Top 10 Best bicycle seatpost clamps in 2026

Last Updated - 7/1/2026

🏆Best Choice

PLATT

PLATT Bike Seat Post Clamp Aluminium Alloy Bicycle Quick Release Seatpost Collar 28.6mm / 31.8mm /34.9mm

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•PLATT Bicycle Quick Release seatclamp is a durable and lightweight alternative to add some beautiful color to your ride, and makes adjusting seatpost height a breeze.
•Hollow design, lightweight, Only about 39g (34.9 Clamp)
•Comes anodized in Black, Blue, Gold,Red and Silver,colorfast surface,great anti-corrosion
•28.6 clamp suits for Frame Seat tube 27.8mm-28.8mm
•31.8mm clamp suits for Frame Seat Tube 30.2mm-32.1mm
•34.9mm clamp suits for Frame Seat Tube 33.5mm-35.2mm.
•NOTE: TYPICALLY USED WITH 25.4/27.2/31.8 SEAT POST. HOWEVER, SEAT TUBE WALL THICKNESS VARIES. BE SURE TO MEASURE THE ACTUAL SEAT TUBE O.D. OF YOUR FRAME.

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$8.99

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PLATT

PLATT Bike Seat Post Clamp Aluminium Alloy Bicycle Quick Release Seatpost Collar 28.6mm / 31.8mm /34.9mm

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•PLATT Bicycle Quick Release seatclamp is a durable and lightweight alternative to add some beautiful color to your ride, and makes adjusting seatpost height a breeze.
•Hollow design, lightweight, Only about 39g (34.9 Clamp)
•Comes anodized in Black, Blue, Gold,Red and Silver,colorfast surface,great anti-corrosion
•28.6 clamp suits for Frame Seat tube 27.8mm-28.8mm
•31.8mm clamp suits for Frame Seat Tube 30.2mm-32.1mm
•34.9mm clamp suits for Frame Seat Tube 33.5mm-35.2mm.
•NOTE: TYPICALLY USED WITH 25.4/27.2/31.8 SEAT POST. HOWEVER, SEAT TUBE WALL THICKNESS VARIES. BE SURE TO MEASURE THE ACTUAL SEAT TUBE O.D. OF YOUR FRAME.

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$8.99

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TRIWONDER

TRIWONDER Bicycle Seat Post Clamp 31.8mm 34.9mm Aluminum Alloy Seat Tube Clip Bike Quick Release Clamp (Black - 31.8mm)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•✅【MATERIAL】The bicycle seatpost clamp is made of high-quality aluminum alloy, with a smooth and exquisite appearance, anti-wear and practical
•✅【28.6 CLAMP】28.6mm Bicycle Quick Release seat clamp is suitable for 27.2mm bicycle seatposts
•✅【34.9 CLAMP】34.9mm Bicycle seatpost clamp is suitable for 30.8 / 31.6mm bicycle seatposts
•✅【INSTALLATION】Simply secure with a 4mm Allen (hex) head key, the seat post clamp fits for most aluminum frame bikes, like mountain bike, road bike, etc
•✅【NOTE】This bicycle seatpost clamp should match the diameter of the seat tube on your frame and not the diameter of the seatpost itself

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$5.99

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Wolf Tooth

Wolf Tooth Precision-Machined Seatpost Clamp

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•The seatpost clamp should match the diameter of the seat tube on your frame and not the diameter of the seatpost itself.
•The M5 bolt includes spherical washer and mates with a cylindrical anchor barrel. This means that threads are always perfectly aligned, preventing binding and ensuring consistent clamping force.
•Lightweight 6061 T6 aluminum, M5 stainless steel bolt with integrated washer
•Tool interface: 4mm hex key
•CNC Machined in Minneapolis, MN

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$25.95

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Azarxis

Azarxis Bike Seat Post Clamp Aluminum Alloy Quick Release Bicycle Seatpost Tube Tightener Clip 28.6mm, 31.8mm, 34.9mm for Mountain, Road, Fixie, Track, Folding, DH, MTB, BMX Bikes Gear (Black, 31.8mm)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•🚴‍♂️ MEASUREMENT METHODS: The seatpost clamp should match the diameter of the seat tube on the frame, not the diameter of the seatpost itself
•🚴‍♂️ HIGH QUALITY: Lightweight 6061 T6 aluminum alloy, carbon steel screws, high strength
•🚴‍♂️ EASY TO INSTALL: Simply secure with a 4mm Allen head key
•🚴‍♂️ PERFECT SIZE: 💡 25.4mm Seat Post Clamp fits on the out diameter 22.2mm bike seat post 💡 28.6mm Seat Post Clamp fits on the out diameter 25.4mm bike seat post 💡 31.8mm Seat Post Clamp fits on the out diameter 27.2mm and 28.6mm bike seat post 💡 34.9mm Seat Post Clamp fits on the out diameter 30.4mm 30.8mm 31.6mm bike seat post
•🚴‍♂️ NOTE: BE SURE TO MEASURE THE ACTUAL SEAT TUBE OUTSIDE DIAMETER OF YOUR FRAME

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$5.99

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ROCKBROS

ROCKBROS Bike Seat Post Clamp 31.8/34.9mm Aluminum Tube Quick Release for 27.2-28.6mm/30.4-31.8mm Mountain Road Seat Tube Clip

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•【31.8/34.9mm Caliber】The 38.1mm bike seat post clamp is suitable for 27.2/28.6mm bike seat post and the 34.9mm clamp is suitable for 30.4/30.8/30.9/31.6mm bike seat post.
•【High-strength Aluminum Alloy】ROCKBROS bike seat clamp is made of high strength 6061 aluminum alloy. Make the bike clamp more sturdy and durable.
•【Rust and Corrosion Resistance】The bicycle seat post clamp adopts oxidation process. Corrosion resistant, less prone to rusting and be able to stand wear and tear.
•【Easy to Install】The bike tube clamp is available in quick-release and locked styles.The quick release seat post clamp requires no tools and is easy to install and disassemble.
•【Hollow & Lightweight】The application of hollow design gives the seat tube clip a lightweight feature.Will not add weight to bicycles, making it easy for you to ride.

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$7.99

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CUNCUI

CUNCUI 2pcs Bike Seat Clamps 31.8mm, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black)

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•【High quality material】Our bicycle seat clamp is made of 6061 aluminum, light and durable, comfortable and safe.
•【Widely used】Suitable for indoor and outdoor use, mountain bike, indoor bike, trail bike can be used, please confirm before ordering this bicycle seat clamp can be installed on your bike seat.
•【Easy to install 】Low-cost solution, let you sit more comfortable, let you ride more smoothly, have a good mood.
•【Compatible with multiple sizes】The inside diameter of the seat clamp is 31.8mm, suitable for 27.2/28.6mm sitting pipe diameter
•【Unique design】Bike clips are quick-release lock design, quick disassembly, making riding more comfortable, stable and safe.

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$6.49

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corki

Corki Cycles 31.8MM Quick Release Bicycle Seatpost Clamp, Sandblasting Anodised Aluminum Alloy Black KC89

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Ergonomic design,Extended lever, more efficient and comfortable qr seatpost clamp .
•Hollow design ,Retain strength,and keep it lightweight approx 40g.
•Aluminium alloy bike seat clamp,Sandblasting anodizing surface.
•31.8mm Bike Seat post clamp apply for out diameter 30.2mm to 32.1mm bicycle frame seat post.
•34.9mm Bicycle Seat post clamp suit for out diameter 33.5mm to 35.2mm bike frame seat tube .

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$9.99

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Bonsicoky

Bonsicoky Bike Seat Post Quick Release Pin, M6x65mm Bike Seat Clamp Quick Release Seatpost Binder Clamp Bolt, Red

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•❤High Strength Aluminium Alloy Construction: Made from high-strength aluminium alloy material, our Seat Post Quick Release Pin is built to last. Its sturdy construction ensures a secure and reliable grip on your seat post, providing peace of mind while cycling.
•❤Quick and Easy Seat Height Adjustment: Our Seat Post Quick Release Pin features a quick-release design that allows you to adjust your bike seat height quickly and easily. No tools are required, making it convenient for on-the-go adjustments during your rides.
•❤Secure and Reliable: Our Seat Post Quick Release Pin provides a strong locking force, preventing your seat post from slipping off during rides. Its durable construction, efficient design, and black color option make it a reliable and stylish choice for cyclists of all levels.
•❤Smooth Cam Action Lever: With a smooth cam action lever, our Seat Post Quick Release Pin offers effortless operation. You can easily lock or unlock the seat post without any hassle, enhancing your overall riding experience.
•❤Compatible with Various Bikes: Our Seat Post Quick Release Pin is compatible with both road bikes and mountain bikes. Whether you're an avid cyclist or a casual rider, this versatile accessory is suitable for a wide range of bike types.

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$4.99

$5.49

-9%

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Wileosix

Bike Seat Clamp Bicycle Seatpost Collar Diameter 31.8mm /34.9mm,Premium Lightweight Aluminum Seat Post Clamp

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Selection of parameters-34.9mm Bicycle Seat post clamp suit for out diameter 33.5mm to 35.2mm bike frame seat tube .
•Ultra Lightweight: Made from high-quality aluminum alloy material, this seat post clamp is designed to be incredibly lightweight
•Secure and Durable: With a fine surface finish, this seat post clamp is not only aesthetically pleasing but also built to last. Its sturdy construction ensures it remains secure and durable, even during intense rides.
•Universal Compatibility: Designed to fit most bicycles, this seat post clamp has a 34.9mm diameter, making it suitable for a wide range of seat posts. Whether you have a mountain bike or a road bike, this clamp is compatible with various models
•Reliable Performance: Engineered with precision, this seat post clamp provides a secure grip on the seat post, preventing any slippage or movement during rides. Enjoy a stable and comfortable cycling experience with this reliable clamp.

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$6.99

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