Freewheel 13/14/15/16/17/18/19/20T Fixed Gear Bicycle Black Wheel Cogs Strengthen Sprocket & Lockring For 1 Speed Track Bike Bicycle Accessories(17T)

Specifications:- Material: Aluminum Alloy - Teeth: 13T 14T 15T 16T 17T 18T 19T 20T optional per order option- Color: Black - N.W. (with ring): 13T 23g / 14T 26g / 15T 29g / 16T 32g / 17T 36g / 18T 39g / 19T 42g / 20T 47gThere might be a bit of color distortions due to different computer resolutions.There might be a slight error due to different hand measurements.Can only be used on a fixed gear bike.Flywheel Adjustable Gear Number : 1-speedGear Teeth : 13 -20TFreewheel Speed : 1Components : Freewheel

• 1. Versatile Terrain Handling
• Derailleurs allow quick adjustment of gear ratios to tackle diverse terrains:
• Climbing: Low gear ratios (small sprocket + large chainring) reduce pedaling force for steep hills.
• Descending/Flat Roads: High gear ratios (large sprocket + small chainring) maximize speed using momentum.
• 2. Reduced Fatigue
• By shifting gears instead of forcing a fixed ratio, derailleurs distribute effort across different muscle groups, minimizing lactic acid buildup and extending endurance.
• 3. Joint Protection
• Proper gear selection optimizes pedaling posture:
• Low gears reduce knee strain during climbs by minimizing deep knee bends.
• High gears ease lower back pressure during fast cruising.