Lightweight Design-FASTACE is a lightweight spring damper designed and manufactured for fast downhill bikes. Its inner and outer tubes, upper and lower plates, left and right legs are made of aluminum alloy with high strength and light weight, and the interior is designed with spring and oil pressure damping.
 
Hydraulic Damping System--The hydraulic damping system is inside the front fork right tube, that is, damping force generated by reciprocating motion of piston and valve plate in hydraulic oil is used to suppress vibration and impact caused by acceleration and deceleration of vehicles and road bumps.
 
The internal damper adopts wear-resistant, low freezing point,special oil for high quality shock absorber to ensure the damping stability and reliability. Alloy Steel Spring Design--High strength alloy steel spring design is used inside the front suspension left tube, which can reduce weight and support the rider's weight compared with the conventional spring, so as to meet the various needs of your daily riding.
 
Inverted fork design for stiff and precise handling
200mm Travel
37mm Lower inner Stanchion Tubes 
Strong tapered upper outer tubes
Compression Adjuster
Rebound Adjuster
Coil Spring
Internals made from steel for strength and long life
Open bath damper design (like a motorcycle fork)
Valve stack design like a motorcycle with multiple strong shims for long life on a surron and fully tune-able for a future custom tuned fork
Fender mounting points
Fully compatible with Surron and Talaria OEM headset!!!
for heavy rider : 
50lbs spring- 80-100kg riders weight
60lbs -100kg-120 kg riders weight
Progressive hard spring 38lbs-60lbs - 80-120kg riders weight