Surron Ultra Bee

F43 SX Tune Fork | LSC | 260mm Travel

Built for Beast Mode. The Sirris F43 SX Tune is the stiffest, most aggressive fork in the lineup—made for sponsored and pro riders only. If you’re not hucking triples, smashing whoops at full speed, or living on the limiter, this suspension will feel way too firm. But if you are? Welcome to SX spec.

Engineered with a true symmetrical closed cartridge system, hydraulic bump stop, and high-tensile lightweight springs, the F43 SX is designed to deliver absolute consistency, even under race-level abuse. No fade. No compromise. Just full-send suspension that thrives on the biggest hits.

Complete the setup with the R46 SX Shock!

Why Choose SX Tune 🏁

• Pro-Level Stiffness – The firmest tune in the F43 lineup

• Motocross Beast Mode – Handles the gnarliest jumps, landings & whoops

• Hydraulic Bump Stop – Softens harsh landings at max stroke

• Closed Cartridge System – Consistent damping, lap after lap

• Fully Adjustable – Compression, rebound & preload for dialed control

⚠️ Warning: Unless you’re a pro or sponsored rider, this fork will be too stiff.

Built to Last ⚡

• Dual Oil Circuits – Separate damping & lubrication for max performance

• High-Quality Materials – Hard anodized 7XXX aluminum for strength & scratch resistance

• Race-Ready Durability – No compromises, even under pro-level abuse

⚡ The stiffest F43 ever. The fork built to go big—every lap, every time.