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Top 10June 2025

Best Road Bike Seat Post Carbon Fiber

We made a list of the top 10 Road Bike Seat Post Carbon Fiber based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

clhjinruoliu Full Carbon Fiber Bicycle Seatpost 350/400Mm Adjustable Offset Seatpost Mountain Bike Seat Post for MTB Road Bike BMX,White,27.2x350MM

clhjinruoliu Full Carbon Fiber Bicycle Seatpost 350/400Mm Adjustable Offset Seatpost Mountain Bike Seat Post for MTB Road Bike BMX,White,27.2x350MM

✓Material & Size: Full 3K high-strength carbon fiber, exquisite technics, nice touch feeling, Two bolt design offers easy fore-aft and infinite angle adjustment. Diameter: 27.2MM/30.8MM/31.6MM. Length: 350/400MM.
✓Suitable for: Both circular arch and oval cushion, you can adjust the screw of the seatpost to find the comfortable angle of Mountain bikes, Road bike, Downhill bike, Track bike, MTB, BMX, DH, etc.
✓Professional Design: The sturdy structure is not only beautiful, but also can make up for the shortcomings of the smaller frame and increase the maneuverability of riding.
✓How to Choose the Size: 1.Check the diameter of the original seatpost, choose the same size as the original diameter. 2.Measure the inside diameter of the frame tube.
✓Please Note: Diameter of the seat post is 27.2/30.8/31.6mm. Please choose the correct size; When installing, the diameter of the seat post must be the same as that of the bike frame.

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7% Discount

TPard Carbon Bike Seatpost 27.2/31.6 Ultralight Carbon Fiber Bicycle Seat Post Bike Seat Tube for Mountain Road Bikes MTB BMX

TPard Carbon Bike Seatpost 27.2/31.6 Ultralight Carbon Fiber Bicycle Seat Post Bike Seat Tube for Mountain Road Bikes MTB BMX

✓Ultralight Carbon Fiber: Made of full 3K T800 carbon fiber -- as known as "black gold" in the industry, Light weight, never rust.
✓Size: Φ27.2 × 350mm (apx. 220g/pc), Total length: 350mm, Tube Length: 325mm, Head Length: 25mm. Strength: maxium of 220lbs ; Setback: 0mm. Adjust tube length of 0 to 320mm.
✓How to Choose Yours: You need to either check your INTERNAL diameter or check the specs on your original seat tube or bike.
✓Adjustable Seat Angle: The seat angle is controlled by how the bolts are tensioned. You can probably get a pretty steep angle by loosing the rear bolt and tightening the front bolt. The recommended maximum torgue force would be 7 Nm, or else the cracks may occur.
✓Wide Application: Suitable for most mountain bikes, road bikes, fixed gear bicycle, downhill bikes, track bikes, MTB, BMX, DH, etc.

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Road Bike Seat Post Carbon Fiber Seatpost Bicycle Seat Posts Bicycle Parts Extended Cycling Seatpost 31.6*400mm 3K Glossy

Road Bike Seat Post Carbon Fiber Seatpost Bicycle Seat Posts Bicycle Parts Extended Cycling Seatpost 31.6*400mm 3K Glossy

✓1,Bicycle seatpost Material:carbon fiber;Appearance:3K Glossy;Weight:Approx 240g
✓2,Seatpost Diameter:27.2/30.8/31.6mm;length:350/400mm;
✓3,Easy to install and remove, Zero degree
✓4,Install the product correctly, please follow the specified tightening torque (4Nm)
✓5,We recommend using a hexagon wrench to tighten the screw.Tighten the screws. Since it is made of carbon, we recommend tightening the body to support it by tightening with your hands. Cracks can occur when strong tensions occur

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Joxvizx Bike Carbon SeatPost 27.2/31.6-400/350mm,Ultralight Carbon Fiber MTB Bicycle Seat Post,Adjustable Offset Cycling Seat Tube for Road Mountain Bike,Fixed Gear,BMX,3K Matte Black (27.2X350MM)

Joxvizx Bike Carbon SeatPost 27.2/31.6-400/350mm,Ultralight Carbon Fiber MTB Bicycle Seat Post,Adjustable Offset Cycling Seat Tube for Road Mountain Bike,Fixed Gear,BMX,3K Matte Black (27.2X350MM)

✓Ultralight Carbon Fiber: Made of carbon fiber, weighs only about 165g-210g, Lightweight and strong, which is strong and fine matt surface patterns, elegant appearance.
✓Suitable Seatpost Size: We consider more cycling enthusiasts needs, It has two length options: 350mm/400mm and 2 outer diameter sizes: 27.2/31.6mm.Offset: about 20mm, Please confirm the size of the seatpost your bike can use before you buy.
✓Easy installation: The bicycle seatpost is easy to install and disassemble, clear scale, accurately adjust the length of the seat tube. you only need to loosen the bolts of the old seat and remove the seatpost.Fit Saddle Rail: 7*7/7*9MM
✓Wide Application: Suitable for most bikes,such as mountain bikes, road bikes, fixed gear bikes, off-road bikes, downhill bikes, track bikes, MTB, BMX, DH, etc.
✓How to Choose the Size:1.Check the diameter of the original seatpost,choose the same size as the original diameter.2.Measure the inside diameter of the frame tube.
✓Angle Adjustable:Unique design, you can change the angle of the bicycle seat by adjusting the screw on the top of the seat tube, making your riding more comfortable

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Carbon SeatPost 27.2 350mm 3K Carbon Fiber Bike Seatpost Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Black)

Carbon SeatPost 27.2 350mm 3K Carbon Fiber Bike Seatpost Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Black)

✓3K Carbon Fiber: Constructed of ultra light and strong 3K Carbon Fiber. Light weight, never rust
✓Size: 27.2 × 350mm (apx 220g/pc), Total length: 350mm, Tube Length: 325mm, Head Length: 25mm. Strength: 4.9 levels ultra high strength, maxium of 580lbs ; Setback: 0mm. Adjust tube length of 0 to 320mm
✓How to Choose the Size:1.Check the diameter of the original seatpost,choose the same size as the original diameter.2.Measure the inside diameter of the frame tube.
✓With adjustable head, Easy to install. Frosting finish, exquisite workmanship, nice touch feeling
✓Suitable for most road bike, fixed gear bicycle, mountain bikes, downhill bike, track bike, MTB, BMX, DH, etc

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Carbon Fiber Road Bike Seatpost RXL SL Carbon Fiber Seatpost MTB Bike Seat Posts Carbon Seatposts 30.8 Downhill Mountain Bike Seat Post Black 3K Matte 30.8X350mm MTB Seatpost for Cycling

Carbon Fiber Road Bike Seatpost RXL SL Carbon Fiber Seatpost MTB Bike Seat Posts Carbon Seatposts 30.8 Downhill Mountain Bike Seat Post Black 3K Matte 30.8X350mm MTB Seatpost for Cycling

✓1. Diameter: 27.2/30.8/31.6mm; Length: 350/400mm; Suitable for road and mountain bikes; Appearane:3K Glossy/Matte;
✓2. Carbon Fiber: Constructed of ultra light and strong 3K Carbon Fiber. Light weight, never rust. Easy to install. Frosting finish, exquisite workmanship, nice touch feeling.
✓3. About Choose the Size:1.Choose Same size diameter With the original seatpost. 2.Choose the size according to the inside diameter of the frame tube
✓4. Carbon Fiber Compares to Aluminum Alloy: Lighter in weight. Much more beautiful in appearance. Brighter in Color. Stronger in pressure resistance. Anti-Shock. Has proper elasticity, improving your bicycle's class in minutes.
✓5. Install the Carbon Fiber Road Bike Seatpost correctly, please follow the specified tightening torque (4Nm). Since it is made of carbon, we recommend tightening the body to support it by tightening with your hands. Cracks can occur when strong tensions occur.

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27.2 Carbon Seatpost Road Bike Seat Post 27.2mm Bicycle Seatposts for Mountain Bike 350mm for Cycling 3K Glossy Offset Seat Posts for Road Bicycles (27.2x350mm)

27.2 Carbon Seatpost Road Bike Seat Post 27.2mm Bicycle Seatposts for Mountain Bike 350mm for Cycling 3K Glossy Offset Seat Posts for Road Bicycles (27.2x350mm)

✓1,Material:Carbon fiber;Appearance:3K Glossy;Weight:Approx 210+/-10g.
✓2,Diameter:27.2mm;length:350mm;Offset:25mm; About Choose the Size:1.Choose Same size diameter With the original seat post. 2.Choose the size according to the inside diameter of the frame tube.
✓3,Easy to install. Frosting finish, exquisite workmanship, nice touch feeling. Install the product correctly, please follow the specified tightening torque (4Nm).
✓4,Can used on both road and mountain bikes. Suitable for attachment to a saddle with a hole. If there is no hole in the saddle, we recommend using a hexagon wrench to tighten the screw.
✓5,Tighten the screws. Since it is made of carbon, we recommend tightening the body to support it by tightening with your hands. Cracks can occur when strong tensions occur.

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Carbon SeatPost 30.8 400mm Litetop 3K Carbon Fiber Bike Seatpost Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Black)

Carbon SeatPost 30.8 400mm Litetop 3K Carbon Fiber Bike Seatpost Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Black)

✓3K Carbon Fiber: Constructed of ultra light and strong 3K Carbon Fiber. Light weight, never rust
✓Size: 30.8 × 400mm (apx 240g/pc), Total length: 400mm, Tube Length: 375mm, Head Length: 25mm. Strength: 4.9 levels ultra high strength, maxium of 580lbs ; Setback: 0mm. Adjust tube length of 0 to 370mm
✓How to Choose the Size:1.Check the diameter of the original seatpost,choose the same size as the original diameter.2.Measure the inside diameter of the frame tube.
✓With adjustable head, Easy to install. Frosting finish, exquisite workmanship, nice touch feeling
✓Suitable for most road bike, fixed gear bicycle, mountain bikes, downhill bike, track bike, MTB, BMX, DH, etc

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7% Discount

Full Carbon Fiber Seatpost Light Mountain Road Bike MTB 27.2mm/31.6mm x350mm seatpost (Matte, 27.2mm)

Full Carbon Fiber Seatpost Light Mountain Road Bike MTB 27.2mm/31.6mm x350mm seatpost (Matte, 27.2mm)

✓Cycling bicycle MTB bike full Carbon fiber seatpost
✓power strength with light weight
✓The approx weight with 27.2/350mm length is about 171g
✓Material : made of qualified carbon fiber.

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FAST- DEER Carbon Fiber Seat Post MTB/Road Bicycle Seat Post 27.2/30.9/31.6×350/400mm Weight 160g (3K, 31.6X400)

FAST- DEER Carbon Fiber Seat Post MTB/Road Bicycle Seat Post 27.2/30.9/31.6×350/400mm Weight 160g (3K, 31.6X400)

✓1.Seat Post Structure——FAST- DEER seat post made from 100% unidirectional Carbon Fiber (Japan Toray T800), the seat post is lightweight and stiff in all the right places. This construction method means that there is no bonding, bladder materials or excess weight in the seat post, just uninterrupted carbon fibers. We can make a lighter seat post.
✓2.Carbon fiber base, Titanium screw——The clamping design passes through a carbon fiber base and titanium screws to protect the saddle rail and reduce weight.Compatible with 7mm round alloy rails and 8x8.5mm / 7x9mm / 7x10mm carbon fiber guides
✓3.Weight——The weight of 27.2x350mm is 135 +/- 8g. The weight of 31.6x350mm is 150 +/- 8g. We cannot guarantee that the weight of each seat post is 135g （Take 27.2x350mm size as an example）, but we promise that the weight difference will never exceed 8g
✓4.Size——We consider more cycling enthusiasts needs, Compatible with mainstream bicycle frames，Make your purchase choices easier. Length: 350/400mm Diameter: Ø31.6/30.8/27.2 mm.
✓5.Installation Note——We recommend that you place the seat post into the lower part of the frame 100mm and then tighten the seat tube clamp fixing bolts. Torque Spec：Seat post Collar Determined by your Frame manufacture/Seat post Collar（Recommended locking torque ≤ 5.1NM）
✓6.FAST-DEER Service——Within two months of your purchase of FAST-DEER products, any product quality problems occur. We will refund in full, and we will not take back damaged products.FAST-DEER will continue to strive for excellence and continue to be unique. Riding, never stop. FAST- DEER , never stop.

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