Aeris 120

The New Aeris 120 has landed. Stonkingly good trail Geometry meets our unique blend of easy to use features, making the Aeris 120 our most advanced bike yet.

Designed by us in the UK from the ground up, the Aeris 120 is a hard riding trail bike, but climbs like an XC whippet, while keeping the fun levels high when the trail heads downhill.

The new Aeris 120 features:

  • 120mm rear travel, 130mm front (frame is now stress tested to take 140mm forks).
  • All new tube-set, designed to give the best stiffness to weight ratio
  • All other parts machined, for precise tolerances and quality all round
  • New mini-collet axle system
  • One piece hollow section yoke
  • 148 Boost rear end
  • One piece brake/axle assembly for maximum precision and minimum squeal
  • Metric shock sizing
  • Double bearing shock mount to give the smoothest suspension movement
  • 1x specific rear end for maximum stiffness
  • Removable ISG05 mount
  • Bottle cage mounts!

Of course we’ve not dropped what made the original Aeris 140 so popular:

  • Maxle rear axle
  • Fantastic pedalling performance combined with a supportive shock curve
  • External cable routing, because we live in the UK
  • Threaded Bottom bracket
  • Max compliment sealed cartridge bearings on all pivots
  • Tapered ZS44/ZS56 headset
  • Reverb stealth routing
  • 650b wheels
  • A stonkingly good price
  • 5 sizes, 3 colours and complete configuration control on all models

Complete Bikes


  • Aeris 120 Frameset

    From: £1,000.00

    Aeris 120 Framesets available with fast shipping turnaround! Normally just 2-3 working days. All Bird frame-sets come ready to build with clean chased BB threads, tapped ISG05 mounts and axle threads, as well as fully faced BB and headset. Optional components include: Headset Forks Axle Rear Shock Wheels Seatclamp


Image Gallery


Bird Aeris 120, Technical Data Sheet V1.0