Sports: M-Wave Seat Post Clamp with Rack Mounts, 31.8mm, Black - Cycle Force Group

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Sports: Sunlite Alloy Seat Post Clamp with Rack Mount, 28.6mm - SUNLITE

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Sports: Outtag Retractable Aluminum Alloy Bike Mount Cycle Bicycle Rear Seat Post Rack (Cling-on easy install,max weight 22lb) - Outtag

Sports: Topeak DynaPack Bicycle Seat Post Mount Bag with Fixer - Topeak

Wireless: Samdi? Small Aluminum Bicycle Handlebar Seatpost Mount for Gopro Hero 4/3+/3/2/1 (Blue) - Samdi

Sports: Attwood Seat Mount With Spring Skin - Attwood

Sports: Shoreline Marine Seat Post - Shoreline Marine

Photography: Aluminum Bike Handlebar Seat Post Mount Adapter for GoPro HERO Cameras - Ridic Accessories

Sports: Cygolite Seatpost Mount For Hotshot - CygoLite

Sports: XLC Alloy Seatpost Clamp with Rack Mount 28.6mm Black - XLC

Photography: Yemo? Racing Cycling Seat Saddle Rail Mount For Gopro Hero 4, Session, Black, Silver Hero+, 3+,3, 2, 1 SJ4000 SJ5000 Session HD SJCAM (Black) - YEMO

Sports: Ibera Bicycle Seatpost-mounted Commuter Carrier IB-RA1 - BV USA, LLC.

Wireless: Samdi? Small Aluminum Bicycle Handlebar Seatpost Mount for Gopro Hero 4/3+/3/2/1 (Red) - Samdi

Sports: Topeak CageMount - Topeak

Sports: Wild-us Sports Camera Handlebar Seatpost Rack Mount Bicycle Holder Bracket Compatible with Gopro HD Hero 2 3 Promotion Sale - Wild-us

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Seat Post Mount Popular Q&A

Q: Seatpost mount for dynamo rack light?
A: Hi, Thanks, but unfortunately it's a modern frame with a small clamp in front of the seatpost. I have thought about using something like that but combining with... Read More »

Q: Can I use panniers on seatpost-mounted carriers?
A: No, you need a touring (frame-mounted) carrier like IB-RA3 Read More »

Q: A mountful, I know, but what else can explain the straight cable ...
A: The brakes say aging BMXer like nobody's business, while the minimalist seating says Razor scooter for new-school players—definitely not yours (or your father's... Read More »