Can-Am Maverick R / Polaris RZR Pro R 1-Inch Rear Shock Shaft Upgrade Kit from Shock Therapy is offered for the verified applications and configurations shown below. Review fitment and the selected option before ordering.

Explore more Shock Therapy products or shop UTV parts by model.

Boost your suspension’s durability and performance with our Rear Shock Shaft Upgrade Kit, designed to replace the factory 7/8" rear shock shaft with a high-strength 1" shaft. Built for aggressive riding and demanding terrain, this upgrade delivers increased stiffness, improved damping control, and long-term reliability.

Key Features:

• Heavy-Duty Shaft Upgrade: Replaces the OEM 7/8" shaft with a robust 1" shock shaft for enhanced strength and resilience.

• Improved Performance: The larger diameter reduces flex under extreme loads, improving shock consistency and feel.

• Precision Engineering: Machined to exact tolerances for a direct fit into the factory rear shock body (may require minor modification).

• Race-Ready Strength: Designed for riders who demand more from their suspension — whether it’s dunes, desert, or track.

• Complete Kit: Includes 1" shock shaft, upgraded seal head components, and all necessary installation hardware.

Why Upgrade?
The stock 7/8" shaft is fine for stock power and moderate use — but when you start riding harder, adding weight, or pushing big power, it becomes a weak point. Upgrading to a 1" shaft gives you the strength and stability needed to handle harsh landings and high-speed abuse without compromise. *Please note that for the Pro R Dynamix will come with a Shock Therapy Shock Guard replacement!*