Renthal Steel Standard 503 - 428 Output sprocketRef : RT00058A / 1074258002

Renthal Steel Sprocket Standard 503 - 428 (manufacturer's ref: 503--428-14P)

Designed for off-road and motocross competition, this RENTHAL sprocket is precisely machined from nickel-chrome-molybdenum alloy steel to provide a good balance between durability and reduced weight. Its standard tooth design and careful finish minimize premature wear and contribute to smooth power transfer from the chain to the rear wheel — ideal for riders seeking reliability and consistency on runs and jumps.

• Type: sprocket 503, standard version
• Material: steel (nickel-chrome-molybdenum alloy)
• Teeth: 14 teeth
• Chain pitch: 428
• Reduced weight compared to stock components — good balance between efficiency and longevity
• Recommended for competition and off-road use

This sprocket is particularly suited for the small displacement motocross models listed below, but is compatible with any motorcycle that fits the 428 pitch and 503 mounting. Check the desired number of teeth to adjust your final ratio based on terrain and riding style.

• KTM 85 SX STD WHEELS 17/14 (2025 - 85 cc)
• HUSQVARNA TC 85 BIG WHEELS 19/16 (2025 - 85 cc)
• GAS GAS MC 85 19/16 (2025 - 85 cc)