MAKELEN Single Speed Bike Freewheel 18T Compatible with 1/2'' x 1/8'' Bicycle Freewheel Threaded Type Freehub Replacement Parts

Material: Metal, 100% brand new and high quality., Size: 16 T: inside diameter: 1.37inch (34.8mm), outsider diameter: 2.75 inch (70mm) Weight:5 oz (142g) 18 T: inside diameter:1.37inch (34.8mm), outsider diameter:3.03inch (77mm) 6 oz (168g), Design: Silver plating,prevent metal oxidation,improve wear resistance, conductivity, reflectivity, corrosion resistance, more beautiful., Fits: Road bike, mountain bike, as long as it is single speed with 34mm outer diameter of hub thread., Easy to Install: Freewheel lightweight and compact. Easy to be removed or installed by freewheel tools.