F43 suspension forks for Surron Ultra Bee
 
Its true moto architecture is built for the most aggressive riders, with tuning customization to suit your riding style.
 
Trail Tune is a very versatile and aggressive tune that is sporty and supportive, designed to go fast over a wide variety of terrain.
RIDER WEIGHT SPECS:
Sirris offers six weight ranges to choose from when selecting your Trail Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)
130 lbs - 160 lbs (Light = 4.0/4.0 springs)
160 lbs - 210 lbs (Medium = 4.8/4.4 springs)
210 lbs - 230 lbs (Heavy = 5.0/4.8 springs)
230 lbs - 250 lbs (X Heavy = 5.0/5.0 springs)
250 lbs - 280 lbs (XX Heavy = 5.4/5.0 springs)
280 lbs - 350 lbs (XXX Heavy = 5.8/5.4 springs)
Fork spring rates listed above are left side/right side.
FORK SPECS:
Architecture
Upside down fork
Travel
246 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
Triple clamps
Forged 6061 aluminum, type 3 hard anodized coating
Steer tube 
Seamless 7050 aluminum, type 2 anodized coating
Damping
Symmetrical, adjustable closed cartridge with spring backed IFP
Damper bodies
Seamless 7050 aluminum, type 3 hard anodized coating
Rebound
Dual side high tensile steel spring, adjustable
Adjusters
External compression and rebound adjustment
Seals
NBR 
Guards
High impact PP, 210-degree wraparound