Seatpost Clamps
seatpost clamps — pre-owned
Browse 1,326 seatpost clamps — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.
Salsa Lip Lock 36.4 Seatpost Clamp Collar Rare Color Green Ano
Old logo style and green anodized color is no longer made.36.4mm clamp size. Clean condition.
Seat Post Clamp 31.8 Ultimate Machine Vintage
Vintage intimate machine seat post clamp, this was originally red and you can see the anodization  coming off , the external appearance is mostly silver. This would be perfect on a vintage resto build or a fixie. Asking $12 OBO, if you have any questions let me know!!
1996 Diamond DB Stamped Seat Clamp Red Anodized REACTOR 34mm Mid School BMX
Original mid-school BMXDiamondback Reactor seat clamp from the mid-1990s. 1996 Diamondback Reactor BMX Seat Clamp – 34mm – Red Anodized – Mid School DB Stamped. Perfect for a proper Reactor restoration or any period-correct mid-school BMX build.
Primo BMX Seatpost Clamp Old Mid School Black Seat Post Collar Pr1mo Logo OG VTG
Good used Primo seatpost clamp. 28.6mm inside diameter. It works properly and weighs less than most other Primo clamps. Black anodized with laser etched Primo logo. It has nicks and scratches from use. Ships promptly and professionally packaged.
Vintage Primo BMX Bicycle Seatpost Clamp Black Tall Double Bolt No Bolts 75g
Both threaded bolt holes have rough, worn threads and may need chasing or repair before use; clamp is sold without any bolts.
KK King Kong 90's Anodized Seatpost Clamp 31.8mm
Super Cool 90's clamp with purple anodizing. Pivot works smoothly, super cool clamp.
Fuji Bicycle Seatpost Clamp 30mm 29.9 mm Alloy Bolt-On Black MTB Road 90s 00s
Fuji Bicycle Seatpost Clamp 30mm 29.9 mm Alloy Bolt-On Black MTB Road 90s 00s Approx 30mm Item: Bolt-on bicycle seatpost clamp/collar in black anodized alloy. Features a hex pinch bolt design; printed warning "DO NOT OVER TIGHTEN" on the ring. Side label indicates max torque and size; distinctive logo graphic on the ear. Suitable for road, MTB, gravel, or commuter builds; lightweight, low-profile design. No UPC located; stickers with specification details are present as shown. Notes: Please confirm compatibility with your frame before purchase. Used with noticeable scuffs, paint chips, and tool marks on the bolt head. Threads engage smoothly and clamp operates correctly. Logos show wear from regular use.
You save $2.88
LIZARD SKIN BMX DOUBLE BOLT SEAT POST CLAMP Gold 25.4 MM
Used but fully functional
Odyssey Svelte Seat Post Clamp Quick Release Silver Stainless Vintage MTB
The Shadow Conspiracy Alfred BMX Seatpost Clamp 28.6 Blue HTF
Perfect for any bicycle restoration.
2-Haro Seatpost Clamp 28.6 mm Fade Old Mid School BMX gt dk redline robinson
GT Dyno BMX Seatpost Clamp 1”/25.4mm Alloy Vintage
Clamp itself in great condition, wear to logo. See photos.
VIntage GT BMX Seatpost Collar Clamp 25.4 mm Silver Aluminum Alloy Dyno 90s
VIntage GT BMX Seatpost Collar Clamp 25.4 mm Silver Aluminum Alloy Dyno 90s Condition: Used – good overall condition with visible cosmetic wear, scuffs, and some rust on the bolt as shown in photos. Fully functional with no cracks.
You save $8.37
Mongoose Californian Pro BMX Old School Seatpost Clamp.
Old School Mongoose Californian Pro BMX Seatpost Clamp. Black early 80’s
Vintage Rocky Mountain Bicycles RMB Seatpost Clamp QR
Authentic vintage condition. The "RMB" laser-etched logo is clear and visible. There is some light surface oxidation/rust on the steel pivot pin and bolt (standard for its age), but the lever action is smooth and the threads are clean. A great finishing touch for a vintage Rocky Mountain restoration.
Vintage Schwinn BMX Seatpost Clamp Black Alloy Old School 45g Bolt-On Bike
Salsa Post Lock 30.0 Seatpost Rack Mount Collar Bikepacking Tour Crust SimWorks
Salsa "Post-Lock" 30.0mm seatpost clamp rack mount. Mounts to your 30.0mm seatpost and provides an additional mounting point for racks or other accessories. Adds great versatility to your bike. Pre owned condition. Super clean. Looks and works great. Please review all photos and feel free to message us with any questions. Orders always ship next day!
You save $4.80
Purple Anodized Seatpost Clamp 32mm Fits Gary Fisher Rig MTB Collar Violet
Notes: Photo shows a note reading "Gary fisher Rig"—appears removed from or for that model. Details/features: Single-bolt clamp design with hex-head fastener and captive nut, rounded low-profile shape, bolt-on collar style; torque spec 7 Nm printed on part.
You save $8.75
Specialized Black Aluminum Seatpost Clamp 38.6mm
38.6mm seat tube size. Light surface scratches shown in photos.
Vintage Answer MANITOU MTB Seatpost Clamp
You save $33.95
28.6mm alloy Bmx cycling old style seat post clamp GT05194
See all pictures for condition Works fine and looks Some scuffs here and there Mainland US shipping only. Puerto Rico, Hawaii and Alaska will have added shipping costs. Serious international buyers only. If you would like your items to be insured, please let us know and there will be additional shipping costs. Buyer is responsible for all shipping costs. Note: International Shipping is subject to higher shipping costs due to fluctuating shipping rates.
Vintage Schwinn XS BMX Seatpost Clamp Approx 29mm 30mm Black Alloy Single Bolt
Vintage Schwinn XS BMX Seatpost Clamp Approx 29mm 30mm Black Alloy Single Bolt Item: Bicycle seatpost/seat tube clamp, bolt-on style Color: Black Material: Aluminum alloy construction Approximate Size: Around 29 mm inner diameter based on sizing gauge shown in photos Weight: 55 grams as shown on the digital scale in photos Design/Features: Low-profile body with single hex bolt; oval XS logo; rounded edges Intended Use: Suitable for BMX, MTB, and road frames that require a clamp near this diameter Notes: Please confirm clamp size compatibility with your frame before purchase; logo and hardware visible in photos
You save $12.09
Powerlite BMX Seatpost Clamp 25.4 mm Old School BMX Freestyle Hex 80s 90s OG
Powerlite BMX Seatpost Clamp 25.4 mm Old School BMX Freestyle Hex 80s 90s OG
You save $14.00
PURPLE ANODIZED SEATPOST CLAMP w/Vintage Dia Compe Cable Guide/Hanger 31.8mm 60g
Includes Dia Compe cable guide. 60g Weight. Weight 60g. We're here to provide friendly and personal service for all cyclists. Condition Guide. We specialize in preowned bikes and components.
You save $6.25
GT SEAT POST CLAMP 90's MID SCHOOL GOLD ALUMINUM RACING MACH 1 SPEED SERIES 28.8
The Seat Clamp You See Is The Seat Clamp You Will Receive.
Vintage BMX Alloy Bicycle Seatpost Clamp Bolt-On BMX Road 25.4 45g Part
Vintage BMX Alloy Bicycle Seatpost Clamp Bolt-On BMX Road 25.4 45g Part Item: Bolt-on bicycle seatpost clamp. Color: Red anodized finish. Material: Alloy (aluminum-style construction). Fit: Sized for approximately 25.4-25.6 mm frames as shown on the sizing post in the photos. Weight: 45 grams per digital scale. Design details: Single-bolt clamp with hex-head fastener and threaded barrel, rounded low-profile body for road or MTB use. Brand: Not marked/unknown. Approximately 25.4 - 25.6 clamp diameter as measured. Used vintage seatpost clamp with multiple cosmetic scuffs, scratches, and small nicks in the red finish. Bolt, nut, and threads are intact and turn smoothly. No cracks or structural damage visible.
You save $5.40
Kalloy Vintage Textured Seatpost Clamp Quick Release QR Bike
Bird 31.9 32 mm Seatpost Clamp Hawk Eagle Logo Black Alloy Fixie Mountain Bike
Bird 31.9 32 mm Seatpost Clamp Hawk Eagle Logo Black Alloy Fixie Mountain Bike Condition: Good used condition with visible scuffs, scratches, and marks from previous use, as pictured. Clamp and bolt are fully functional. Features a laser-etched eagle logo on the front face in white. Clamp diameter measured at approximately 31.97mm
You save $12.90
Old School BMX Seatpost Clamp Fluted Black 25.4 Alloy Fits Redline 80s 90s
Fluted Seatpost clamp from an OG Redline BMX
You save $43.20
Vintage Softride Seatpost Clamp Guts Beam Rail Allsop Seat Clamp
Vintage Softride Seatpost Clamp Guts Beam Rail Allsop Seat Clamp Adjustable Softride Seatpost Clamp. Weight: 120 g. Only the parts shown in the pictures are included.
You save $3.50
Tuf Neck Seatpost Clamp Old School BMX OG 1980s USA Black 25.4 Tuff Alloy A001
Old School BMX Tuf Neck Seatpost Clamp OG 1980s USA Black 25.4 Race Tuff Alloy
You save $11.90
HARO FUSION SEAT CLAMP 25.4mm
HARO FUSION SEAT CLAMP 25.4mm PLEASE SEE PICTURES FOR DETAILS!
GT BMX Seatpost Clamp 25.4mm Black Alloy Vintage 1990s Bike Part PIston
GT logo has been worn off and is no longer visible. Clamp bolt and threads appear intact, but overall appearance is used and weathered.
You save $4.50
Old Mid School 1990s HARO BMX 2-Bolt 28.6 Seat Clamp 25.4 Post GROUP 1 FUSION
Clean used BLACK WithHARO Chevron BMX LOGO. Good Usable Condition. Item sold used "as is". No warranties, implied or otherwise.
Vintage Primo Products Viking Double Bolt Seat Clamp, Mid School 90’s
The Vintage Primo Products Viking Double Bolt Seat Clamp is a high-quality bicycle component designed by the reputable brand Primo. This seatpost clamp features a double bolt design, providing a secure and stable connection for your seat. With its vintage style, this product not only offers functionality but also adds a touch of retro aesthetic to your bike. Perfect for cyclists looking for a reliable and stylish seatpost clamp for their vintage bicycle.
Black Thomson 34.9 Bolt-on Seatpost Clamp
Giant Iguna MTB Bicycle Seatpost Clamp in Excellent Pre-owned Condition 34.9mm
Nice Original Schwinn Stingray Early AS Seat Post Clamp Assembly, Fastback
Nice original USA Schwinn seat post clamp assembly. Early to mid 60's style with the AS bolt and step nut. Not a cheap Chinese replacement. Works on tons of different model Schwinn's from the 60's-80's
Crupi BMX Seatpost Clamp 31.8 mm Green Alloy Single Bolt Bike Collar 90s 00s
Edges and inner surfaces show small areas of color loss, and the steel binder bolt has tool marks and light surface discoloration. Clamp has no cracks or bends, threads engage cleanly, and the collar tightens securely; only the single clamp with attached bolt shown in the photos is included.
Vintage GT BMX Seatpost Clamp 28.6mm Silver Alloy 25g Old School 80s Logo
Clamp band and hardware are intact with no cracks or bends.