MenuMenuModern Bike

Black 18+ mm Bicycle Seatposts

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

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

SortSort

Showing 160 products:

Interloc Racing Design Wayback Seatpost, 27.2 x 300mm, Silver
Interloc Racing Design Wayback Seatpost, 27.2 x 300mm, Silver

The solution to common fit problems, 50mm of setback allows for proper fit Aluminum head with Tange Prestige CrMo shaft Item Specifications … read more

your price $119.95 + ships free

BuyBuyPART NUM 692815
Vision Metron CAB SB32 Seatpost, 31.6 x 350mm
Vision Metron CAB SB32 Seatpost, 31.6 x 350mm

One piece continuous carbon fiber construction Box-section carbon head Forged alloy minimalist clamps Dual M6 chromoly hardware 32mm Setback … read more

$28 offretail $252.60 your price $223.99 + ships free

BuyBuyPART NUM 486574
Ritchey Comp Carbon Seatpost: 31.6, 400mm, 25mm Offset Black, 2020 Model
Ritchey Comp Carbon Seatpost: 31.6, 400mm, 25mm Offset Black, 2020 ModelRitchey

Carbon seatpost with a proven low profile 2 bolt clamp that wont bottom out on the saddle. Low profile clamp reduces stress on lightweight rails … read more

your price $104.95 + ships free

BuyBuyPART NUM 863183
KS ETEN Lever Post 125mm drop, 31.6x445mm
KS ETEN Lever Post 125mm drop, 31.6x445mm

Lever operated 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

BuyBuyPART NUM 349222
Ritchey Comp Carbon Seatpost: 27.2, 350mm, 25mm Offset Black, 2020 Model
Ritchey Comp Carbon Seatpost: 27.2, 350mm, 25mm Offset Black, 2020 ModelRitchey

Carbon seatpost with a proven low profile 2 bolt clamp that wont bottom out on the saddle. Low profile clamp reduces stress on lightweight rails … read more

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

your price $104.95 + ships free

BuyBuyPART NUM 171720
KS eTEN Dropper Seatpost - 27.2mm, 100mm, Black
KS eTEN Dropper Seatpost - 27.2mm, 100mm, BlackKind Shock

KS eTen Height-Adjust Seatposts Single-bolt alloy head Black hard anodized stanchion and an air spring, hydraulically locked cartridge … read more

StarStarStarStarStar 4.7 of 5 ( 3 ) 4.7 of 5 stars average ( 3 reviews )

$11 offretail $119.00 your price $107.10 + ships free

BuyBuyPART NUM 520737
Paul Component Engineering Tall and Handsome Seatpost 27.2mm Black
Paul Component Engineering Tall and Handsome Seatpost 27.2mm Black

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

$15 offretail $205.00 your price $189.99 + ships free

BuyBuyPART NUM 897791
Ergon CF Allroad Pro Set Back Carbon Post 27.2 x 400mm
Ergon CF Allroad Pro Set Back Carbon Post 27.2 x 400mm

Highly-tuned and flexible carbon fiber composite leaf spring design reeduces road shock and absorbs vibration The defined flex allow a maximum of 20mm … read more

your price $299.95 + ships free

BuyBuyPART NUM 818159
Velo Orange Grand Cru Long Setback Seatpost MKII: 30.2mm Setback, 27.2mm, 300mm, Black
Velo Orange Grand Cru Long Setback Seatpost MKII: 30.2mm Setback, 27.2mm, 300mm, Black

Generous offset/setback can be important for leather or other saddles that have short rails Head is integral with the post - not pressed … read more

StarStarStarStarStar 3 of 5 ( 1 ) 3 of 5 stars ( 1 review )

your price $62.00 + ships free

BuyBuyPART NUM 406396
FSA K-Force Light Carbon Seatpost, 27.2 x 350mm, 25mm, Black, Di2 with Plastic Sleeve
FSA K-Force Light Carbon Seatpost, 27.2 x 350mm, 25mm, Black, Di2 with Plastic SleeveFull Speed Ahead

One piece continuous carbon fiber construction Forged alloy Minimal Top Clamp (MTC) Fit 7mm standard rails and 7x9mm oval rails … read more

your price $216.20 + ships free

BuyBuyPART NUM 998483
Ritchey WCS Carbon 1-Bolt Seatpost: 27.2, 350mm, 25mm Offset, Black
Ritchey WCS Carbon 1-Bolt Seatpost: 27.2, 350mm, 25mm Offset, BlackRitchey

Ritchey WCS Carbon One-bolt. Head uses less aluminum than other designs, resulting in reduced weight. Design allows adjustments to be made with … read more

your price $259.95 + ships free

BuyBuyPART NUM 266949
Salsa Guide Carbon Seatpost 27.2 x 350mm 18mm Offset Black
Salsa Guide Carbon Seatpost 27.2 x 350mm 18mm Offset BlackSalsa

The Guide Carbon Seatpost features a highly adjustable two-bolt head design, while remaining lightweight, durable, and supportive when you need it most. … read more

your price $104.00 + ships free

BuyBuyPART NUM 656344
Redshift Dual-Position Seatpost: Aluminum 27.2x350 Black
Redshift Dual-Position Seatpost: Aluminum 27.2x350 Black

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

BuyBuyPART NUM 833144
Whisky 7 Seatpost 27.2x400mm 18mm Offset Matte Carbon
Whisky 7 Seatpost 27.2x400mm 18mm Offset Matte CarbonWhisky Parts Co.

The No.7 seatposts are made from the highest quality materials to be durable, lightweight and comfortable. Whether you're remounting during the cross … read more

your price $105.00 + ships free

BuyBuyPART NUM 768303
Salsa Guide Carbon Seatpost 27.2 x 400mm 18mm Offset Black
Salsa Guide Carbon Seatpost 27.2 x 400mm 18mm Offset BlackSalsa

The Guide Carbon Seatpost features a highly adjustable two-bolt head design, while remaining lightweight, durable, and supportive when you need it most. … read more

your price $104.00 + ships free

BuyBuyPART NUM 155955
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
Soma Layback Seatpost, 27.2 x 350mm - Black
Soma Layback Seatpost, 27.2 x 350mm - Black

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

BuyBuyPART NUM 447938
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
Kalloy SP-265 UNO Seatpost, 26.6 x 350mm, Sandblast Black
Kalloy SP-265 UNO Seatpost, 26.6 x 350mm, Sandblast Black

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

BuyBuyPART NUM 899366
Zipp Service Course Seatpost, 27.2 x 350mm, 20mm, Black
Zipp Service Course Seatpost, 27.2 x 350mm, 20mm, Black

Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications Offset: 20mm … read more

your price $56.00

BuyBuyPART NUM 910474
Ritchey

"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.'

See all Ritchey

Kind Shock

Kind Shock is an industry leader in suspension and dropper seat posts.

See all Kind Shock

Full Speed Ahead

"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."

See all Full Speed Ahead

Salsa

"At Salsa, we believe a sense of adventure makes life better. The bicycle can be so much more than just a bike; it's a path to new places, new people, and amazing experiences."

See all Salsa

Whisky Parts Co.

"Whisky Parts Co. makes high quality carbon components designed with unique features that help you do more with your bike and stand out from the rest. We believe that our work can help every rider find a new level of confidence and performance with our sturdy and lightweight forks, bars, rims and more. So whether you are building a new bike or upgrading one you already have, you'll find an uncommon attention to detail in every product we offer."

See all Whisky Parts Co.

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!"

See all Sunlite

Dimension

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.

See all Dimension

Answer

Answer BMX makes BMX racing components.

See all Answer

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.

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.

Seatpost Clamp Style

Weight

Seatpost Material

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

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.

These products are one of our best sellers.

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.