, strong compatibility, makes riding more possible 2.Ensures smooth acceleration and precise positioning within the gear range, whether you are dealing with steep climbs or unevenness on flat roads, this bike cassette can provide efficient power transmission and reliable shifting 3.The bike flywheel is made of nickelplated steel sheet with highstrength, multilayer galvanization and rustproof treatment 4.The bike flywheel rotates smoothly and quietly and can directly replace the old or damaged flywheel 6.The flywheel for bicycles is made of steel, is hightemperature resistant, corrosionresistant, rust, deformation, wearresistant, has high durability, good impact resistance, highprecision tooth form, a lost tooth design and high compatibility, making riding even more comfortable. 7.This bicycle wheel is characterized by a smooth rotation without much noise. The highprecision internal thread ensures a tight connection with the bicycle hub. 8.The wheels of the flywheel have clear indications of the number of teeth, which act as precise guide wheels, thus ensuring a quieter riding experience. 9.Professional manufacturing, directly replace your old or broken wheel. Wonderful accessory for mountain bikes and racing bikes. Easy installation, no adjustments to the transmission required.