Wren Suspension Fork
The Wren Inverted fat bike suspension fork design simply works better.
By inverting the fork so that the lighter stanchions are on the bottom, we reduce the mass of the moving part of the fat bike fork so that it will react quicker and easier to the trail. This also positions the seals downward so that all kinds of bad stuff doesn't sit on them and get pulled into your fork.
The Wren TwinAir System is designed to fine tune the ride of the fork using only your air pump. No dis-assembly required.
The TwinAir system is considered a single positive air chamber and is located at the bottom of the air side stanchion. We divide this chamber in half using a floating piston.
There are individual air valves for the top and bottom chambers. By dividing the one large volume into two smaller volumes, the forces necessary to move the air are reduced allowing the fork to begin moving easier and faster. Because the piston floats, air pressure will equalize on either side of the piston as you add or release air, but the volumes of each chamber will change.
More air in the top chamber will increase its volume relative to the bottom chamber and the fork will exhibit a plusher ride. If the bottom chamber volume is larger relative to the top, the fork will exhibit a stiffer, more progressive ride.
Each Wren suspension fork is supplied with:
2 Carbon Bash Guards with carbon clamps
2 Travel Clips
2 Cable Hose Guides
Solid Capable Performance
Keyed Stanchions keep Wren suspension forks running true and prevent the stanchions from turning.
The 43mm beefy uppers are channeled to accept brass keys that fit to our oversize 36mm stanchions. The keys perfectly align the stanchions in the uppers and are designed to shear should you take a really big hit. This protects the channels and your fork from damage.
The fork will still function and the keys are easily replaced. There are 4 hub size options as listed below for 100mm, 110mm, 135mm or 150mm hubs.
Model: WSF100-110ATK or WSF100-150ATK
Hub Spacing: 100mm
Weight: 110mm Travel - 2103 g / 4.6 lb
150mm Travel - 2208 g / 4.9 lb
Wheel Size: 26" to 29"
Tire Size: Up to 2.5" depending on tire
Model: WSF110-110ATK or WSF110-150ATK
Hub Spacing: 110mm
Weight: 110mm Travel - 2050 g / 4.5 lb
150mm Travel - 2150 g / 4.7 lb
Wheel Size: 26" to 29"
Tire Size: Up to 3.0" depending on tire
Model: WSF135-110ATK or WSF135-150ATK
Hub Spacing: 135mm
Weight: 110mm Travel - 2221 g / 4.9 lb
150mm Travel - 2333 g / 5.1 lb
Wheel Size: 26" to 29"
Tire Size: Up to 4.0" depending on tire
Model: WSF150-110ATK or WSF150-150ATK
Hub Spacing: 150mm
Weight: 110mm Travel - 2151 g / 4.7 lb
150mm Travel - 2280 g / 5.0 lb
Wheel Size: 26" to 29"
Tire Size: Up to 5.0" depending on tire
Style: Inverted for better response with Keyed Stanchions and Twin Air System
AC Length: 530mm, adjustable to 520mm, 510mm or 500mm
70mm, adjustable to 560mm, 550mm or 540mm
Travel: 110mm, adjustable to 100mm, 90mm or 80mm
150mm, adjustable to 140mm, 130mm or 120mm
Offset: 45mm
Material: Steerer tube AL7050 tapered, Crown AL6066T6 3D forged, Uppers AL7050 hard anodized 43mm,
Stanchion tubes AL7050 hard anodized 36mm with forged dropouts
Brake Mount
Post mount
Axle: QR15 (included)
Damping System: Right side - sealed oil cartridge, adjustable rebound and compression with lockout.
Left side - Twin Air System, fully adjustable
Wheel Size: 26" to 29"