Schwalbe Rock Razor Evo Super Gravity Trailstar review£55.00

Speed boosting rubber with impressive grip

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There are various Rock Razors, including a sub 700g ‘Snakeskin’ version but the Super Gravity uses the latest evolution of Schwalbe’s four-ply sidewall, two-ply under tread Gravity carcass.

Related: Six of the best fast rolling MTB tyres

This keeps the tread mobile for moulding to the trail but the tyre very stable at low pressures to the point where it feels like a rear suspension upgrade. Once you’ve got the thick sidewalls into place it seals easily and the sense of trail connection is outstanding for such a sturdy tyre.

At under a kilo it’s noticeably lighter and more agile in feel than most tyres in its category. The ranks of multiple small split topped knobs are ramped for even easier rolling and it adds instant and obvious pace. You can put a surprising amount of brake or chain torque through them without slipping though.

The transition onto the big softer compound side knobs is seamless too, so grip increases just when you need it for corner carving. The only downside is potential tread tearing or delamination if you start skidding and scuffing too much, so ride smooth and smart if you want a reasonable return on an expensive investment.

This article was originally published in What Mountain Bike 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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