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The Thudbuster G4 is superior to its predecessor in every way. Building on Thudbuster’s proven parallel linkage technology we have completely re-designed the seatpost for increased durability and additional suspension travel, as well as ease of use through tool-free elastomer change and a single-bolt seat clamp design.
For over 20 years, Thudbuster has been the bicycle industry standard in suspension seatposts by providing unequaled comfort and reliability to riders around the world.
For any questions, contact us through our Support Center.
The latest generation Thudbuster LT is superior to its predecessor in every way. Building on Thudbuster’s proven parallel linkage technology we have completely re-designed the seatpost for increased durability, additional suspension travel, as well as ease of use through tool-free elastomer change and a single-bolt seat clamp design.
By improving on this already legendary design, we’re confident to say that the newest generation Thudbuster is the most advanced suspension seatpost ever made.
The Thudbuster Parallel Linkage technology stays in the direct path of the natural travel of the rear wheel. As a bump lifts the back of a bicycle, the rear wheel pushes up and forward into the rider. The Thudbuster works by compressing along the exact opposite path — down and rearward — absorbing force at the same rate.
This results in a natural suspension feel without being overly active, and allows for more travel without compromising pedaling position.
| Setback | 5mm (unweighted) |
|---|---|
| Post | Forged aluminum |
| Seat Clamp | Single bolt fastening and angle adjustment design |
| Pivots | Threaded, serviceable, hard anodized aluminum axles flanged PTFE bushings |
| Elastomer | Medium firm elastomer pre-installed from the factory. Extra Soft, Soft, Firm, and Extra Firm elastomers sold separately |
| Travel | 90mm / 3.54in |
| Length | 27.2 – 390mm. 30.9 + 31.6 – 420mm |
| Weight | 750 grams (31.6) |
| Max Rider Weight | 250lbs / 113kg |
| Extension | Minimum – 146mm Maximum – 290mm for 27.2, 320mm for 30.9 +31.6 |
| Diameter (Direct Fit) | 27.2, 30.9, 31.6 (additional diameters available with seatpost adapter) |
Hello, our Thudbusters were not designed to be used with very relaxed seat tubes, however, they will work. We would recommend using a stiffer elastomer.
Hello, thanks for reaching out, it is possible to use our Thudbuster in these temperatures, however, the elastomer will stiffen up significantly in these temperatures.
Hello, we do not offer a different saddle clamp kit for oval rails, sorry.
Hello, our Thudbuster seat post can be used on cargo bikes that offer a 27.2, 30.9 and 31.6mm seat tube.
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Verified OwnerVery disappointed. Bought this from you for my girlfriend who wanted some suspension for her hard tail . Bought XS elastomer also as she weighs under 140 lbs. Changing elastomers was much harder than shown in video and offers very little movement. Also the seat clamp is a bad design, needs to be extremely tight to stop tilt movement !
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