Renthal Ultralight 51T Rear Sprocket – Honda CR/CRF & XR Series

Description

Fits:

• CR125R (1983–2007)
• CR250R (1984–2007)
• CR500R (1984–2001)
• CRF250R (2004–2025)
• CRF450R (2002–2025)
• XR400R (1996–2004)

PN: 154U-520-51GRBK

Renthal Ultralight Rear Sprocket – Pro-Level Performance. Race-Proven Results.

At MSV Racing, we trust one name when it comes to aluminum rear sprockets—Renthal. Their Ultralight™ Rear Chainwheels are the go-to choice for 95% of our builds, and for good reason: they win races.

Engineered with precision and trusted by champions, Renthal’s commitment to innovation and availability has made them a staple on podiums worldwide for over 40 years.

⚙️ Key Features:

• CNC-Machined from 7075-T6 Aircraft-Grade Aluminum
• 66% Lighter Than Steel Sprockets – lower rotating mass means faster acceleration
• Computer Engineered Tooth Profiles – optimized for maximum power transfer
• Hardwearing Surface Treatments – exceptional durability in all riding conditions
• Perfect Fitment & Load Dispersion – race-tested and rider-approved

Why Renthal?

With industry-leading manufacturing techniques and a deep history in powersports racing, Renthal Ultralight sprockets are trusted by more factory race teams than any other brand on the planet.

Dominate the track. Shred the trail. Gear up with Renthal.
🛒 Available now from MSV Racing—your source for performance that wins.