Specialized Mini Wedge
Unless you're unlucky or riding on particularly glass-strewn streets (Saturday mornings in south London are bad for that) you won't need to change a tube very often. But you always want a spare just in case and the best place to stash one, along with tyre levers and a multitool, is a discreet saddle pouch. Specialized's mini wedgie simply straps to your saddle rails and has just enough room for puncture-repair essentials.
Where: Evans Cycles (0870 142 0116; www.evanscycles.com)
How much: £10.76