30.9- mm Alloy 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 23 products:
KS LEV Post without Remote, 125mm, 30.9 x 385mm, Black 
BuyPART NUM 958477
External cable routing with adjustable rotational orientation (This feature is not the same as earlier generation LEV models Precision machined … read more
KS C221-125-30.9
Two remaining at this price
Ships Free$30 offretail $309.00 your price $278.10 + ships free
BuyPART NUM 958477 
KS ETEN Post without Remote, 75mm, 30.9 x 325mm, Black BuyPART NUM 215004
External cable routing Alloy mast Black hard anodized stanchion Forged head with 20mm offset Black laser etched seal collar … read more
$10 offretail $109.00 your price $98.10 + ships free
BuyPART NUM 215004 
Reverse Comp Seatpost, 30.9 x 350mm, Black BuyPART NUM 883082
6061 aluminum seatpost for all-around use Two bolt, micro-adjustable head. 325g (27.2mm) Item Specifications diameter: 30.9mm length: … read more
your price $33.99 + ships free
BuyPART NUM 883082 
Origin8 Spire II Seatpost, 30.9 x 350mm, 15mm, Black BuyPART NUM 319917
3D forged one-piece AL6061-T6 construction Wide saddle clamp design reduces rail stress and flex Micro-adjust 2 bolt clamp design … read more
15% offretail $53.99 your price $45.89 + ships free
BuyPART NUM 319917 
KS ETEN-I Post without Remote, 75mm, 30.9 x 330mm, Black BuyPART NUM 396366
Internal cable routing Alloy mast Black hard anodized stanchion Forged head with 20mm offset Black laser etched seal collar … read more
$11 offretail $119.00 your price $107.10 + ships free
BuyPART NUM 396366 
Thomson Elite 7000 Seatpost, 30.9 x 367mm, 16mm, Silver
BuyPART NUM 878739
Made in the U.S.A. Post and cradle are machined from 1- piece of 7000 series aluminum 41mm seat rail grip length 40% stronger … read more
your price $121.95 + ships free
BuyPART NUM 878739 
Sunlite Alloy Pillar Seatpost, 30.9, 350mm, Black, No Clamp
BuyPART NUM 879960
Forged alloy construction Pillar style design Outer Diameter: 30.9mm Length: 350mm Color: Black Material: Alloy … read more
your price $15.99
BuyPART NUM 879960 
KS LEV Integra Dropper Seatpost, 200mm, 30.9 x 520mm, Black BuyPART NUM 245393
Internal cable routing with rotating actuator and reduced actuation force Precision machined alloy mast One piece 3D forged stanchion … read more
$179 offretail $399.00 your price $219.84 + ships free
BuyPART NUM 245393 
KS LEV Integra A12 Post without Remote, 150mm, 30.9 x 430mm, Black BuyPART NUM 216639
Internal cable routing with rotating actuator and reduced actuation force Precision machined alloy mast One piece 3D forged stanchion … read more
$87 offretail $309.00 your price $222.00 + ships free
BuyPART NUM 216639 
Origin8 Spire I Seatpost, 30.9 x 350mm, 15mm, Black BuyPART NUM 348317
3D forged one-piece AL7050-T6 construction Wide saddle clamp design reduces rail stress and flex Micro-adjust 2 bolt clamp design … read more
15% offretail $75.99 your price $64.59 + ships free
BuyPART NUM 348317 
Origin8 Pro-Fit Seatpost, 30.9 x 400mm, Silver BuyPART NUM 908611
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 908611 
KS RAGE-I Post without Remote, 75mm, 30.9 x 292mm, Black BuyPART NUM 389721
Internal cable routing with polycarbonate cable connector Precision machined alloy mast with integrated seat collar Micro-adjustable … read more
$18 offretail $185.00 your price $166.50 + ships free
BuyPART NUM 389721 
KS Rage-i Dropper Seatpost - 30.9mm, 125mm, Black, Remote Not Included BuyPART NUM 133827
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
$18 offretail $185.00 your price $166.50 + ships free
BuyPART NUM 133827 
KS RAGE-I Dropper Post, 150mm, 30.9 x 442mm, Black BuyPART NUM 162849
Internal cable routing with polycarbonate cable connector Precision machined alloy mast with integrated seat collar Micro-adjustable … read more
$18 offretail $185.00 your price $166.50 + ships free
BuyPART NUM 162849 
KS E20 Dropper Seatpost - 30.9mm, 150mm, Black, Remote Not Included BuyPART NUM 554397
A true first. Patented and award-winning LEV zero-movement cable technology is now available at a truly affordable price point. Remote sold separately … read more
$15 offretail $159.00 your price $143.10 + ships free
BuyPART NUM 554397 
Crank Brothers Highline 7 Dropper Post, 170mm, 30.9 x 504mm, Black BuyPART NUM 591675
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
BuyPART NUM 591675 
KS LEV Post without Remote, 80mm, 30.9 x 295mm, Black 
Info
External cable routing with adjustable rotational orientation (This feature is not the same as earlier generation LEV models Precision machined … read more
$30 offretail $309.00 your price $278.10 + ships free
Info 
Tranz-X Kitsuma LT Dropper Post, 170mm, 30.9 x 494mm, Black Info
Internal cable routing Low maintenance sealed hydraulic cartridge and coil spring 7075 alloy construction and hard anodized 26mm stanchion … read more
$31 offretail $159.00 your price $127.20 + ships free
Info 
Gusset MTB Pivotal Seatpost, 30.9 x 330mm, Black Info
A strong, lightweight alloy post, licensed from Pivotal BMX Inc Allows seat to be dropped lower than conventional posts 3D forged 7075 … read more
11% offretail $27.95 your price $25.00
Info 
KS E20 Post without Remote, 125mm, 30.9 x 425mm, Black Info
External cable routing Precision machined alloy mast Micro-adjustable head Air sprung hydraulic steel cartridge Patented … read more
$18 offretail $185.00 your price $166.50 + ships free
Info 
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 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.
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
This is the part number or identifier for this item from the manufacturer
Limited quantities remaining.
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.
Weight
Buy this product and your entire order ships for free.
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