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F43 SX Tune | Tool Free LSC | 260 mm Travel | Surron Ultra Bee 1.2

F43 SX Tune | Tool Free LSC | 260 mm Travel | Surron Ultra Bee 1.2

Spring Rate
Tune
Clamp Color
$2,550.00 USD
$2,550.00 USD
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Taxes included. Shipping calculated at checkout.

PRO RIDERS ONLY

Now featuring tool-free LSC adjustment, Torx fasteners, and updated graphics.

SX Tune is built for the biggest hits, hardest landings, and highest speeds. SX Tune is our stiffest, most aggressive suspension setup, engineered for pro-level riders who demand maximum support when pushing the limits. PRO-LEVEL RIDERS ONLY.

RIDER WEIGHT SPECS:

Sirris offers two weight ranges to choose from when selecting your SX Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)

< 160 lbs (Light = 5.4/5.0 springs)
> 160 lbs (Medium = 5.8/5.0 springs)

Fork spring rates listed above are left side/right side.

FORK SPECS:

Architecture
Upside down fork with symmetrical and adjustable pressurized closed cartridge dampers

Travel
260 mm

Free length
856 mm

Fork weight, includes clamps and steerer
22 lbs / 10kg

Stanchions
Ø43, high tensile steel with hard chrome

Outer tubes
Seamless 7050 aluminum, type 3 hard anodized coating

Drop outs
Forged 6061 aluminum, type 3 hard anodized coating

Brake mounting
Sized for stock Ultra Bee calipers and 240mm rotors

Triple clamps
Billet 6061 aluminum, type 2 anodized coating, 2 color options (blue, black)

Steer tube 
Seamless 7050 aluminum, type 2 anodized coating

Damping
• SX tune
• Symmetrical and adjustable closed cartridge with spring backed IFP
• High-flow pistons and fully tunable compression and rebound valving
• Dual oil circuits for optimum performance. Separate oil circuits deliver optimized damping and lubrication performance.
• Balanced, race-ready, high performance. No matter how hard you ride or how many laps you put in, Sirris closed-cartridge forks deliver consistent, fade-resistant performance and predictable handling lap after lap.
• The hydraulic bump stop system provides progressive bottom-out control, delivering softer landings and maximum usable travel, even under the most aggressive impacts.

Damper bodies
Seamless 7050 aluminum, type 3 hard anodized coating providing high durability and scratch resistance to keep your ride in top condition.

Spring
Dual side high tensile steel spring, adjustable preload

Adjusters
External tool-free compression, rebound adjustment
(rebound adjusted tooled to ensure durability in the harshest environments)

Seals
NOK Heavy Duty seals  

Bushings
Premium Daido bushings (Custom Sirris proprietary design)

Guards
High impact PP, 210-degree wraparound 

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Black Friday at Radmoto

October 21–November 3: Free Warp9 31.8mm handlebars with an eligible in-stock Sur-Ron or E Ride Pro bike purchase.

Choose your Warp9 handlebar color and add the bars to your cart with an eligible bike. The handlebar discount applies automatically at checkout during the offer dates—no code needed.

One set per eligible bike, while supplies last. Confirm clamp compatibility before ordering. Handlebars ship separately at no extra charge. Cannot be combined with other discounts. Questions? Contact Radmoto.

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