Most of my road bikes don't have them either - framebag bladder, bladder in downtube.
These are the best cages though...
framebag bladder, bladder in downtube.
---> http://www.tritalk.co.uk/
Neither of them have been used for triathlon.
@Jaap started
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Most of my road bikes don't have them either - framebag bladder, bladder in downtube.
These are the best cages though...