Frame bag
Uses the empty triangle inside your frame — the lowest, most stable place to carry weight. Perfect for a lock, tools, a charger, or a packed lunch.
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The main triangle is dead space on most bikes, and it's the ideal place to carry heavy, dense items: a U-lock, your tool kit, a spare charger. Because the weight sits low and centered, a loaded frame bag barely changes how the bike handles — unlike a heavy basket or rear load.
Full-frame bags maximize space but may crowd a bottle cage; half-frame and top-tube 'bolt-on' bags leave room for bottles and are easier to fit around a downtube battery. Measure your triangle (many e-bike downtubes are fat) and check whether your bag straps on or bolts to cage mounts.
Additional options
Topeak Tri DryBag Top Tube Bag
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Also worth a look
Revelate Designs Tangle Frame Bag
Made-in-USA, five sizes, bombproof zippers — the bikepacking standard that lasts for decades.
Topeak MidLoader Frame Bag
Three sizes, compression straps, water-resistant — purpose-built to carry the heavy stuff low.
See the full specsRockbros E-Bike Frame Bag
Waterproof 4.5L top-tube/frame bag sized for fat e-bike downtubes — the value pick.
See the full specs
Pro tips from the e-bike pros
- Carry your heaviest items here — low, centered weight handles best.
- A fat e-bike downtube can shrink the triangle; measure before buying.
- Keep straps clear of your knee path so they don't rub while you pedal.
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