Rotor Rex 1.1 QX1 crankset review£374.99

Cranks with oval ring option

BikeRadar score3.5/5

Rotor’s new alloy crankset offers carbon beating performance, with a unique oval ring option but noticeable gear grind at extremes.

The arms use Rotor’s Trinity Drilling System technology, which makes them very light without obviously sacrificing stiffness. The unique offset-bolt 76mm BCD stub spider can be swapped for SRAM or Specialized versions, and the rings are available in Rotor’s QX1 oval design to smooth out power delivery, or standard round format. Narrow-wide teeth add chain security but there’s more grind at the extremes of the cassette than with SRAM rings.

Rings and BBs will cost you extra. Performance is on par with similarly priced carbon cranks, and cheaper versions (REX 2 and 3) are available.

This article was originally published in Mountain Biking UK magazine, available on Apple Newsstand and Zinio.

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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