Sirris R46 SX Tune Rear Shock | By Sirris Suspension | For Sur-Ron Ultra Bee

BUILT FOR BEATS MODE!
Our Stiffest Setup for the Fastest Riders

At REV Rides we see a lot of riders pushing the Sur-Ron Ultra Bee to levels most stock suspension simply cannot handle. The Sirris R46 SX Tune Shock is built for those riders. Developed in collaboration with pro rider Josh Hill, this setup is the most aggressive suspension option Sirris offers for the Ultra Bee.

The SX Tune is purpose-built for riders who are riding fast, racing hard, and hitting massive features. With firmer damping, a stiffer bottom-out bumper, and heavier spring options, this shock is designed to handle the biggest impacts and the highest speeds without losing control. If your riding includes large jumps, aggressive track riding, or high-speed terrain, this shock gives the rear suspension the support it needs to stay composed.

To be clear, this is not a casual trail setup. The SX Tune is extremely firm and designed for elite-level riding. Riders who are not regularly hitting large jumps or riding at race pace will likely find the suspension too stiff. But for riders pushing the limits of the Ultra Bee platform, this shock delivers the highest level of performance available.

Why the R46 SX Tune Shock Stands Out

• Developed with Josh Hill for elite-level Ultra Bee performance

• Extra stiff SX tune designed for the biggest hits and fastest riding

• High-flow Ø46mm piston provides strong damping control

• Piggyback reservoir maintains pressure balance and prevents fade

• Stiffer bottom-out system designed for huge jump landings

• Fully adjustable compression and rebound for precise tuning

• Heavy-duty construction built to handle aggressive riding

• Fully rebuildable design allows long-term service and custom tuning

SX Tune Performance

The SX Tune is the stiffest suspension configuration Sirris offers for the Ultra Bee. It prioritizes maximum support and bottom-out resistance for the most aggressive riding scenarios.

• Built for huge jumps and aggressive landings

• Maximum rear-end support at motocross speeds

• High-speed stability through whoops and rough track sections

• Designed for expert riders and racers

Technical Specifications

• Architecture: Piggyback reservoir, steel spring

• Shock Length: 320 mm

• Stroke: 85 mm

• Piston: Ø46 mm CNC 6061 billet aluminum, Type III hard anodized

• Shaft: Ø16 mm chrome-plated induction hardened hollow shaft

• Shock Body: Seamless 6061 aluminum, Type III hard anodized with ACME thread

• Spring Retainer: 6061 aluminum, Type III hard anodized with locking feature

• Reservoir: Pressurized with floating piston

• Damping: Tunable compression and rebound

• Bottom Out: Reinforced bottom-out system for large impacts

• Top Out: Rubber bumper

• Seals: NBR

Rider Weight Options

• Light: Under 160 lb rider weight

• Medium: Over 160 lb rider weight

Rider weight ranges are based on body weight without riding gear. Approximately 15 pounds of riding gear is factored into the recommended range. Upgrades such as heavier batteries or controllers should also be included when calculating total rider weight.

SX Tune Setup Notes

• Settings are measured in clicks from the fully closed position

• Turn adjusters fully clockwise, then back out to recommended settings

• Designed for aggressive riders hitting large jumps and high-speed terrain

• Riders near weight cutoffs may adjust preload to fine tune sag

• Not recommended for casual trail riding

Fitment

• Sur-Ron Ultra Bee

Ideal Riders for This Shock

• Pro-level or sponsored riders pushing the Ultra Bee to its limits

• Motocross riders hitting large jumps and aggressive track features

• Ultra Bee builds designed for maximum suspension performance

Fitment: Sirris R46 E-moto shock w/ SX tune By Josh Hill | for Surron Ultra Bee

• Surron Ultra Bee

This product may be compatible with more models than shown above. Please see the product description for full details, or contact us for help with fitment.