02-4157: Honda CRF250R 2018-2021 CRF450R 2017-2020 Aluminum Subframe

Upgrade your bike with the Honda CRF250R 2018-2021 CRF450R 2017-2020 aluminum subframe (SKU 02-4157) from AC Racing—a direct-fit replacement designed to restore OEM-style alignment and deliver race-ready durability. Whether you’re replacing a bent stock subframe after a crash or refreshing a full rebuild, this subframe provides a solid foundation for proper seat and rear plastics fitment while improving rigidity for hard riding conditions.

Made in the USA using U.S. materials and expert craftsmanship, this CRF250R/CRF450R aluminum subframe is heli arc welded for maximum strength and a true handcrafted look. It’s built from thick wall 3/4" aluminum tubing (.125 wall) to resist fatigue from vibration, impacts, and repeated hard landings—helping your rear-end setup stay tight and aligned over time.

For a secure, reliable bolt-on fit, all mounting points are CNC machined from billet aluminum, ensuring consistent alignment where it matters most. Each subframe is also tumble finished with ceramic spheres for a clean, uniform finish that looks as good as it performs.

Highlights

• SKU 02-4157

• Fits Honda CRF250R 2018–2021 and CRF450R 2017–2020

• Made in the USA

• Heli arc welded for strength and a handcrafted look

• 3/4" thick wall aluminum tubing (.125 wall) for enhanced rigidity and longevity

• CNC-machined billet aluminum mounts for dependable fitment

• Ceramic-sphere tumble finish for a clean, uniform appearance

Questions about fitment before ordering? Contact AC Racing at sales1acracing@gmail.com or (951) 245-4040 (Mon–Fri, 12 PM–6 PM EST).