The Renthal 441U-428-47GPSI UltraLight Rear Chainwheel is a CNC-machined aluminum rear sprocket designed for powersports applications. It is manufactured from 7075 T6 aluminum and engineered to provide a precise fitment, concentricity, load dispersion, and efficient power transfer. Its grooved design and silver finish complement the lightweight construction.
Renthal states that this rear sprocket is 66% lighter than steel and is produced to tight tolerances using computer-engineered and tested manufacturing processes. The tooth profile is designed to support maximum power transfer, while the high-strength base material and hardwearing surface treatments are intended for demanding riding conditions.
This sprocket fits the 2005–2008 KTM 85 SX (19/16), 2009–2011 KTM 105 SX, 2017–2020 Husqvarna TC 85, and 2023 GasGas MC 85, as specified by the supplier. The manufacturer part number is 441U-428-47GPSI, and the vendor part number is 441U-428-47GPSI. Verify the motorcycle model, year, wheel configuration, chain size, and tooth count before installation.
Features:
- Brand: Renthal
- Model: UltraLight Rear Chainwheel
- Manufacturer Part Number: 441U-428-47GPSI
- Vendor Part Number: 441U-428-47GPSI
- Chain Size: 428
- Tooth Count: 47
- Material: CNC-machined 7075 T6 aluminum
- Design: Rear grooved sprocket
- Finish: Silver
- Weight Advantage: Stated to be 66% lighter than steel
- Fitment: 2005–2008 KTM 85 SX (19/16), 2009–2011 KTM 105 SX, 2017–2020 Husqvarna TC 85, and 2023 GasGas MC 85
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: t
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