Airdrop Filter Specifications

Filter Geometry
Airdrop Filter Geometry Chart
Size S M L XL
A Reach 425 455 475 500
B Seat Tube 400 425 450 480
C Head Tube 115 120 125 130
D Stack 605.3 609.7 614.5 618.8
E Wheelbase 1167.2 1199.3 1221.4 1248.5
F Head Angle 65°
G Seat Angle 74.5°
Seat Angle at 600mm 78.7°
Seat Angle at 700mm 78.1°
Seat Angle at 800mm 77.7°
H Chainstay 430
I Bottom Bracket Drop -22
J Fork Length 542
K Fork Offset 37
Filter Frame Spec
Frame Airdrop Filter
Material 6061 T-6 Alloy
Travel 150mm front / 135mm rear
Wheel Size 27.5"
Bottle Cage Mount Yes
Front Mech Mount No
Rear Shock Size 185x55mm Metric
Rear Shock Mount Trunnion upper / M8x25mm lower
Bottom Bracket 73mm BSA30 threaded
Chain Guide Mount ISCG05
Headset Top 1 1/8" / 44mm inset (ZS44)
Headset Bottom 1 1/2" / 56mm inset (ZS56)
Seatpost Diameter 30.9mm
Seat Clamp Diameter 35mm
Rear Axle Boost 148x12mm Maxle compatible
Rear Brake Mount Post
Minimum Rotor Size 180mm
Maximum Rotor Size 203mm
Maximum Tyre Size 27.5" x 2.6"
Cable Routing External with Stealth Dropper
Filter Spring Rate

Choosing the right spring rate is key to getting the most out of a coil shock. Work out your total rider weight - including your normal riding kit - then use this chart to choose a spring. You can use the shock's preload adjuster to do the fine tuning later.

 

Please Note

These spring rates are calculated based on the Filter's kinematics. Even if you're used to running coil shocks on other bikes, you may need to check the right spring for the Filter. These calculations are based on 28% sag and a 65% rear / 35% front weight bias. On the Filter's 185mm shock length, 28% sag measures at 169.6mm eye-to-eye.

Rider Weight Spring Rate Preload Turns
50kg - 54kg 300lb 0
55kg - 59kg 0.5 - 1.5
60kg - 64kg 2 - 3
65kg - 69kg 350lb 0.5 - 1
70kg - 74kg 2 - 3
75kg - 79kg 400lb 0.5 - 1
80kg - 84kg 2 - 3
85kg - 89kg 450lb 0.5 - 1
90kg - 94kg 2 - 3
95kg - 99kg 500lb 0.5 - 1
100kg - 104kg 2 - 3
105kg - 109kg 550lb 0.5 - 1
110kg - 114kg 2 - 3
115kg - 119kg 600lb 0.5 - 1
120kg - 124kg 2 - 3
Filter Sizing
S 155cm - 167cm (5'2" - 5'6")                  
M       165cm - 178cm (5'5" - 5'10")            
L             175cm - 188cm (5'9" - 6'2")      
XL                   185cm - 198cm (6'1" - 6'6")