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Mountain 52Hz Waterproof Framebag


The 52Hz Framebag is a fully waterproof, expedition-ready frame pack.

Not sure what size best fits your bike? Print out all the template sizes and hold them up to your bike: Print Mountain 52 Hz Templates


  • Zipperless, roll-top closure
  • 100% waterproof, welded construction
  • Mil-spec webbing and hook & loop
  • Single compartment without accessory pockets
  • Universal fit for popular current MTB geometry
  • Adjustable downtube attachments
  • 315g (size MTN Medium)


This product was developed by Porcelain Rocket; a Canadian company widely credited as being pioneers in the modern era of bikepacking bags. They developed many ground breaking designs including the first fully stabilized seat pack and the first 100% waterproof framebag.

Today, Rockgeist continues the legacy of Porcelain Rocket by partnering with them to manufacturer their welded, waterproof designs in our workshop located in Asheville, North Carolina.


Additional information

Weight 16 oz

Small: 6 Liters, Medium: 7 Liters, Large: 9 Liters, XL: 11 Liters


Small: 10.2 oz (289 grams), Medium: 11.7 oz (332 grams), Large: 12.2 oz (346 grams), XL: 13.5 oz (382 grams)