- It may be the Croix de Fer’s little brother – but our CDA is still one mighty bike! Sharing the same geometry and legendary handling as the CDA 30 steel counterpart, the CDA swaps out steel for aluminium and in turn passes a nice cost saving on to you. The CDA 20 gets you an upgrade to Shimano’s excellent 9-speed Sora levers and mechs. Cable disc brakes and 37mm tyres make it the perfect entry into the world of adventure bikes. The fact that it’s compatible with a pannier rack and mudguards also makes it ideal as an everyday commuting workhorse, or winter training machine.