Renthal Ultralight Rear Sprocket (Silver, 49T) 441U-428-49GPSI - KTM / Husqvarna / GasGas 85cc 2004-2026

Product Description

Maximize your power transfer and reduce unsprung weight on your youth race bike with the Renthal Ultralight Rear Sprocket. Engineered specifically for high-performance off-road riding, this sprocket delivers professional-grade durability without adding unnecessary mass to your rear wheel.

Manufactured from high-strength, specially enhanced 7075-T6 aluminum, these precision CNC-machined sprockets are 33 percent lighter than steel. The computer-aided ultra-light design drops weight significantly while featuring a specialized tooth profile that allows the chain to roll easily on and off for longer wear, less noise, and more power.

Top Features: Renthal Ultralight Rear Sprocket

• CNC-machined (not stamped) with a computer-aided ultra-light design to reduce unsprung weight and boost power transfer.
• Made from high-strength, specially enhanced 7075-T6 aluminum that is 33% lighter than steel.
• Special tooth profile allows the chain to roll easily on and off for extended wear life and less noise.
• Engineered specifically for a 428 chain size to ensure optimal drivetrain performance.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: How much weight does this aluminum sprocket save compared to steel?
A: It is constructed from high-strength 7075-T6 aluminum that is 33% lighter than comparable steel sprockets to reduce rotating mass.

Q: What chain pitch size is required for this sprocket?
A: This specific rear sprocket is designed to match a 428 chain size.

Expert Pro-Tip

Expert Pro-Tip: Always inspect your chain rollers, guides, and front countershaft sprocket when installing a new rear sprocket. Running an aluminum rear sprocket alongside worn front sprockets or a bound chain will drastically accelerate tooth wear.

Recommended Pairings:

• MX Chains
• KTM 85 SX Performance Parts & Upgrades
• Motorcycle Tools & Accessories

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.

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