Gamut P30s Dual chainguide review£99.99

Tough, fit-and-forget chain device

BikeRadar score3.5/5

The Gamut P30s family of chainguides includes Greg Minnaar's downhill World Championship-winning single-ring chain device – the Greg Minnaar Signature P30s – and also dual-ring guides like this one.

It's designed to fit a triple chainset, with the outer ring removed and replaced with the thick polycarbonate bashguard, not a twin-ring chainset with a chamfered outer spider face.

While set-up of the single-piece ISCG-05 boomerang is theoretically simple, chainring bolt clearance issues meant we had to remove the washers from the mounting bolts on our SRAM cranks/Giant Trance combo. We also had to find a full set of long chainring bolts in order to mount the bashguard.

Once it was finally fitted though, performance was really good. The broad, shallow angled lower slider guide works really well with a clutch rear mech to keep the chain secure without obvious pedalling drag or noise.

The bashguard is much tougher than previous, thinner Gamut offerings and has stood up to rock and log impacts without complaint. Because there's no roller or other moving parts to jam or come loose, it's been a fit-and-forget installation so far. At 137g, it's light, and it's reasonably well priced too.

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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