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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Showing 88 products:
Thomson Elite Seatpost Black 25.4 mm x 330 mm
4.6 of 5
( 5 )
4.6 of 5 stars average
( 5 reviews )
BuyPART NUM 283841
Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any … read more
4.6 of 5
( 5 )
4.6 of 5 stars average
( 5 reviews )
In Store
Thomson SP-E150-BK
Ships Freeyour price $114.95 + ships free
BuyPART NUM 283841 
Zoom 25.4 x 300mm Silver Straight Alloy Post BuyPART NUM 999596
Zoom Seatposts Item Specifications Color: Silver Length: 300mm Material: Aluminum Seatpost Diameter: 25.4mm Offset: 0mm Seatpost Type: Rigid … read more
your price $9.99
BuyPART NUM 999596 
Sunlite Alloy Seatpost, 25.4, 350mm, Silver
BuyPART NUM 836569
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 25.4mm Length: 350mm Color: … read more
your price $19.99
BuyPART NUM 836569 
FSA SL-K Carbon Post, (SB0) 25.4 X 350mm
BuyPART NUM 490641
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
BuyPART NUM 490641 
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, Silver
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 114147
Adjustable pre-load design Coil spring provides plush suspension Micro adjust seat clamp Outer Diameter: 25.4mm Length: … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $32.99
BuyPART NUM 114147 
Sunlite Adjustable Suspension Seatpost, 25.4mm x 350mm, Black
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 391465
Adjustable pre-load design Coil spring provides plush suspension Micro adjust seat clamp Outer Diameter: 25.4mm Length: … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $31.99
BuyPART NUM 391465 
Kalloy Uno 602 Seatpost 25.4 x 350mm Black BuyPART NUM 431555
Item Specifications Length: 350 Clamp Style: Standard Rails Diameter: 25.4 Color: Black … read more
your price $19.99
BuyPART NUM 431555 
EVO E-Force AL Seatpost, Black, 25.4 x 400mm BuyPART NUM 980928
Alloy construction Length: 400 mm 20mm offset Easy single bolt seat angle adjustment Item Specifications Offset: 20mm … read more
your price $19.99
BuyPART NUM 980928 
Origin8 Pro-Fit Seatpost, 25.4 x 400mm, Silver BuyPART NUM 218549
Forged AL6061-T6 alloy construction Micro-adjust 2-bolt hinged clamp design Extra-long 400mm post 0mm setback Outer Diameter: … read more
13% offretail $34.39 your price $29.99
BuyPART NUM 218549 
Kalloy Uno 602 Seatpost 25.4 x 350mm Silver BuyPART NUM 914898
Item Specifications Clamp Style: Standard Rails Color: Silver … read more
your price $18.99
BuyPART NUM 914898 
EVO E-Force Zero Seatpost, 25.4 x 400mm, Black
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 729443
CNC 6061 aluminum construction No Offset 400mm length Precise seat angle adjustment with 2 Cr-Mo bolts Item Specifications … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $27.99
BuyPART NUM 729443 
Odyssey Pivotal Seat Post, Black, 25.4x300 BuyPART NUM 943313
Forged aluminum pivotal seat posts 25.4mm diameter Low profile pivotal base Laser etched monogram logo Item Specifications … read more
your price $38.99
BuyPART NUM 943313 
Sunlite Alloy Seatpost, 25.4, 350mm, Black BuyPART NUM 505282
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 25.4mm Length: 350mm Color: … read more
your price $19.99
BuyPART NUM 505282 
FSA SL-K Carbon Post, (SB20) 25.4 X 350mm SBS BuyPART NUM 295613
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
BuyPART NUM 295613 
Kalloy SP-200 Seatpost, 25.4 X 350mm Silver
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 665582
Straight post for saddles with built-in clamp Machined 2014 anodized aluminum Item Specifications diameter: 25.4mm length: 350mm … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $7.99
BuyPART NUM 665582 
Kalloy SP-265 UNO Seatpost, 20mm, 25.4 x 350mm, Sandblast Silver BuyPART NUM 203204
Heat treated 6061 sandblast aluminum (matte finish) 2D forged 1-bolt head 30mm rail clamping area 270g (27.2mm) Item Specifications … read more
your price $19.99
BuyPART NUM 203204 
Eclat Torch15 Pivotal Seat Post 230mm Black
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
BuyPART NUM 313044
15mm offset bolt position (lay back seat post) 6061-T6 3D forged alloy Pivotal system compatible seat post Star shape wall structure … read more
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
30% offretail $46.99 your price $32.89
BuyPART NUM 313044 
Black Ops Fluted Seatpost with Clamp, 25.4 x 350mm, Red BuyPART NUM 639307
Anodized silver clamp with an anodized and fluted grooved post Available in a variety of colors to match your style Outer Diameter: … read more
your price $26.99
BuyPART NUM 639307 
Zoom 25.4 x 300mm Black Straight Alloy Post BuyPART NUM 210195
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
BuyPART NUM 210195 
Thomson is leading with innovative design for two primary markets - aerospace and cycling.
"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!"
"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."
"Simplicity is the hardest design principle to follow; It's at the heart of our approach to eclat."
"Whether getting faster requires lighter components, components to give you greater control, or something else, Tioga will keep tweaking and innovating to find it."
"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."
We define color as the main color of the item. It may have accents or highlights in other colors.
Weight
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
Rigid seatposts are the most common type of seatpost with no suspension or dropping capability.
Seatpost Clamp Style
This is the part number or identifier for this item from the manufacturer
On a dropper post, this is the distance that the post will drop.
Our Lowest Price - This product is ineligible for additional discounts or rebates.
Suspension seatposts are designed with comfort in mind.
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.