Gemini Olympia 2100 6-cell bike light - in brief review£219.99

Tunable light with long run times

BikeRadar score4/5Find prices on Bicycle Blue Book

Gemini’s Olympia is a usefully powerful and reliable light with epic run times for the money.

The three-LED head fits any size of bar with a selection of O-rings, and helmet and head strap (useful for camping and late-night race prep) mounts are included. The battery is small enough to mount easily on most bikes too.

It’s not the brightest ‘2,000-lumen’ light, but the beam mixes decent peripheral coverage with plenty of central detail and reasonable reach.

The output of the three power levels is easily tunable. There's a flash setting between the low and high modes, which is a bit irritating, and another downside is that there’s no output indicator or life display besides a low warning. Having said that, the Olympia 2100's huge run times mean the latter is not an issue on the trail.

The reliability of all Gemini lights that we've had on long-term test has been excellent too.

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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