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25.4 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.

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All 72 products:

M-Wave SP-C1 Suspension Seatpost, 25.4mm, 315mm, Travel: 40mm, Black
M-Wave SP-C1 Suspension Seatpost, 25.4mm, 315mm, Travel: 40mm, Black

Preload adjustable 40mm travel Aluminum Item Specifications Clamp Type: Standard, single bolt Primary Color: Black Seat … read more

your price $29.99

BuyBuyPART NUM 814571
Kalloy Uno 602 Seatpost 25.4 x 350mm Black
Kalloy Uno 602 Seatpost 25.4 x 350mm Black

Item Specifications Length: 350 Clamp Style: Standard Rails Diameter: 25.4 Color: Black … read more

your price $19.99

BuyBuyPART NUM 431555
Sunlite Alloy Seatpost, 25.4, 350mm, Silver
Sunlite Alloy Seatpost, 25.4, 350mm, SilverSunlite

Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 25.4mm Length: 350mm Color: … read more

your price $19.99

BuyBuyPART NUM 836569
Pure Cycles Seat Post, 25.4mm x 350mm, Silver Seatpost
Pure Cycles Seat Post, 25.4mm x 350mm, Silver Seatpost

The Pure Cycles seatpost is a no frills no nonsense seatpost perfect for a basic replacement Clamp Size: 25.4mm Length: 350mm Color: Silver Material: … read more

your price $25.99

BuyBuyPART NUM 239655
FSA SL-K Carbon Post, (SB0) 25.4 X 350mm
FSA SL-K Carbon Post, (SB0) 25.4 X 350mmFull Speed Ahead

Carbon fiber mast bonded to 6061 aluminum clamp/head SB0: zero clamp offset, head is inline with post, and features a Minimal Top Clamp to … read more

your price $102.80 + ships free

BuyBuyPART NUM 490641
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, Silver
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, SilverSunlite

Adjustable pre-load design Coil spring provides plush suspension Micro adjust seat clamp Outer Diameter: 25.4mm Length: … read more

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

your price $32.99

BuyBuyPART NUM 114147
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, Black
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, BlackSunlite

Adjustable pre-load design Coil spring provides plush suspension Micro adjust seat clamp Outer Diameter: 25.4mm Length: … read more

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

your price $31.99

BuyBuyPART NUM 391465
Thomson Elite Seatpost Black 25.4 mm x 330 mm
Thomson Elite Seatpost Black 25.4 mm x 330 mmThomson

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

StarStarStarStarStar 4.6 of 5 ( 5 ) 4.6 of 5 stars average ( 5 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 283841
FSA SL-K Carbon Post, (SB20) 25.4 X 350mm SBS
FSA SL-K Carbon Post, (SB20) 25.4 X 350mm SBSFull Speed Ahead

Carbon fiber mast bonded to 6061 aluminum clamp/head SB20: 20mm clamp offset features an alloy two bolt Side-By-Side (SBS) head for added … read more

your price $102.80 + ships free

BuyBuyPART NUM 295613
Kalloy Uno 602 Seatpost 25.4 x 350mm Silver
Kalloy Uno 602 Seatpost 25.4 x 350mm Silver

Item Specifications Clamp Style: Standard Rails Color: Silver … read more

your price $18.99

BuyBuyPART NUM 914898
Zipp Speed Weaponry Service Course SL Seatpost, 0mm Setback, 25.4mm Diameter, 400mm Length, Matte Black, C2
Zipp Speed Weaponry Service Course SL Seatpost, 0mm Setback, 25.4mm Diameter, 400mm Length, Matte Black, C2

Matching Zipp Service Course SL bars and stems in both form and function. Dual bolt, low profile micro adjust cradle Machined internal shaft … read more

your price $172.00 + ships free

BuyBuyPART NUM 870373
Zipp Speed Weaponry Service Course SL Seatpost, 20mm Setback, 25.4mm Diameter, 400mm Length, Matte Black, C2
Zipp Speed Weaponry Service Course SL Seatpost, 20mm Setback, 25.4mm Diameter, 400mm Length, Matte Black, C2

Matching Zipp Service Course SL bars and stems in both form and function. Dual bolt, low profile micro adjust cradle Machined internal shaft … read more

your price $172.00 + ships free

BuyBuyPART NUM 492725
Sunlite Alloy Seatpost, 25.4, 350mm, Black
Sunlite Alloy Seatpost, 25.4, 350mm, BlackSunlite

Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 25.4mm Length: 350mm Color: … read more

your price $19.99

BuyBuyPART NUM 505282
Odyssey Pivotal Seat Post, Black, 25.4x300
Odyssey Pivotal Seat Post, Black, 25.4x300

Forged aluminum pivotal seat posts 25.4mm diameter Low profile pivotal base Laser etched monogram logo Item Specifications … read more

your price $38.99

BuyBuyPART NUM 943313
Zoom 25.4 x 300mm Black Straight Alloy Post
Zoom 25.4 x 300mm Black Straight Alloy Post

Zoom Seatposts Item Specifications Color: Black Length: 300mm Material: Aluminum Seatpost Diameter: 25.4mm Offset: 0mm Seatpost Type: Rigid … read more

your price $14.99

BuyBuyPART NUM 210195
M-Wave SP-C3 Seatpost, 25.4mm x 350mm, Silver
M-Wave SP-C3 Seatpost, 25.4mm x 350mm, Silver

25.4 x 350 mm alloy, silver Item Specifications Clamp Type: Standard, single bolt Primary Color: Silver Seat Post Diameter: 25.4mm … read more

your price $19.99

BuyBuyPART NUM 439205
Black Ops Alloy Anodized Seatpost, 25.4mm x 350mm, Black Seatpost
Black Ops Alloy Anodized Seatpost, 25.4mm x 350mm, Black Seatpost

Fully anodized clamp and post in a variety of colors Available in 2 sizes and 5 colors to match your style Clamp Size: 25.4mm Length: 350mm Color: … read more

StarStarStarStarStar 4 of 5 ( 1 ) 4 of 5 stars ( 1 review )

your price $35.98

BuyBuyPART NUM 270479
Black Ops Chromo Seatpost 25.4mm x 380mm
Black Ops Chromo Seatpost 25.4mm x 380mm

Chromoly construction Classic BMX design Outer Diameter: 25.4mm Length: 380mm Color: Black Material: Cro-Mo Weight: 335g … read more

your price $19.99

BuyBuyPART NUM 213353
Sunlite

"Every year bikes change, styles and trends evolve, old bikes are in need of repairs and new bikes are waiting for that personal touch. We provide the means to keep your bike on the road and fun to ride!"

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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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Thomson

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

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Eclat

"Simplicity is the hardest design principle to follow; It's at the heart of our approach to eclat."

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We The People

"W-T-P have always taken a lot of pride in ourselves and in building bikes that are capable of taking everything a rider throws at them. We are constantly at the forefront of developing and manufacturing materials that will with stand hard and furious riding and our designs are made to combat common breaks and bends."

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Tioga

"Whether getting faster requires lighter components, components to give you greater control, or something else, Tioga will keep tweaking and innovating to find it."

See all Tioga

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

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.

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

Suspension seatposts are designed with comfort in mind.

Seatpost Clamp Style

This is the part number or identifier for this item from the manufacturer

These products are one of our best sellers.

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

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

Limited quantities remaining.

Weight

Seatpost Material

Recently added to our product selection.

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

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

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.