FSA K Force Light Mega Exo ATB review£500.00

Mega expensive cranks for serious gram savers

BikeRadar score4/5

The K Force Lights are mega expensive, but serious gram savers should be delighted.

Already proven on their road cranks, FSA’s hollow carbon crankarms and deep cut chainrings are remarkably stiff for their low weight.

If you never use your granny ring anyway, the double chainring option here saves 60g over the triple while retaining most race ratios.

You even get ceramic bearing BB cups (£184.95 separately!) to suck out the last few grams while increasing lifespan. 

Chainring life and shifting is good too, although the Torx chainrings bolts will mean a trip to the tool shop.

They are cosmetically and crash fragile though, so don’t go mental with them. Price is high too, but potentially worth if for performance freaks.

Reassuringly expensive, incredibly light and stiff elite race cranks, but be careful with it off well groomed courses

Guy Kesteven

Freelance Writer, UK
Guy started filling his brain with cycle stats and steaming up bike shop windows back in 1980. He worked the other side of those windows from '89 while getting a degree in “describing broken things covered in mud" (archaeology). Dug historical holes in the ground through the early '90s, then became a pro bike tester in '97. Guy has ridden thousands of bikes and even more components the world over since then and can remember them all in vivid, haunting detail. Can't remember where the car keys are, though.
  • Age: 45
  • Height: 180cm / 5' 11"
  • Weight: 68kg / 150lb
  • Waist: 76cm / 30in
  • Chest: 91cm / 36in
  • Discipline: Strict sadomasochist
  • Preferred Terrain: Technical off-piste singletrack and twisted back roads. Up, down, along — so long as it's faster than the last time he did it he's happy.
  • Current Bikes: An ever changing herd of test machines from Tri bikes to fat bikes and everything in between.
  • Dream Bike: His Nicolai Helius AM custom tandem
  • Beer of Choice: Theakston's Old Peculier (not Peculiar)
  • Location: Yorkshire, UK
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