Fatbike Suspension Fork - 135mm Hub / 110mm or 150mm Travel
Model: WSF135-110ATK or WSF135-150ATK
Style: Inverted for better response with Keyed Stanchions and TwinAir System
Hub Spacing: 135mm
AC Length: 530mm, adjustable to 520mm, 510mm or 500mm
                     570mm, adjustable to 560mm, 550mm or 540mm
​Travel: 110mm, adjustable to 100mm, 90mm or 80mm
              150mm, adjustable to 140mm, 130mm or 120mm
Offset: 45mm
​Weight: 110mm Travel - 2221 g / 4.9 lb

                150mm Travel - 2333 g / 5.1 lb
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 - TwinAir System, fully adjustable
Wheel Size: 26" to 29"
Tire Size: Up to 4.0" depending on tire
​MSRP: $999.99 - $1149.99      
Sale: $899.99 - $949.99

All TwinAir forks include carbon bash guards with carbon clamps,

2 travel clips and

2 hose/cable

​guides

MTB Suspension Fork - 100mm Hub / 110mm or 150mm Travel
Model: WSF100-110ATK or WSF100-150ATK
Style: Inverted for better response with Keyed Stanchions and TwinAir System
Hub Spacing: 100mm
AC Length: 530mm, adjustable to 520mm, 510mm or 500mm

                     570mm, adjustable to 560mm, 550mm or 540mm
​Travel: 110mm, adjustable to 100mm, 90mm or 80mm

              150mm, adjustable to 140mm, 130mm or 120mm
Offset: 45mm
​Weight: 110mm Travel - 2103 g / 4.6 lb

               150mm Travel - 2208 g / 4.9 lb
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 - TwinAir System, fully adjustable
Wheel Size: 26" to 29"
Tire Size: Up to 2.5" depending on tire
​MSRP: $999.99 - $1149.99      
Sale: $899.99 - $949.99

Wren Inverted Suspension Forks with TwinAir System
​and Keyed Stanchions

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 more plush ride. If the bottom chamber volume is larger relative to the top, the fork will exhibit a stiffer, more progressive ride.

MTB Suspension Fork - 110mm Hub / 110mm or 150mm Travel
Model: WSF110-110ATK or WSF110-150ATK
Style: Inverted for better response with Keyed Stanchions and TwinAir System
Hub Spacing: 110mm
AC Length: 530mm, adjustable to 520mm, 510mm or 500mm

                     570mm, adjustable to 560mm, 550mm or 540mm
​Travel: 110mm, adjustable to 100mm, 90mm or 80mm

              150mm, adjustable to 140mm, 130mm or 120mm
Offset: 45mm
​Weight: 110mm Travel - 2050 g / 4.5 lb

                150mm Travel - 2150 g / 4.7 lb
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 - TwinAir System, fully adjustable
Wheel Size: 26" to 29"
Tire Size: Up to 3.0" depending on tire
​MSRP: $999.99 - $1149.99      
Sale: $899.99 - $949.99

Adjustable compression lever with full lockout

Adjustable rebound knob

Damper Side

Air Spring Side

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.

Top air valve under cap

Fatbike Suspension Fork - 150mm Hub / 110mm or 150mm Travel
Model: WSF150-110ATK or WSF150-150ATK
Style: Inverted for better response with Keyed Stanchions and TwinAir System
Hub Spacing: 150mm
AC Length: 530mm, adjustable to 520mm, 510mm or 500mm 

                     570mm, adjustable to 560mm, 550mm or 540mm
​Travel: 110mm, adjustable to 100mm, 90mm or 80mm

              150mm, adjustable to 140mm, 130mm or 120mm
Offset: 45mm
​Weight: 110mm Travel - 2151 g / 4.7 lb

                150mm Travel - 2280 g / 5.0 lb
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 - TwinAir System, fully adjustable
Wheel Size: 26" to 29"
Tire Size: Up to 5.0" depending on tire
​MSRP: $999.99 - $1149.99      
Sale: $899.99 - $949.99

Air Spring Side

Damper Side

The Inverted 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 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.

Bottom air valve under cap