Specialized Adrenaline Pro D2 2.2£19.99

Predictable all round tyre that has broader use that its marathon inspired design.

BikeRadar score4/5

Specialized describe the Adrenaline as a fast marathon tyre, but don't think this is some skimpy racing skinny - it's a lot more useful than that. The single dotted line centre strip makes it steady, not sluggish, when rolling on hardtop, but there's plenty of sustained bite as soon as you start to turn or sink into softer ground.

We certainly had no sudden loss of faith or grip whether riding on dusty or sodden trails, and the combination of a hard-compound centre and medium-compound shoulders means it lasts well without compromising cornering and edging stickiness.

Don't be fooled by the relatively small 2 and 2.2in tyre sizes either, because they blow up much bigger and the 2.2 will match most 2.35/2.4in tyres for float and impact protection. Add a very reasonable price structure and the option of a budget singlecompound Sport version at £14.99 and you've got a great all-rounder.

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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