Frisco E-Bike
Green and black helmet on a bike handlebar

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Bags · ROCKBROS

ROCKBROS Top Tube Bag with Phone Window

A top tube bag is the cheapest way to carry keys, a wallet and a phone without a backpack, and ROCKBROS makes the most common version: a strap-on pouch with a touch-screen window on top and a small cable port. On e-bikes with a battery in the downtube, the top tube is often the only free frame real estate. Waterproofing is 'resistant', the window dims touch sensitivity, and a larger phone may not fit, so check the listed dimensions. It is a cheap, useful bag, not a premium one. For a charger you will still want a trunk bag or pannier.

Riders who want a no-backpack commuteKeys, wallet and snack storageStep-through and folding e-bikes with limited frame spaceBudget shoppers

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Key considerations

  • Check phone dimensions against the window
  • Straps can rub paint — add tape
  • Water resistant, not waterproof
  • Wide versions can rub knees

Pros

  • Cheap
  • Phone visible while riding
  • Fits most frames
  • Light

Considerations

  • Screen window reduces touch accuracy
  • Limited capacity
  • Straps loosen over time

Goes well with

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Green and black helmet on a bike handlebar
Bags

Topeak MTX TrunkBag DXP

The MTX TrunkBag DXP is the classic commuter trunk bag: it slides onto a Topeak MTX QuickTrack rack and locks with a click, then fold-down side panels drop into small panniers when groceries run over. It has a bottle holder, reflective trim and a rain cover. The catch is the rack: you need a Topeak MTX-compatible rack or adapter plate for the slide-on mount. For e-bikes with a stock rack, Topeak sells adapter plates, but measure first. It is a very convenient system for the charger-and-lunch crowd because you can pull the whole bag off and carry it inside.

Best for: Commuters carrying a charger, lunch and a layer · Quick grocery runs · Riders who want a bag that clips on and off in seconds

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Bike with a rear cargo bag
Phone Mounts

Lamicall Bike Phone Holder (clamp style)

Lamicall's clamp-style holder represents the large category of universal mounts that grip the phone with spring-loaded arms and need no special case. It is the easy, cheap answer for riders who do not want to commit to an ecosystem, and for loaner bikes, kids' bikes or a second e-bike. The phone can rotate to landscape and the clamp fits most bars. The honest downside of every clamp mount is the same: vibration from fat tires and rough pavement can loosen the grip over time, and the arms cover part of the screen edges. Tighten it, check it, and do not use it on technical trails.

Best for: Budget shoppers · Riders who change phones or cases often · Casual neighborhood rides

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Sold on Amazon

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