Sirris R46 MX Tune Ultra Bee Shock

Sirris R46 MX Tune Ultra Bee Shock – Unleash True MX Performance

Take your Ultra Bee to the next level with the Sirris R46 MX Tune Shock, engineered for riders who crave ultimate control, stability, and speed. The MX Tune is built specifically for motocross—offering a perfect balance between firm suspension and precise handling. Whether you’re tackling whoops, sending huge jumps, or flying through tight corners, the R46 gives you the confidence and support you need to ride harder, faster, and smoother.

Choose between EBMX or MX spec for the ideal setup—each tuned for aggressive terrain and maximum bottoming resistance. This shock doesn’t just improve performance—it transforms your entire riding experience.

Rider Weight Options

Sirris offers five finely tuned weight ranges for a perfect match to your riding style. (Weight ranges listed exclude gear; 15 lbs of riding gear is already factored in.)

• LIGHT: 54–73 kg / 120–160 lbs — Ships with 85 N/mm spring

• MEDIUM: 73–91 kg / 160–200 lbs — Ships with 95 N/mm spring

• HEAVY: 91–109 kg / 200–240 lbs — Ships with 105 N/mm spring

• X HEAVY: 109–127 kg / 240–280 lbs — Ships with 115 N/mm spring

• XX HEAVY: 127–145 kg / 280–320 lbs — Ships with 115 N/mm spring

Product Specifications

• Architecture: Piggyback, steel spring

• Stroke: 85 mm

• Length: 320 mm

• Weight: 3.9 lbs / 1.76 kg (without spring)

• Piston: Ø46 mm high-flow CNC 6061 billet aluminum, Type 3 hard anodized

• Shaft: Ø16 mm OD chrome-plated, hollow steel, induction hardened

• Shock Body: Seamless 6061 aluminum, Type 3 hard anodized coating with ACME thread

• Spring Retainer: ACME thread with locking feature and manual adjust

• Bottom Out: MCU bumper

• Top Out: Rubber bumper

• Damping: Tunable compression and rebound

• Reservoir: Pressurized with floating piston

• Adjusters: External compression and rebound controls

• Seals: NBR

Why Choose Sirris R46 MX Tune Shock from eBikePartsNZ?

When you buy from eBikePartsNZ, you’re not just getting a premium shock—you’re investing in expert-backed performance and service.

• 100% genuine Sirris parts
• Tuned for New Zealand riding conditions
• Fast, reliable shipping
• Local support from e-bike suspension specialists
• Trusted by professional and recreational riders alike