Rfloxa RAF55RV Rear Shock for Sur-Ron Ultra Bee

The Rfloxa RAF55RV rear shock is made for the Sur-Ron Ultra Bee. An external nitrogen reservoir and an oil-from-gas separated design keep the damping consistent even on long, hard rides.

What oil-from-gas separation gives you

In simpler shocks the oil mixes with the gas under load — it foams, and the damping fades. What you feel is the rear of the bike starting to “wallow” and bounce after a few minutes of hard riding. An external nitrogen reservoir with separation solves that — the shock behaves the same in the first minute of a run as in the last.

What it fits

• Sur-Ron Ultra Bee

Running a different model? Get in touch — we'll match a shock to your setup.

Choosing the spring for your weight

• 450 lbs: 65–85 kg
• 550 lbs: 75–105 kg
• 650 lbs: 95–135 kg

The weights given are rider weight in full kit. On the border between two ranges your riding style decides — jumps and aggressive riding — the stiffer spring.

Specification

• Axle spacing (centre distance): 320 mm
• Travel: 85 mm
• Main tube diameter: Ø16 mm
• Piston diameter: Ø40 mm
• External nitrogen reservoir
• DLC-coated tube
• Oil-from-gas separated damping design
• Material: AL6061-T6 aluminium upper mount, AL7075-T6 main tube, 42CRMO steel shaft
• Spring: 55CRSI steel

Adjusters

• Rebound: 20 clicks
• High-speed compression: 3 turns — sharp hits and landings
• Low-speed compression: 22 clicks — braking and weight transfer in a corner

Splitting compression into high-speed and low-speed lets you run the suspension soft over small chatter and firm on landings — something you cannot reconcile on a shock with a single adjuster.

Lead time

12 working days.

Worth adding

• Warp 9 rear shock cover — 4 mm neoprene; one grain of sand under the seal means an oil leak
• Rfloxa Ultra 43 fork — also for the Ultra Bee
• Ultra Bee parts and e-moto suspension

More: how to choose a fork, rear shock and spring.

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