Seatpost Support Documents
Thudbuster
SEATPOST FAQS
What kind of spring does the Thudbuster use?
The Thudbuster uses a rubber-like material (a polyurethane elastomer) combined with two pivoting arms to suspend the rider.
Can I tune the Thudbuster for my weight?
Yes. Every new Thudbuster ST seatpost includes a set of elastomers to fit your weight and riding style. The Thudbuster will come with a medium firm elastomer (150-200lbs / 68-90kg rider weight) pre-installed in the post. Thudbuster will also come with a Soft Elastomer (100-150lbs / 45-68kg rider weight) and a Firm elastomer (200-250lbs / 90-115kg rider weight) inside the box. For really lightweight and heavier riders, we also make Extra Soft (under 100 / 45kg rider weight) and Extra Firm (250-330lbs / 115-150kg rider weight) Elastomers. They are available on our Seatpost Parts and Accessories page.
For detailed elastomer installation instructions, check out our complete instruction manuals for the ST or LT.
How do I change the spring rate on my Thudbuster?
Thudbuster ST uses a two piece elastomer system. The inner elastomer can be pressed out by hand, and exchanged with the desired spring rated elastomer.
How do I know what diameter (size) to order?
The Thudbuster follows standard seatpost diameters. Different bicycles require different diameter seatposts. To find out the diameter of your seatpost, you must remove the seatpost from the bicycle frame and look for the size, which is stamped just below the “Minimum Insertion” line toward the bottom. The number will be a three-digit number (such as 26.8 or 27.2 or 31.6). If you are unable to read the size, you may need to take the seatpost to your local bike shop and have them measure it using calipers.
What if my bike uses a different size seat post other 27.2, 30.9 and 31.6mm?
Cane Creek offers various seatpost shims to accommodate a variety of seatpost diameters larger than 27.2. Click on the link provided to see the shim sizes that are available.Seatpost Parts and Accessories
What does minimum insertion line mean?
The minimum insertion line represents the least amount of seatpost length required to be installed inside the bicycle’s seat tube. Thudbuster requires a minimum of 100mm of insertion for all models.
Is there a way to fit the Thudbuster suspension onto my existing seatpost or dropper post?
No. The Thudbuster is a complete seatpost that replaces your existing seatpost.
My saddle is really low. Will there be enough room for the Thudbuster’s suspension mechanism on my bike?
The suspension mechanism requires at least 101mm (ST) from the saddle rails to the bicycle frame. This is a reasonable clearance that almost all riders with a properly sized frame will have.
Can I use my existing saddle with the Thudbuster?
Yes. The Thudbuster uses a typical saddle-clamp mechanism, allowing you to use any saddle that has the standard double-mounting rail design.
Why do my ST elastomers pop out while riding?
Perhaps you have installed your Thudbuster ST seatpost backwards. Be sure the height markings face the front of the bike!
Here is a link to our Thudbuster ST Installation Guide
What is the setback on the Thudbuster ST
0mm
This is the setback of the static (unweighted) seatpost. The setback will change once seated on the seatpost, and that amount will vary based on rider weight, elastomer choice, and bicycle geometry.
What is the setback on the eeSilk?
The setback is 8mm at the static (unweighted) position. The setback will change once seated on the seatpost, and that amount will vary based on rider weight, elastomer choice, and bicycle geometry.
What is the setback on the Thudbuster?
Thudbuster LT: 13.5mm
Thudbuster ST: 10.9mm
These are the setbacks of the static (unweighted) seatposts. The setback will change once seated on the seatpost, and that amount will vary based on rider weight, elastomer choice, and bicycle geometry.
Which elastomer(s) come standard with an eeSilk seatpost purchase?
The eeSilk comes with the #3 soft, #5 medium (installed), and a #7 firm.
How long are the seat rail clamps on the eeSilk post?
37mm
Can I use the eeSilk post on my bike with a larger diameter seat tube?
Yes, Cane Creek offers 18 different shims to fit the 27.2mm eeSilk Post into seat tubes ranging from 28.6mm to 31.8mm.
What type of seat rails are compatible with the eeSilk post?
Both oval and round, carbon and alloy seat rails are compatible with the eeSilk Post
What is the minimum insertion for the eeSilk Post?
100mm
How tall is the parallelogram system on the top of the eeSilk post?
70mm
What is the Maximum Insertion on the eeSilk post?
280mm
What kind of spring does the Thudbuster use?
The Thudbuster is an elastomer-based suspension system. The elastomers are constructed of a special blend of polyurethane in five different durometers (stiffnesses). Each elastomer is centrifuge-cast at 300 times the force of gravity to ensure the best quality and highest durability possible.
Can I tune the Thudbuster for my weight?
Yes. Every new Thudbuster ST & LT seatpost includes a set of elastomers – Soft (#3), Medium (#5), and Firm (#7) – to fit your weight and riding style. For really light and heavy riders, we also make Extra Soft elastomers (#1) and Extra Firm elastomers (#9). All elastomer options are available on our Seatpost Parts & Accessories page.
How do I know what diameter (size) to order?
Different bicycles require different diameter seatposts.
To find out the diameter of your seatpost, you must remove the seatpost from the bicycle frame and look for the size, which is stamped just below the “Minimum Insert” line toward the bottom.
The number will be a three-digit number (such as 26.8 or 27.2 or 31.6).
If you are unable to read the size, you may need to take the seatpost to your local bike shop and have them measure it using calipers.
Is there a way to fit the Thudbuster suspension onto my existing seatpost?
No. The Thudbuster is a complete seatpost that replaces your existing seatpost.