Aluminum 20+ mm Bicycle Seatposts
Offset is often referred to as setback. This is the distance in mm that the clamp is offset from the center of the seatpost.
Contact Modern Bike via email, telephone, or showroom visit.
learn more
You may check the order status of a recent purchase to learn if it has been delayed, when it may ship, or if it has already been shipped.
check order status
Your Shopping Cart contains 0 products. View your cart to change product quantities, apply deal codes, or checkout.
Sort
Showing 105 products:
Ritchey Classic 2-Bolt Post, 27.2 x 350mm, Silver
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
BuyPART NUM 644997
3D forged 2014 aluminum shaft, 2-bolt adjustable 2014 aluminum head 38mm rail clamping area. 245g (27.2x350mm) Item Specifications … read more
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
popular
In Storeyour price $69.95
BuyPART NUM 644997 
Sunlite Alloy Seatpost, 25.8, 350mm, Silver
BuyPART NUM 876907
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 25.8mm Length: 350mm Color: … read more
15% offretail $19.99 your price $16.99
BuyPART NUM 876907 
Paul Component Engineering Tall and Handsome Seatpost 27.2mm Black BuyPART NUM 897791
Our new Tall & Handsome isn't the lightest seat post ever made, but we think it may be among the easiest to use and nicest looking. Like all PAUL components … read more
Lowest Price
Ships Free$15 offretail $205.00 your price $189.99 + ships free
BuyPART NUM 897791 
Paul Tall & Handsome Seatpost 27.2mm Polished
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
BuyPART NUM 584606
Paul Component Engineering Seatposts Item Specifications Color: Silver Weight: 320g Length: 360mm Material: Aluminum Seatpost Diameter: 27.2mm … read more
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
$25 offretail $225.00 your price $200.00 + ships free
BuyPART NUM 584606 
Nitto Dynamic Forged aluminum 27.2 x 300 Seatpost
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 396504
Nitto Dynamic S83 forged double-bolt seatposts Item Specifications Color: Silver Weight: 300g Length: 300mm Material: 2014 Aluminum Seatpost Diameter: … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $99.99
BuyPART NUM 396504 
Paul Component Engineering Tall and Handsome Seatpost 27.2mm Silver BuyPART NUM 314933
Our new Tall & Handsome isn't the lightest seat post ever made, but we think it may be among the easiest to use and nicest looking. Like all PAUL components … read more
your price $180.00 + ships free
BuyPART NUM 314933 
Redshift Dual-Position Seatpost: Aluminum 27.2x350 Black BuyPART NUM 833144
A seatpost that pivots at the top changing from a 16mm rearward offset to a 34mm forward offset. Linkage design maintains constant saddle-to-pedal … read more
your price $199.99 + ships free
BuyPART NUM 833144 
Soma Layback Seatpost, 27.2 x 350mm - Silver BuyPART NUM 669997
Strong and simple precision-forged aluminum seatpost One-bolt clamp design allows for a wide range of saddle angles with infinite intermediate … read more
your price $39.99
BuyPART NUM 669997 
Soma Layback Seatpost, 27.2 x 350mm - Black BuyPART NUM 447938
Strong and simple precision-forged aluminum seatpost One-bolt clamp design allows for a wide range of saddle angles with infinite intermediate … read more
5% offretail $39.99 your price $37.99
BuyPART NUM 447938 
Zipp Service Course Seatpost, 27.2 x 350mm, 20mm, Black BuyPART NUM 910474
Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications Offset: 20mm … read more
your price $56.00
BuyPART NUM 910474 
Kalloy SP-265 UNO Seatpost, 26.6 x 350mm, Sandblast Silver BuyPART NUM 340282
Heat treated 6061 sandblast aluminum (matte finish) 2D forged 1-bolt head 30mm rail clamping area 270g Item Specifications … read more
your price $19.99
BuyPART NUM 340282 
Zipp Service Course Seatpost, 27.2 x 350mm, 20mm, Silver BuyPART NUM 289291
Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications … read more
your price $56.00
BuyPART NUM 289291 
Sunlite Alloy Seatpost, 26.6, 350mm, Silver
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 645224
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 26.6mm Length: 350mm Color: … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $19.99
BuyPART NUM 645224 
Sunlite Alloy Seatpost, 26.2, 350mm, Silver
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 325834
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 26.2mm Length: 350mm Color: … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $19.99
BuyPART NUM 325834 
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 
Ritchey WCS Link Seatpost 27.2, 350mm, 20mm Offset, Black BuyPART NUM 244052
WCS Link features 20mm of offset and a reversible clamp which allows for an additional 10mm of fore-aft saddle adjustment. Item Specifications Color: … read more
your price $99.95 + ships free
BuyPART NUM 244052 
Soma Layback Seatpost, 27.2 x 400mm - Black
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 850691
Strong and simple precision-forged aluminum seatpost One-bolt clamp design allows for a wide range of saddle angles with infinite intermediate … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $39.99
BuyPART NUM 850691 
Promax SP-1 Seatpost - 27.2 x 400mm, Silver BuyPART NUM 673540
The SP-1 seatpost is made using lightweight, 2014, aluminum alloy tubing and a cold forged, aluminum, alloy head. The two-bolt head design ensures solid … read more
your price $39.99
BuyPART NUM 673540 
Promax SP-1 Seatpost - 27.2 x 400mm, Black BuyPART NUM 741316
The SP-1 seatpost is made using lightweight, 2014, aluminum alloy tubing and a cold forged, aluminum, alloy head. The two-bolt head design ensures solid … read more
your price $39.99
BuyPART NUM 741316 
Sunlite Alloy Seatpost, 26, 350mm, Silver BuyPART NUM 429483
Forged alloy construction Integrated index adjust seat clamp Weight: 325g Outer Diameter: 26.0mm Length: 350mm Color: … read more
your price $19.99
BuyPART NUM 429483 
"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.'
"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."
Dimension makes quality components to repair or custom-fit the vast majority of bikes being ridden today, and provide the accessories that make them fun to ride.
We define color as the main color of the item. It may have accents or highlights in other colors.
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
Rigid seatposts are the most common type of seatpost with no suspension or dropping capability.
Seatpost Clamp Style
Our Lowest Price - This product is ineligible for additional discounts or rebates.
Weight
On a dropper post, this is the distance that the post will drop.
Suspension seatposts are designed with comfort in mind.
Offset is often referred to as setback. This is the distance in mm that the clamp is offset from the center of the seatpost.
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.