The Renthal 441U-428-48GPSI UltraLight Rear Chainwheel is a CNC-machined rear sprocket made from 7075 T6 aluminum. Its lightweight aluminum construction is engineered to reduce weight compared with steel while maintaining strength for powersports applications.
Computer engineering and testing support precise fitment, concentricity, and load dispersion. The tooth profile is designed to promote efficient power transfer, while the hardwearing surface treatment helps support durability in demanding riding conditions. This sprocket features a 428 chain size and 48 teeth with a grooved silver finish.
Fitment includes the 2005–2008 KTM 85 SX (19/16), 2009–2011 KTM 105 SX, and the product listing also identifies compatibility with 2004–2019 KTM 85SX, 2017–2020 Husqvarna TC85, and 2023 GasGas MC85 applications. Manufacturer part number: 441U-428-48GPSI. Vendor part number: 441U-428-48GPSI.
Features:
- Construction: CNC machined from 7075 T6 aluminum
- Chain Size: 428
- Tooth Count: 48 teeth
- Design: UltraLight rear chainwheel with grooved profile
- Finish: Silver
- Performance: Computer engineered and tested for precise fitment, concentricity, and load dispersion
- Tooth Profile: Designed to provide efficient power transfer
- Fitment: 2005–2008 KTM 85 SX (19/16) and 2009–2011 KTM 105 SX
- Manufacturer Part Number: 441U-428-48GPSI
- Vendor Part Number: 441U-428-48GPSI
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1
Fitment:
2005 KTM 85 SX (19/16) Base
2006 KTM 85 SX (19/16) Base
2007 KTM 85 SX (19/16) Base
2008 KTM 85 SX (19/16) Base
2009 KTM 105 SX Base
2010 KTM 105 SX Base
2011 KTM 105 SX Base