Onza Greina FR 2.25in tyre - in brief review£34.99

Mountain bike tyre for wet and muddy conditions

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It’s primarily a wet mountain bike tyre, but the Onza Greina FR’s big open tread actually works pretty well on loose rock and loamy roots. 

It’s definitely a drifter rather than a railing tyre, but the medium compound keeps the movement predictable whether it’s loose kitty litter and rocks or wet mud under your tyres. As long as you don’t skid it and tear chunks off, it lasts okay through the year and is a decent choice if you can’t be bothered to change rubber based on the forecast.

The big tread spacing means it’s pretty slow and growly on pedally sections, but it’s not a bad weight (710g) to boost up to speed. The actual carcass dimensions are small for an alleged 2.25in tyre though (50.7mm width), so don’t go too low on pressure or too hard across sharp-edged rocks.

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: 44
  • 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 tfhan 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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