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Black hard-shell EVA top-tube bag with clear TPU phone window and three long straps

ROCKBROS B68-US 1.7L EVA Waterproof Top Tube Bag

SKU CH-QTSR-A78MP

Holds 1.7 L of gear and phones up to 7.2 inches in a rigid, waterproof EVA shell with a touch-sensitive window and three long straps that fit any frame

  • SizeMedium
  • Load capacity1.7 liters
  • Mount styleFrame Mount
  • Compatible vehiclesBicycle
  • Product typeHydration & Water Bottles
  • Main materialEVA
  • Universal fit with three extra-long adjustable straps fits all frames
  • 7 L oversized capacity stores daily gear and 7.2-inch phones with cases
  • High-sensitivity TPU touch window plus hidden earphone port enables GPS and calls on the move
  • Hard EVA shell with seamless waterproof zippers and rain cover protects contents in any weather
  • Reflective tapes on both sides boost night-ride visibility

Universal Frame Mounting

Three extra-long adjustable straps secure the bag to any bicycle frame without measuring. The design fits all frame sizes and stays stable on rough trails while allowing quick installation and removal.

Sustained Weather Protection

High-density polyester and seamless dual waterproof zippers block rain and dirt during long rides. The included rain cover adds a second layer of protection and the rigid 3D EVA shell resists deformation and absorbs shocks on bumpy terrain.

Check Leg Clearance Before Ordering

The 1.7-litre capacity is larger than standard 1.3-litre models and may rub against your legs while pedalling. Verify that your top tube area has enough space for the oversized dimensions and that your phone with case measures under 7.2 inches.

How it compares

Measured against everything we stock in Bike Lights, Racks & Accessories, at today’s prices. Recalculated every night.

Price $35.99
Pricier than about 74% of the 211 comparable items (median $25.99).

Specifications

Product
Brand nameHollywood Racks
Model nameB68-k001/Usa, B68-US
Part numberB68-US
Product typeHydration & Water Bottles
Size & build
SizeMedium
Main materialEVA
Mount styleFrame Mount
Compatibility
Compatible vehiclesBicycle
More details
Suitable forFemale
Load capacity1.7 liters

Questions about this item

Does the 1.7 L EVA shell trap heat against the top tube during long summer rides?

The hard 3D EVA shell insulates the tube, so the bag surface warms in direct sun but does not transfer noticeable heat to the frame.

What must my bike already have for the three adjustable straps to mount securely?

Any standard top-tube or frame profile works; the extra-long straps wrap around round, oval or oversized tubes without extra adapters.

Will the 7.2-inch phone window still respond to touch if I keep my older 4.7-inch device in a thick case?

Yes, the high-sensitivity TPU panel registers input through cases on phones from 4.7 to 7.2 inches, so the smaller handset remains fully usable.

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