Race Face Diabolus X-Type bottom bracket review

Great if you've got a BB-clamped chainguide

BikeRadar score3/5

Designed specifically for downhill/freeride duties, the Diabolus bottom bracket features deep cups for extra security. 

This makes it particularly suitable for bikes using a bottom bracket-clamped chainguide, without adding significant weight. It’s compatible with Shimano and FSA too.

The downside is that Race Face bottom brackets fail faster than any other big name bearings. A tight bearing-to-axle fit makes them easy to damage and susceptible when removing/installing cranks.

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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