MenuMenuModern Bike

30.9- mm 504+ 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.

SortSort

Showing 13 products:

KS Rage-i Dropper Seatpost - 30.9mm, 190mm, Black
KS Rage-i Dropper Seatpost - 30.9mm, 190mm, Black

Rage-i is dropper performance at a never-before-seen value. Being our KS's entry-priced offering, Rage-i leaves nothing to compromise. Rage-i features … read more

$17 offretail $179.00 your price $161.10 + ships free

BuyBuyPART NUM 649029
KS LEV Integra Dropper Seatpost, 200mm, 30.9 x 520mm, Black
KS LEV Integra Dropper Seatpost, 200mm, 30.9 x 520mm, Black

Internal cable routing with rotating actuator and reduced actuation force Precision machined alloy mast One piece 3D forged stanchion … read more

$39 offretail $399.00 your price $359.10 + ships free

BuyBuyPART NUM 245393
KS LEV Integra Dropper Seatpost - 30.9mm, 200mm, Black, Remote Not Included
KS LEV Integra Dropper Seatpost - 30.9mm, 200mm, Black, Remote Not Included

Using the proven Lev design, the Integra takes advantage of internal routing to provide a clean aesthetic on modern mountain bikes. Next level of integration … read more

$35 offretail $359.00 your price $323.10 + ships free

BuyBuyPART NUM 988399
Crank Brothers Highline 7 Dropper Post, 170mm, 30.9 x 504mm, Black
Crank Brothers Highline 7 Dropper Post, 170mm, 30.9 x 504mm, Black

Premium alloy quill with additional machining for lighter weight; alloy mast Zero setback head, two-bolt fore/aft/tilt adjustment IFP … read more

your price $299.99 + ships free

BuyBuyPART NUM 591675
Crank Brothers Highline 3 Dropper Seatpost - 30.9, 170mm, Black
Crank Brothers Highline 3 Dropper Seatpost - 30.9, 170mm, Black

The all-new Highline delivers infinite adjustment, smooth feel, and easy installation for any bike. Remote sold separately. Shorter insertion … read more

$19 offretail $199.00 your price $179.10 + ships free

BuyBuyPART NUM 671594
Crank Brothers Highline 11 Dropper Post 170 30.9 x 507mm - Black
Crank Brothers Highline 11 Dropper Post 170 30.9 x 507mm - Black

Carbon quill and alloy mast Zero setback carbon head with titanium bolts; , two-bolt fore/aft/tilt adjustme IFP cartridge for smoother actuation and … read more

your price $399.99 + ships free

BuyBuyPART NUM 536595
SDG Tellis Dropper Seatpost 200mm 30.9x535mm w/1x Lever
SDG Tellis Dropper Seatpost 200mm 30.9x535mm w/1x Lever

Features Trelleborg seals for increased sealing capacity to keep the grease in and everything else out Updated IGUS Bushing decreases stiction … read more

$54 offretail $269.99 your price $215.99 + ships free

BuyBuyPART NUM 745485
RockShox Reverb Stealth Dropper Seatpost - 30.9mm, 200mm, Black, 1x Remote, C1
RockShox Reverb Stealth Dropper Seatpost - 30.9mm, 200mm, Black, 1x Remote, C1RockShox

The Reverb C1 Stealth offers new travel options and an overall shorter post length allowing more riders to benefit from longer travel options. Our new … read more

$72 offretail $429.00 your price $356.99 + ships free

BuyBuyPART NUM 914596
OneUp Components V3 Dropper Post, (240mm) 30.9 X 595mm
OneUp Components V3 Dropper Post, (240mm) 30.9 X 595mm

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 749395
OneUp Components V3 Dropper Post, (210mm) 30.9 X 530mm
OneUp Components V3 Dropper Post, (210mm) 30.9 X 530mm

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 605264
Turnon Components Bunker Dropper Seatpost, No Remote (190) 30.9x513mm
Turnon Components Bunker Dropper Seatpost, No Remote (190) 30.9x513mm

Features a double air chamber design and high-performance wiper seals to create a water and dustproof system Provides a subtle amount of … read more

your price $289.00 + ships free

BuyBuyPART NUM 341896
Tranz-X Kitsuma Air Dropper Post, 200mm, 30.9 x 558mm, Black
Tranz-X Kitsuma Air Dropper Post, 200mm, 30.9 x 558mm, Black

Internal Routing Lightweight alloy air cartridge adds rebound adjustment 7075 aluminum construction Upgraded internal bushings … read more

Currently Sold Out

your price $159.00 + ships free

InfoInfo
U.S.E. Ultimate HELIX 2.0 Dropper Post, 165mm 30.9 x 520mm
U.S.E. Ultimate HELIX 2.0 Dropper Post, 165mm 30.9 x 520mm

Helix design is fundamentally mechanical avoiding issues that plague other designs associated with air and oil pressure Machined 7075 alloy … read more

Currently Sold Out

your price $391.00 + ships free

InfoInfo
RockShox

"An icon in the mountain bike industry."

See all RockShox

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

Weight

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.

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

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

Seatpost Clamp Style

Seatpost Material

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

Suspension seatposts are designed with comfort in mind.

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.