Waterproof black top-tube bag mounted on a gravel bike
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB
Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB

Fellmont Outdoors · 14:29#Black-1L

Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB

£44.99 £64.99Save 31%
  • Welded seams and a waterproof zip, so it is properly waterproof rather than shower resistant
  • TPU-coated 600D fabric with a reinforced base that holds its shape loaded
  • Slim tapered profile designed to sit close to the frame and not rub your knees
  • 1 litre - a phone, a tube, levers, a CO2 cartridge, gels and a cable
  • Straps to any frame, or bolts through M5 bosses for a rattle-free mount
  • 1 litre is deliberately small; this is a ride-essentials bag, not a luggage bag
Colour

In stock, ships by Wed, 4th Nov

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  • 30 Day Returns
  • Free Shipping
  • 1 Year Warranty
Delivery & returns

Tracked delivery on every order. Returns accepted within 30 days in original condition.

What's in the box
1 x Rhinowalk 1L top tube bag Mounting straps Bolt-on hardware for M5 bosses
Specifications
Brand Rhinowalk, Territory Series
Model BWJ0802
Capacity 1L
Material TPU-coated 600D fabric
Construction Seamless welded seams with a waterproof zip
Mounting Straps, or M5 bolt-on where the frame has bosses
Shape Slim anti-rub profile with a reinforced base
Colour Black
Weight and dimensions No published figures
IP rating None published. The construction is waterproof; it is not a submersible dry bag
Product care
Rinse road salt and grit off the outside through winter and let it dry open. Keep grit out of the waterproof zip - that zip is the most expensive part of the bag to ruin. Do not force the zip; run it slowly and clear any trapped fabric. Check the strap or bolt tension every few rides. It is waterproof, not submersible. Do not jet wash it.
Full details

Properly waterproof, not just shower resistant. The Rhinowalk 1L Top Tube Bag, available from Fellmont Outdoors, is built from TPU-coated 600D fabric with seamless welded construction and a waterproof zip, so your phone, spare tube and snacks stay dry through a full day of British weather rather than slowly getting damp.

The slim, tapered shape is designed to sit close to the frame so it does not rub your knees as you pedal, which is the usual complaint with cheaper frame bags. A reinforced base helps it hold its shape when loaded and resists wear where it meets the top tube. Inside, the 1 litre space is just right for a phone, energy gels, an inner tube, tyre levers, a CO2 cartridge, coins and a charging cable. It is a sensible size for a long ride, big enough for the things you actually need and small enough to stay out of the way.

You can fit it with straps on any frame, or bolt it down through M5 bosses on frames that have them for a rock-solid, rattle-free mount. It suits road bikes, gravel bikes, mountain bikes and e-bikes, and it is a sensible first upgrade for bikepacking or long audax rides. Order your Rhinowalk top tube bag from Fellmont Outdoors today.

  • Brand: Rhinowalk, Territory Series
  • Capacity: 1L
  • Material: TPU-coated 600D fabric
  • Construction: seamless welded seams, waterproof zip
  • Mounting: straps or M5 bolt-on
  • Shape: slim, anti-rub profile with reinforced base
  • Colour: black
  • Model: BWJ0802
  • 1L Ride-essentials capacity
  • Welded Seamless waterproof construction
  • M5 Bolt-on or strap fit

Waterproofing

Welded, not stitched.

Most frame bags are sewn, and every stitch is a hole. This one is **seamlessly welded** with a **waterproof zip** over **TPU-coated 600D fabric**, which is the difference between a phone that is dry after six hours of British drizzle and one that is **slowly, quietly damp**.

  • **Welded seams** - no stitch holes to leak
  • **Waterproof zip**, not a storm flap over a normal one
  • **TPU-coated 600D** outer

Shape

The knee-rub problem, solved.

The usual complaint about cheap top tube bags is that your knees clip them on every pedal stroke, which is maddening within a mile. This one is **slim and tapered to sit close to the frame**, and the **reinforced base** stops it slumping sideways into your leg once it has weight in it.

  • **Slim tapered profile** to clear your knees
  • **Reinforced base** holds its shape loaded
  • **Resists wear** where it meets the top tube

Mounting

Straps anywhere, bolts where it counts.

On any frame it **straps on** in a couple of minutes. On a frame with **M5 bosses** on the top tube — most modern gravel and adventure bikes — you can **bolt it down** instead, which removes every trace of rattle and movement. That is the fit worth having if you ride rough surfaces.

  • **Strap fit** works on any frame
  • **M5 bolt-on** for a rock-solid, rattle-free mount
  • **Road, gravel, MTB and e-bikes**
  • 30 Day Returns

  • Free Shipping

  • 1 Year Warranty

Customer Reviews

Includes reviews collected from other sales channels.

5.0 out of 5 Based on 4 reviews
  • 5 4
  • 4 0
  • 3 0
  • 2 0
  • 1 0
  • Twanda Schamberger20 October 2026

    Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB

  • Kathryn Dibbert8 September 2026

    Good build quality. the tpu straps seem to be quite strong as well. lightweight if you remove the hard supporting structure inside the bag.

  • Magdalen Doyle30 July 2026

    Good overall quality, fits well on salsa cutthroat and not rubning too much on my knees

  • Jules Cummings11 June 2026

    Looks nice. Happy with the item. Comes with straps and bolts. The pad goes over the bolts.

Frequently Asked Questions

Is 1 litre enough?
For ride essentials, yes - a phone, a spare tube, tyre levers, a CO2 cartridge, a couple of gels and a charging cable fit without a struggle. It is deliberately small: a bigger top tube bag is a bigger thing for your knees to hit. If you want to carry lunch and a jacket, you want a frame bag or a saddle pack instead.
Will my knees hit it?
That is the specific problem the tapered shape is built to solve, and the reinforced base is there to stop it slumping outwards when loaded. Fit it as far forward on the top tube as the straps or bosses allow, which gets it further from your pedalling.
What does M5 bolt-on mean, and does my bike have it?
Many modern gravel, adventure and bikepacking frames have two threaded M5 bosses on top of the top tube just behind the head tube, specifically for bags like this. Look for two small bolt holes there. If your frame has none, use the straps - it fits either way.
Is it really waterproof, or just water resistant?
The seams are welded rather than sewn and the zip is a waterproof one, which is the construction used for genuinely waterproof bags. No IP rating is published and it is not a submersible dry bag, so do not jet wash it or drop it in a river. In rain, it keeps things dry.
Will it fit an e-bike?
Yes - it straps to the top tube like any other frame, and the fatter top tubes on many e-bikes are not a problem for the straps. Check there is a clear run of top tube where you want it, since e-bike frames often have cabling or a display mount in the way.
Can I get a phone in and out while riding?
You can open it one-handed once you are used to the zip, but we would not recommend doing anything with a phone while moving. The sensible use is to stop, which takes ten seconds.
  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
T
Twanda Schamberger

Waterproof Top Tube Bag – 1L Rhinowalk Bikepacking Frame Bag with Welded Seams & Waterproof Zip, Bolt-On or Strap Fit for Road, Gravel & MTB

K
Kathryn Dibbert

Good build quality. the tpu straps seem to be quite strong as well. lightweight if you remove the hard supporting structure inside the bag.

M
Magdalen Doyle

Good overall quality, fits well on salsa cutthroat and not rubning too much on my knees

J
Jules Cummings

Looks nice. Happy with the item. Comes with straps and bolts. The pad goes over the bolts.