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Bontrager Flare RT Rear Light — Specs & Analysis
Manufacturer specifications, compared against every other lighting in our database. We do not test gear in the field — we measure, verify, and compare.
The Flare RT produces 90 lumens in a focused beam pattern visible from up to 2km in daylight. The daytime running mode uses a distinctive flash pattern that grabs driver attention without blinding following riders. USB-C rechargeable with up to 12 hours of runtime.
Who Is the Bontrager Flare RT Rear Light Best For?
Road and gravel riders who share lanes with traffic and need maximum daytime visibility. If that describes your riding style, the Flare RT Rear Light should be at the top of your shortlist. It sits in the Lighting category alongside 16 other products we track.
How It Compares
At 60g and $55, the Flare RT Rear Light is 15g heavier than the lightest option in this category (the Nitecore NU25 UL Headlamp at 45g). The most budget-friendly option is the Goal Zero Crush Light Solar Lantern at $30.
The price-to-weight ratio comes in at $92 per 100g — a premium price point, but you're paying for quality, materials, and design that justify the investment for serious bikepackers.
What We Like
- +90 lumens visible in full daylight
- +2km daytime visibility range
- +USB-C rechargeable
- +ANT+ and Bluetooth smart connectivity
Watch Out For
- −Premium price for a tail light
- −Mount can rattle on rough gravel
- −Flash pattern can annoy riders behind you in groups
The Bottom Line
We haven't scored the Bontrager Flare RT Rear Light, and neither has anyone else we can cite. It's here for its verified specifications and dimensions, which is what the fit tools run on — a score is an editorial judgement, and we don't hand one out until someone has a basis for it. What this page can tell you is measured: 60g, $55, and how both sit against every other lighting product we track.
Price checked against the manufacturer on 20 August 2026 — see the source.
Specifications and dimensions come from the sources listed above. Where a page draws on first-hand riding, it says so.
How it compares
Against the 17 lighting products we hold published specs for.
At 60g the Flare RT Rear Light is lighter than 15 of 16 alternatives we track, which makes it among the lightest we track. The category median is 110g.
At $55 it undercuts 12 of 16 of them, against a median of $70. That works out at $92 per 100g — above the $73 median for lighting products.
Weight and price come from published specifications. Cost per 100g is a blunt measure — it rewards light gear and says nothing about durability or whether the thing works — so treat it as one input, not a verdict.
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