Surron Ultra Bee Sirris F43 Fork | MX Tune, 246mm Travel

This Surron Ultra Bee fork is the Sirris F43 in MX Tune: 246mm of travel and firm, bottoming-resistant damping for jumps, whoops, and fast corners. It trades some trail plushness for support at speed.

Specs:

• 246mm travel, upside down architecture - long-travel MX layout sized for the Surron Ultra Bee.
• 856mm free length.
• 43mm stanchions in high tensile steel with hard chrome.
• Seamless 7050 aluminum outer tubes and damper bodies, type 3 hard anodized.
• Forged 6061 aluminum drop outs and triple clamps, type 3 hard anodized - forged, not billet, on the Ultra Bee version.
• Symmetrical closed cartridge with spring backed IFP - adjustable compression and rebound damping.
• External compression and rebound adjusters.
• 22 lbs / 10kg including clamps and steerer.
• NBR seals, 210 degree high impact PP guards.
• MX Tune: motocross-specific, firm, maximum bottoming resistance.
• Spring rates by rider weight: Light (120 to 160 lbs): 4.4/4.4 springs; Medium (160 to 200 lbs): 5.0/4.8 springs; Heavy (200 to 240 lbs): 5.4/5.0 springs; X Heavy (240 to 280 lbs): 5.4/5.4 springs; XX Heavy (280 to 320 lbs): 5.4/5.4 springs.

Fits the Surron Ultra Bee:

• Surron Ultra Bee

Does NOT fit: Surron Light Bee, Surron LB2

Surron Ultra Bee F43 Fork FAQ

Who is MX Tune for?

Riders on a track or jumping big. MX Tune is firm and built to resist bottoming at the highest speeds. If you mostly ride trails, the Trail Tune version is plusher.

Which spring rate do I pick?

Pick by your weight without gear; Sirris builds 15 pounds of gear into every range. Rates are listed left side / right side. See the full list under Specs.

How is this different from the Trail Tune version?

Same F43 chassis, same 246mm travel. The difference is the valving tune and the spring rate ladder. MX Tune is the one on this page.

Is this the same fork as the 220mm F43 for other bikes?

No. The Surron Ultra Bee F43 is longer: 856mm free length and 246mm of travel, with forged drop outs and clamps. It is built for the Ultra Bee only.

What can I adjust?

Compression and rebound both adjust externally, so you can tune feel without pulling the fork apart.

Ships from USA!