Alloy 350+ mm Bicycle Seatposts
Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.
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 134 products:
KS LEV 272 Integra A12 Dropper Seatpost, 100mm, 27.2 x 410mm, Black 
BuyPART NUM 612074
Internal cable routing with rotating actuator and reduced actuation force Precision machined alloy mast One piece 3D forged stanchion … read more
In Store
Ships Free$30 offretail $309.00 your price $278.10 + ships free
BuyPART NUM 612074 
KS E20 Dropper Seatpost, 100mm, 31.6 x 370mm, Black BuyPART NUM 509729
External cable routing Precision machined alloy mast Micro-adjustable head Air sprung hydraulic steel cartridge Patented … read more
$16 offretail $169.00 your price $152.10 + ships free
BuyPART NUM 509729 
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 
Origin8 Pro-Fit Seatpost, 26.4 x 400mm, Black BuyPART NUM 903687
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 903687 
Tranz-X Skyline Dropper Seatpost, 125mm, 30.9 x 410mm, Black BuyPART NUM 709306
Internal routing Sealed hydraulic cartridge 6061 construction Item Specifications travel/drop: 125mm diameter: … read more
your price $119.00 + ships free
BuyPART NUM 709306 
Ritchey Classic Zero Seatpost - 27.2mm, 350mm, High Polish Silver
BuyPART NUM 461258
Proven 2-bolt design provides a balance between strength, weight and adjustability. Bolts are oriented to the axis of the rails for greatest contact area … read more
your price $69.95 + ships free
BuyPART NUM 461258 
Tranz-X Kitsuma LT Dropper Post 170mm, 31.6 x 494mm, Black BuyPART NUM 167505
External cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
your price $159.00 + ships free
BuyPART NUM 167505 
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 )
popularyour 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 SP-265 UNO Seatpost, 26.6 x 350mm, Sandblast Black BuyPART NUM 899366
Heat treated 6061 sandblast aluminum (matte finish) 2D forged 1-bolt head 30mm rail clamping area Item Specifications diameter: … read more
your price $19.99
BuyPART NUM 899366 
Tranz-X Skyline Dropper Seatpost, 125mm, 31.6 x 410mm, Black BuyPART NUM 574580
Internal routing Sealed hydraulic cartridge 6061 construction Item Specifications travel/drop: 125mm diameter: … read more
your price $119.00 + ships free
BuyPART NUM 574580 
Tranz-X Kitsuma LT Dropper Seatpost, 170mm, 31.6 x 494mm, Black BuyPART NUM 421401
Internal cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
your price $159.00 + ships free
BuyPART NUM 421401 
Tranz-X Kitsuma LT Dropper Post, 150mm, 30.9 x 464mm, Black 
Info
External cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
your price $159.00 + ships free
Info 
SR Suntour NCX Suspension Post, 31.6mm x 350mm, Black BuyPART NUM 209401
Brass bushing parallelogram suspension system 50mm travel Internal coil w/ preload adjustment Outer Diameter: 31.6mm Length: … read more
your price $151.99 + ships free
BuyPART NUM 209401 
Tranz-X Kitsuma Air Dropper Post, 150mm, 31.6 x 455mm, Black Info
Internal Routing Lightweight alloy air cartridge adds rebound adjustment 7075 aluminum construction Upgraded internal bushings … read more
$17 offretail $185.00 your price $168.00 + ships free
Info 
Origin8 Pro-Fit Seatpost, 26.8 x 400mm, Black BuyPART NUM 468735
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 468735 
Tranz-X Kitsuma LT Dropper Post, 170mm, 30.9 x 494mm, Black BuyPART NUM 745080
Internal cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
your price $159.00 + ships free
BuyPART NUM 745080 
Tranz-X Kitsuma LT Dropper Post, 170mm, 30.9 x 494mm, Black BuyPART NUM 966434
External cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
your price $159.00 + ships free
BuyPART NUM 966434 
Origin8 Pro Fit Seatpost, 27.0 x 400mm, Silver BuyPART NUM 862261
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 862261 
Origin8 Pro-Fit Seatpost, 27.2 x 400mm, Black BuyPART NUM 824552
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 824552 
"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."
Thomson is leading with innovative design for two primary markets - aerospace and cycling.
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.
Seatpost Material
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
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.
Our Lowest Price - This product is ineligible for additional discounts or rebates.
These products are one of our best sellers.
Suspension seatposts are designed with comfort in mind.
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.