RIDER WEIGHT SPECS

Sirris offers five weight ranges to choose from when selecting your MX Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)

120 lbs - 160 lbs (Light = 4.4/4.4 springs)

160 lbs - 200 lbs (Medium = 5.0/4.8 springs)

200 lbs - 240 lbs (Heavy = 5.4/5.0 springs)

240 lbs - 280 lbs (X Heavy = 5.4/5.4 springs)

280 lbs - 320 lbs (XX Heavy = 5.4/5.4 springs)

Fork spring rates listed above are left side/right side.

FORK TUNES:

Trail:

Trail Tune is a very versatile and aggressive tune that is sporty and supportive, designed to go fast over a wide variety of terrain.

MX:

MX Tune is a motocross specific tune with balance, control, and bottoming resistance for the fastest speeds. It's firm suspension for maximum control and support for huge jumps, whoops and fast cornering. If you select the EBMX or MX spec, you’ll compromise a bit of trail plushness for improved bottoming resistance.

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

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