Rhinowalk Top Tube Bag 22cm Waterproof Bolt-On Frame Pack — Lightweight TPU, Rigid Shell

The Rhinowalk waterproof top tube bag is a lightweight, bolt-on TPU pouch designed to mount on your bike's upper frame for secure, weather-resistant storage while riding.

This compact frame pack combines a streamlined silhouette with a rigid internal shell to protect essentials such as keys, phone, wallet, and multi-tools. Made from welded TPU fabric and a glued water-resistant zipper, the bag resists rain and spray while keeping weight low (152 g). Two mounting options—Velcro straps or screws—let you attach it to a variety of bikes, from road and mountain to fixed gear and commuter rigs.

How does this bag keep my gear dry in wet weather?

The Rhinowalk uses waterproof TPU material and a seamless welding process to limit water ingress. The closure is a glued zipper made to shed water at typical riding angles rather than relying on an internal dry bag.

• Seamless welded seams reduce leak points.
• Water-resistant glued zipper blocks splashes and light rain.
• TPU fabric resists abrasion and surface wetting.
• Streamlined shape helps water run off the pack.

Will this bag fit my bike and stay stable during rides?

The pack measures 22 × 5.5 × 5.8 cm and comes with both three Velcro straps and two screws, so it fits a wide range of top tubes and can be fastened firmly. An internal hard-shell support keeps the pouch from collapsing and prevents items from shifting during aggressive riding.

• Compact 22 cm length fits modern frames without interfering with knees.
• Velcro straps allow quick on/off and compatibility with chunky tubes.
• Screw-mount option secures the bag for a permanent or semi-permanent fit.
• Internal rigid shell protects fragile contents and maintains shape.

How practical is the design for everyday commuting and racing?

The aerodynamic, wind-breaking profile reduces drag and avoids contact with legs while pedaling, making it useful for both city commutes and faster road rides. The lightweight construction minimizes added bulk while the interior volume accommodates phone, keys, cards, and a compact multitool.

• Sleek shape reduces wind resistance and avoids thigh contact.
• 152 g net weight keeps the bike nimble and responsive.
• Enough capacity for daily essentials without excess bulk.
• Durable materials hold up to frequent mounting and use.

How do I choose between strap and screw installation?

Choose Velcro straps for convenience and fast removal; they’re ideal for rental bikes, frequent transfers, or irregular frame shapes. Opt for the screw fixings when you want a rock-solid attachment that won’t shift on rough terrain or during spirited rides.

• Straps: quick release, tool-free install, fits varied tube diameters.
• Screws: more permanent, minimal movement, best for steady setups.
• Both methods are included so you can test which works best.
• Installation choices let you adapt the bag to different bikes and use cases.

Who this is for: Riders who want a low-profile, weather-resistant frame pouch that balances protection and weight — commuters needing quick-access storage, cyclists who want a tidy place for small essentials on training rides, and urban riders who switch bags between bikes will all find this pack useful. If you want a durable, streamlined top tube bag with flexible mounting and a rigid interior shell, the Rhinowalk waterproof TPU top tube bag is built for that purpose.