BOS Kirk2 1-Way review£530.00

Supportive air shock that's best reserved for racers

BikeRadar score3.5/5

The BOS Kirk2 1-Way is definitely a racer’s shock. The open-mode compression tune is relatively firm, and while we rammed most shocks full of volume spacers to get the desired level of progression during testing, this was as progressive with no spacers at all.

This will prevent mellower riders, or those with naturally progressive bikes, accessing full travel. For our needs, though, it was about right. 

Off the top suppleness was pretty good, though it felt a little dead further into the travel.

Removing the air revealed a pretty high degree of friction compared to some of its peers, but it’s also to do with the rebound tune.

We found the beginning stroke rebound too fast, causing bucking on take-off, or after hitting bumps when seated.

Slowing down the rebound caused less sensitivity in the mid-end stroke because the rebound shims couldn’t open up enough to allow it to recover quickly in this part of the stroke.

The firm pedal mode makes it an efficient climber and our rebound woes would be lessened if we could run it even more progressively, but most riders will find it lacking in sensitivity.

Seb Stott

Technical Writer, UK
Seb is a geeky technical writer for BikeRadar, as well as MBUK and What Mountain Bike magazines. Seb's background in experimental physics allows him to pick apart what's really going on with mountain bike components. Years of racing downhill, cross-country and enduro have honed a fast and aggressive riding style, so he can really put gear to the test on the trails, too.
  • Age: 24
  • Height: 192cm/6'3"
  • Weight: 85Kg/187 lbs
  • Waist: 86cm / 34in
  • Chest: 107cm / 44in
  • Discipline: Mountain
  • Preferred Terrain: Steep!
  • Current Bikes: Focus Sam 3.0, Kona Process 111, Specialized Enduro 29 Elite
  • Dream Bike: Mondraker Crafty with Boost 29" wheels, a 160mm fork and offset bushings for maximum slackness.
  • Beer of Choice: Buckfast ('Bucky' for short)
  • Location: Bristol, UK

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