Renthal UltraLight 415-38P 38-Tooth Rear Sprocket, Black

Renthal UltraLight Rear Chainwheels are CNC machined from 7075 T6 aluminum to extremely tight tolerances, 66% lighter than steel. Computer engineered and tested to ensure a precise fitment, concentricity and load dispersion with tooth profiling to provide maximum power transfer. A combination of high strength base material, cutting edge manufacturing methods and exceptional hardwearing surface treatments its clear to see why Renthal's light weight all aluminum rear sprockets can be found on the rear wheels of many factory race team machines.

The Renthal UltraLight 415-38P rear chainwheel is a high-performance replacement sprocket designed for select KTM and Husqvarna 50cc motocross motorcycles. CNC machined from 7075-T6 aluminum, it delivers substantial weight savings compared with conventional steel sprockets while maintaining the strength and precision required for demanding track use. The black finish provides a clean appearance and durable surface protection.

Renthal computer-engineers each sprocket for accurate fitment, excellent concentricity, and balanced load distribution. The tooth profile is developed to promote efficient power transfer and consistent chain engagement, helping maintain reliable drivetrain performance. Advanced manufacturing methods and hardwearing surface treatments help the sprocket resist wear during repeated acceleration, shifting, and off-road riding.

This Renthal rear sprocket features a 415 chain pitch and 38-tooth configuration. It is designed for use with the original-style rear wheel and drivetrain applications listed below. Confirm the motorcycle model, year, chain size, and current gearing before installation. Proper chain tension and alignment are essential for maximizing sprocket life and maintaining safe operation.

Product Specifications & Technical Data

• Brand: Renthal
• Part Number: REN491--415-38P-BK
• Product Type: Rear chainwheel
• Material: 7075-T6 aluminum
• Chain Pitch: 415
• Tooth Count: 38
• Color: Black
• Manufacturing Method: CNC machined

What's Included

One Renthal UltraLight 415-38P rear sprocket.

Fitment

Fits 2014-2018 KTM 50 SX models, including 2014-2017 KTM 50 SX Mini applications, and select 2021-2023 Husqvarna TC 50 applications as specified by the vehicle manufacturer. Verify exact fitment before ordering.

Features:

• Lightweight 7075-T6 aluminum construction reduces unsprung drivetrain weight compared with steel sprockets.
• CNC-machined design supports precise fitment, concentricity, and consistent load distribution.
• Computer-engineered tooth profile promotes efficient power transfer and smooth chain engagement.
• Hardwearing surface treatment and black finish help support durability in motocross and off-road conditions.

Fitments:
2014 KTM 50 SX Base
2014 KTM 50 SX Mini Base
2015 KTM 50 SX Base
2015 KTM 50 SX Mini Base
2016 KTM 50 SX Base
2016 KTM 50 SX Mini Base
2017 KTM 50 SX Base
2017 KTM 50 SX Mini Base
2018 Husqvarna TC50 Base
2018 KTM 50 SX Base
2018 KTM 50 SX Mini Base
2019 Husqvarna TC50 Base
2019 KTM 50 SX Base
2019 KTM 50 SX Mini Base
2020 Husqvarna TC50 Base
2020 KTM 50 SX Base
2020 KTM 50 SX Mini Base
2021 Husqvarna TC50 Base
2021 KTM 50 SX Base
2021 KTM 50 SX Mini Base
2021 KTM SX-E 5 Base

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
Clearance Item: t
Units Per Sku: 1