Sirris F43 CMX Front Fork for Surron LBX / LBS & E-Ride Pro S / SS 2.0

Medium (140 - 180 lb) / Standard Crown / Black

$2,249.95

Sirris F43 CMX Front Fork for Surron LBX / LBS & E-Ride Pro S / SS 2.0

$2,249.95

Spring Rate

Crown Option

Color

RIDE IT ONCE. REGRET EVERYTHING ELSE.

The Sirris F43 CMX Front Fork is a serious front-end upgrade for riders who want more control, more confidence, and a harder-charging e-moto setup.

Built with an oversized F43 chassis and CMX-tuned closed cartridge damping, this fork is made for sharper handling, stronger front-end feel, and elite-level ride performance on compact e-moto builds.

⚡ HIGHLIGHTS

• Oversized F43 race-built chassis
• CMX-tuned closed cartridge damper
• 220mm fork travel
• Tool-free external compression adjusters
• Nearly 30 clicks of compression adjustability
• Direct Mount stem ready
• Ultra-stiff axle and dropout assembly
• Replaceable caliper mount brackets
• Optional drop clamp setup for 21” front wheel conversion
• Built for aggressive compact e-moto riding

🔧 FITMENT

Compatible with:

• Surron LBX
• Surron LBS
• E-Ride Pro S
• E-Ride Pro SS 2.0

🏁 SPRING RATE OPTIONS

Select your fork tune based on rider weight without riding gear.

• 140–180 lbs: Medium — 3.6 / 3.2 springs
• 180–220 lbs: Heavy — 3.6 / 3.6 springs

Spring rates are listed as left side / right side. Approximately 15 lbs of riding gear is already calculated into the listed range.

🔩 KEY SPECS

• Architecture: Upside-down fork
• Travel: 220mm
• Free length: 775mm
• Fork spacing: 178mm
• Fork weight: 4 kg per leg
• Stanchions: Ø43 high-tensile steel, hard chrome
• Outer tubes: Seamless 7050 aluminum, Type 3 hard anodized
• Dropouts: 6061 aluminum, Type 2 anodized
• Steer tube: Seamless 7050 aluminum, Type 2 anodized
• Damping: Adjustable closed cartridge with spring-backed modified IFP
• Seals: NOK MX seals
• Bushings: Daido MX bushings
• Guards: High-impact PP, 210-degree wraparound

⚠️ INSTALL NOTE

Professional installation is strongly recommended. Confirm proper fitment, steering tube setup, brake mounting, axle alignment, wheel clearance, and front-end function before riding.