Suspension Seatpost Bike Seat Post Bicycle Seat Post Shock 27.2 30.9 31.6 mm Aluminum Alloy Bike Seat Shock Absorber Damper Seat Post for MTB/ Road/ BMX Bike
... lightweight, the 30.9 seatpost fits for seat tube diameter 30.9 mm and is 350 mm(1.1 inch) long with 1-10 cm scale on..
Shock Absorber: The Bike seat post dampens vibration effectively as it's spring coil and damper rubber equipped inside while riding. Designed with an adjustable preload on the bottom, the bike suspension seat post can change the amount of force required to better absorb the vibration according to your body shape..
Adjustable Seatpost: Equipped with 2-bolt clamping head on the bike suspension seat post, you can easily clamp the saddle to point slightly down, slightly up or remain flat with adjusting angle -5° to 18°. The 1-10 cm scale on the bike suspension seat post makes it easy and clear for you to set the proper height of your bike post..
Dustproof Ring: The dustproof ring on the shaft of the MTB seat post can keep inner spring coil and damper rubber from gravel, dust or sand for longer use..
Various Use: The 30.9 mm bicycle suspension seat post offers easy-to-set, secure, durable use which makes this bike seat post shock absorber available for MTB, BMX bike. The seat post suspension for bike MAX bearing weight 150KG/330lb.(Clockwise the bottom screw if you are heavy, anticlockwise it if you are lightweight)..
1,750lbs capacity per each spring, for standard 3,500lbs trailer axle,Eye to Eye length: 25-1/4 inch, Free open: 3 inch, width of leaf: 1-3/4 inch, 4 leaves, 9/16 inch bushing dia, nylon bushings installed.
It will replace SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184 (different SKU# but same spring).
Include Complete single trailer axle hanger kit for 1-3/4" leaf springs, Kit include: 2 x 3" tall hangers, 2 x 2.1" tall hangers, 4 x shackle straps (eye to eye 3.09"), 6 x 9/16"-18 x 3" long shackle bolts and locknuts.
LIBRA has been supplying US OEM trailer industry for over 16 years, reliable and quality parts trusted by major trailer & trailer axle manufacturers..