Topeak FastFuel Tribag review

We've tested Topeak's top tube bag which can be fitted to either road bikes or tri bikes with screw-on bag mounting points

Cycling Weekly Verdict

The Topeak FastFuel Tribag is a quick way to add a small amount of extra carrying capacity to a road or tri bike, but gets in the way a bit when riding out of the saddle.

Reasons to buy
  • +

    Easy to fit and access

  • +

    Includes gel organiser

  • +

    Compatible with road and tri bikes

  • +

    Fixes securely

  • +

Reasons to avoid
  • -

    Not much capacity

  • -

    Rubs against your legs when climbing

  • -

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Adding extra carrying capacity to a road bike is a bit of an art and anywhere where you can tuck a small bag is welcome. The Topeak FastFuel Tribag has a capacity of 0.6 litres and is designed to fit to the top tube of a triathlon or time trail bike for in-race feeding, or to a road bike.

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I’ve used it on the latter, where it’s help in place by two Velcro straps around the top tube and one around the head tube. It also comes with bolts to fix it to a tri bike, if there are fixing lugs built into the frame.

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The Topeak FastFuel Tribag is made of padded nylon and comes with a central divider with loop straps to organise your gels, so that they stick up and are easy to get at when on the move. There’s also a mesh side compartment running the length of the bag for a phone or other small kit. I usually put my phone and food in my jersey pockets, but have found the bag a useful place to store a couple of spare tubes and a multi-tool for longer excursions.

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There’s not a lot of capacity for much more than this though and I found that although it’s quite narrow, I still tended to rub my legs against the sides of the bag when climbing out of the saddle, necessitating a slightly bow-legged climbing style. Nevertheless, the Topeak FastFuel Tribag is useful to carry that bit extra for longer trips or to organise your fuel if you’re competing in a triathlon this summer.

For more details visit Extra UK (opens in new tab).

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Paul Norman

Paul started writing for Cycling Weekly in 2015, covering cycling tech, new bikes and product testing. Since then, he’s reviewed hundreds of bikes and thousands of other pieces of cycling equipment for the magazine and the Cycling Weekly website.

He’s been cycling for a lot longer than that though and his travels by bike have taken him all around Europe and to California. He’s been riding gravel since before gravel bikes existed too, riding a cyclocross bike through the Chilterns and along the South Downs.