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30.9- mm 356+ mm Bicycle Seatposts

The seatpost diameter must match to the seat tube diamater of your frame. If replacing a seatpost, you can usually find this measurement etched near the bottom of your current post.

Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.

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Showing 198 products:

Cane Creek Thudbuster ST G4 Suspension Seatpost - 30.9 x 375mm, 50mm, Black
Cane Creek Thudbuster ST G4 Suspension Seatpost - 30.9 x 375mm, 50mm, BlackCane Creek

Building on Thudbuster's proven parallel linkage technology Cane Creek has completely re-designed the seatpost for increased durability, a higher rider … read more

your price $199.99 + ships free

BuyBuyPART NUM 705891
OneUp Components Dropper Post, (180mm) 30.9x480mm
OneUp Components Dropper Post, (180mm) 30.9x480mm

New OneUp dropper line covers 100-210mm drops in 10mm increments Shortest overall length and stack height of any equal length dropper on … read more

$31 offretail $215.99 your price $184.99 + ships free

BuyBuyPART NUM 177602
SDG I-Beam Unidirectional Carbon Micro-Adjust Seatpost 0mm Setback 30.9x400mm
SDG I-Beam Unidirectional Carbon Micro-Adjust Seatpost 0mm Setback 30.9x400mm

SDG I-Beam Micro Carbon Seatposts. I-Beam technology eliminates seat rails for a single beam incoporated into the saddle shell. I-Beam provides the … read more

$35 offretail $129.99 your price $94.99

BuyBuyPART NUM 941165
Bike Yoke Revive Seatpost With Triggy Remote (125) 30.9 x 397mm, Black
Bike Yoke Revive Seatpost With Triggy Remote (125) 30.9 x 397mm, Black

Self-serviceable dropper post with reset button at the head Non-IFP design provides better reliability and extremely smooth action … read more

StarStarStarStarStar 5 of 5 ( 1 ) 5 of 5 stars ( 1 review )

$81 offretail $374.99 your price $293.94 + ships free

BuyBuyPART NUM 433261
Tranz-X Hot Lap Dropper Seatpost, 50mm, 30.9 x 400mm, Black
Tranz-X Hot Lap Dropper Seatpost, 50mm, 30.9 x 400mm, Black

Internal cable routing Suited for gravel, XC and CX Lightweight hydraulic cartridge Item Specifications travel/drop: … read more

your price $129.99 + ships free

BuyBuyPART NUM 272711
Thomson Elite Covert Dropper Seatpost: 30.9 x 400mm 125mm Travel
Thomson Elite Covert Dropper Seatpost: 30.9 x 400mm 125mm TravelThomson

Item Specifications Length: 400 Diameter: 30.9 Travel: 125 Clamp Style: Std Rails … read more

$150 offretail $479.95 your price $329.95 + ships free

BuyBuyPART NUM 213345
Kind Shock LEV Ci Dropper Seatpost, 30.9 x 390mm, 100mm, Black, No remote
Kind Shock LEV Ci Dropper Seatpost, 30.9 x 390mm, 100mm, Black, No remoteKind Shock

LEV CI takes rhythm from the trail and injects it straight into your soul 65-175 millimeters of perfect drop are just enough to turn your … read more

$80 offretail $429.99 your price $349.94 + ships free

BuyBuyPART NUM 764365
KS Supernatural 30.9 Post 435/150mm Remote - OPEN BOX SPECIAL
KS Supernatural 30.9 Post 435/150mm Remote - OPEN BOX SPECIALKind Shock

Kindshock Height-Adjust Seatposts Micro-adjust, zero offset clamp Infinitely-adjustable ride height Carbon remote replaces an … read more

$69 offretail $366.00 your price $296.46

BuyBuyPART NUM 903421
OneUp Components V3 Dropper Post, (150mm) 30.9 X 400mm
OneUp Components V3 Dropper Post, (150mm) 30.9 X 400mm

The lightest infinitely adjustable dropper post available Shortest total length of any dropper post (measured seat rails to end of actuator) … read more

$45 offretail $314.99 your price $269.99 + ships free

BuyBuyPART NUM 988871
Bike Yoke Divine SL Seatpost Without Remote, 125mm, 30.9 x 445mm, Black
Bike Yoke Divine SL Seatpost Without Remote, 125mm, 30.9 x 445mm, Black

Tailored to the needs of XC and marathon racers, the DIVINE SL is the youngest offspring of Bike Yoke dropper family. Based on the award-winning … read more

your price $320.00 + ships free

BuyBuyPART NUM 368258
Tranz-X Skyline Dropper Seatpost, 125mm, 30.9 x 410mm, Black
Tranz-X Skyline Dropper Seatpost, 125mm, 30.9 x 410mm, Black

Internal routing Sealed hydraulic cartridge 6061 construction Item Specifications travel/drop: 125mm diameter: … read more

your price $119.00 + ships free

BuyBuyPART NUM 709306
Tranz-X Jump Seat Dropper Seatpost, 100mm, 30.9 x 365mm, Black
Tranz-X Jump Seat Dropper Seatpost, 100mm, 30.9 x 365mm, Black

Easy to install and easy to operate No cables required Lever actuated under the saddle to drop and raise your saddle Seat height … read more

your price $119.00 + ships free

BuyBuyPART NUM 474086
Cane Creek G4 Thudbuster-LT Seatpost, 30.9 X 420mm
Cane Creek G4 Thudbuster-LT Seatpost, 30.9 X 420mmCane Creek

90mm of travel for XC, Gravel or Comfort use Patented 4-pivot parallel linkage with PTFE bushings Pedal to saddle distance remains … read more

StarStarStarStarStar 4 of 5 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $199.99 + ships free

BuyBuyPART NUM 636243
KS LEV Dropper Seatpost - 30.9mm, 125mm, Black, Remote Not Included
KS LEV Dropper Seatpost - 30.9mm, 125mm, Black, Remote Not Included

The versatility of the LEV design allows clean cable routing on bikes not intended for dropper posts. When the remote is pushed, there is zero cable … read more

$29 offretail $299.00 your price $269.10 + ships free

BuyBuyPART NUM 113582
KS LEV Dropper Seatpost - 30.9mm, 150mm, Black, Remote Not Included
KS LEV Dropper Seatpost - 30.9mm, 150mm, Black, Remote Not Included

The versatility of the LEV design allows clean cable routing on bikes not intended for dropper posts. When the remote is pushed, there is zero cable … read more

$29 offretail $299.00 your price $269.10 + ships free

BuyBuyPART NUM 605525
Thomson Elite Seatpost Black 30.9 mm x 410 mm
Thomson Elite Seatpost Black 30.9 mm x 410 mmThomson

Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any other production … read more

StarStarStarStarStar 4.5 of 5 ( 4 ) 4.5 of 5 stars average ( 4 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 972863
RockShox Reverb AXS Dropper Seatpost - 30.9mm, 170mm, Black
RockShox Reverb AXS Dropper Seatpost - 30.9mm, 170mm, BlackRockShox

The RockShox Reverb AXS is optimized, motor driven, and paired with the next generation of electronic integration. It features Vent Valve Technology and … read more

StarStarStarStarStar 5 of 5 ( 1 ) 5 of 5 stars ( 1 review )

$103 offretail $861.00 your price $757.68 + ships free

BuyBuyPART NUM 985982
Thomson Elite Set Back Seatposts - Black - 30.9 x 410 mm
Thomson Elite Set Back Seatposts - Black - 30.9 x 410 mmThomson

The Elite Set Back Thomson Seatpost has a post and cradle which are machined from one piece of 7000 aluminum. Post and cradle are machined from one … read more

your price $114.95 + ships free

BuyBuyPART NUM 112698
Thomson Elite Seatpost Black 30.9 mm x 367 mm
Thomson Elite Seatpost Black 30.9 mm x 367 mmThomson

Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any other production … read more

StarStarStarStarStar 4.5 of 5 ( 4 ) 4.5 of 5 stars average ( 4 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 503967
Bike Yoke Revive Seatpost without Remote, 185mm, 30.9 x 484mm, Black
Bike Yoke Revive Seatpost without Remote, 185mm, 30.9 x 484mm, Black

Self-serviceable dropper post with reset lever at the head Non-IFP design provides better reliability and extremely smooth action All … read more

your price $390.00 + ships free

BuyBuyPART NUM 582109
Cane Creek

"The world's best choose Cane Creek. A key element of Cane Creek's mission is to support the sport of cycling, including racing, charitable activities and cycling advocacy. Cane Creek believes strongly in the power of bicycles and their potential to effect positive change in our society. To that end, Cane Creek supports athletes and teams whose purpose encompasses more than competitive racing, such as getting more people on bikes, improving or promoting a healthy lifestyle, and making our world better through the use of a bike."

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Thomson

Thomson is leading with innovative design for two primary markets - aerospace and cycling.

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Kind Shock

Kind Shock is an industry leader in suspension and dropper seat posts.

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RockShox

"An icon in the mountain bike industry."

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DT Swiss

Driven by the vision of becoming a worldwide known manufacturer of bicycle components, DT Swiss expanded its product range over the years. Today DT Swiss has established itself as a leading manufacturer of spokes, nipples, hubs, rims, complete wheels as well as suspension systems.

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Ritchey

"Ritchey bicycle components have been raced to victory in some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics and it all began in a simple garage in Menlo Park, California with Tom Ritchey.'

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Whisky Parts Co.

"Whisky Parts Co. makes high quality carbon components designed with unique features that help you do more with your bike and stand out from the rest. We believe that our work can help every rider find a new level of confidence and performance with our sturdy and lightweight forks, bars, rims and more. So whether you are building a new bike or upgrading one you already have, you'll find an uncommon attention to detail in every product we offer."

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Salsa

"At Salsa, we believe a sense of adventure makes life better. The bicycle can be so much more than just a bike; it's a path to new places, new people, and amazing experiences."

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Full Speed Ahead

"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."

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Answer

Answer BMX makes BMX racing components.

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We define color as the main color of the item. It may have accents or highlights in other colors.

Weight

These products are one of our best sellers.

In Store products are available to view in our showroom. In Store orders usually ship the same or next business day.

These models are available for online purchasing and can be shipped directly to you.

The seatpost diameter must match to the seat tube diamater of your frame. If replacing a seatpost, you can usually find this measurement etched near the bottom of your current post.

Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.

Offset is often referred to as setback. This is the distance in mm that the clamp is offset from the center of the seatpost.

Seatpost Material

On a dropper post, this is the distance that the post will drop.

Suspension seatposts are designed with comfort in mind.

Seatpost Clamp Style

Dropper posts have the ability to change heights. This has become a choice for mountain bike riders that prefer multiple riding positions.

Rigid seatposts are the most common type of seatpost with no suspension or dropping capability.

Clearance items can save you big.

Our Lowest Price - This product is ineligible for additional discounts or rebates.

Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.

Weight

Buy this product and your entire order ships for free.

Some orders are inelligible for delivery discounts. See offer details for disqualifying products and destinations.