Sirris F43 CMX Front Fork | E Ride Pro SR

RIDE IT ONCE. REGRET EVERYTHING ELSE.

The Sirris F43 CMX is the highest performance compact e-moto fork available for the E Ride Pro SR. Built around an oversized race-spec 43mm chassis and paired with Sirris’ CMX-tuned closed cartridge damper, this fork delivers elite-level front-end precision, unmatched durability, and confidence at speed.

Engineered specifically for high-performance e-moto riding, the F43 CMX offers razor-sharp steering response, superior bottom-out resistance, and exceptional front tire feedback across motocross tracks, technical terrain, and aggressive street setups.

Key Features

CMX Tuned Closed Cartridge System

Advanced symmetrical closed cartridge damping system with spring-backed modified IFP design for consistent performance and improved front-end feel.

Tool-Free Compression Adjusters

Nearly 30 clicks of external compression adjustment without requiring tools for fast trackside tuning.

Direct Mount Stem Compatibility

DM-ready upper clamp design allows direct compatibility with most existing direct mount stem setups.

Oversized 43mm Chassis

Race-built chassis with high-tensile steel stanchions and oversized construction for increased rigidity and steering precision.

Configurable Axle & Brake Mount System

Replaceable caliper brackets and ultra-stiff axle assembly improve braking stability while supporting wheel and brake upgrades.

Optional Drop Clamp Setup

Optional drop clamp raises the front end 25mm for 21” wheel conversions while maintaining full 220mm travel.

Fitment

Compatible with:

• E Ride Pro SR
• E Ride Pro SS 3.0 (stiffer ride feel due to heavier spring rates)

Spring Rate Options

Medium Spring Setup

• Rider Weight: 140–180 lbs
• Spring Rate: 4.0 / 4.0

Heavy Spring Setup

• Rider Weight: 180–220 lbs
• Spring Rate: 4.4 / 4.0

Rider weight ranges exclude riding gear. Approximately 15 lbs of gear is factored into recommendations.

Fork Specifications

Performance Benefits

The F43 CMX transforms front-end performance with:

• Increased steering precision
• Improved high-speed stability
• Superior damping consistency
• Better bottom-out control
• Enhanced front tire traction and feedback
• Increased durability under aggressive riding conditions

Built for riders demanding true motocross-level suspension performance from their e-moto platform.

Important Notes

• Some configurations may require pre-order lead times
• Optional drop clamp recommended for 21” wheel conversions
• Professional installation recommended
• Rebound adjustment requires tools
• Installation guide available upon request