Advertisement As you might expect from Bird, the geometry of the Aether 9’s aluminium frame is on the more ‘radical’ end of the scale, with long reaches and slack head angles, and at the point of purchase you have the option of modifying the specification to suit your riding needs or pocket depth. Bird’s bikes are designed in the UK. Russell Burton / Immediate Media My test bike came with a smattering of my favourite components. A 140mm Pike fork from RockShox, a Shimano XT drivetrain, carbon hoops from DT Swiss and aggressive Maxxis tyres to match the dank and dark muddy woods in which I’ve been testing the bike. For £3,850, we reckon this represents excellent value for money.