Schwalbe Marathon Plus
"City streets tend to be riddled with potholes and covered with debris," Tony says, "Not a good recipe for long-lasting tyres. These tyres pretty much banish the fear of punctures - their secret weapon is a layer of SmartGuard Rubber under the thread, which forces penetrating objects back out. Other useful features include a reflective strip on the sidewall. The trade-off is that they aren't the lightest tyre on the market, but they might just be the toughest."
Where: Chain Reaction Cycles (028-9335 2976; www.chainreactioncycles.com)
How much: £25