Name: Knog Frog Rear
Brand: Knog
Availability: InStock
Rating: 85 (4 reviews)

85/100

BikeRide Score

Users (2 ratings)

Experts (2 reviews)

Where to buy

$16.77 Knog See it $19.07 eBay See it $24.10 Amazon See it $27.95 Dreamruns See it $28.19 Walmart See it

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Facts

Light Type

Rear

Mounting

Seatpost, Frame

Brand

Knog

Bike Type

Commuter, Mountain, Road

Lumens

20 Lumens

Battery Life

3 to 60 Hours

Power

Rechargeable

Weight

0.7 oz

Water Resistance Level

Water Resistant

IP Rating

IP65

Summary of Reviews

We have read all expert and user reviews on the Knog Frog Rear. In summary, this is what cyclists think.

5 reasons to buy

A tester praises the Frog Rear's creative and eye-catching flash patterns.
Owners appreciate the wide choice of nine modes.
The Frog Rear has a curved lens, which testers say provides good side-on visibility.
This light fits all common seatpost diameters (22.2mm to 32mm), including most aero seatposts, thanks to the stretchy strap.
The silicone casing keeps the Frog securely in place when mounted, according to reviewers.

2 reasons not to buy

The battery indicator is only visible when the light is off.
Testers consider this light insufficient for daytime visibility.

Bottom line

The Knog Frog Rear is a 20-lumen taillight with nine modes. It fits 22.2mm to 32mm seatposts or frame tubing. Owners praise the creative flashing modes, but at 20 lumens, it's inadequate for daytime visibility. Original Frog Rear owners appreciate the update to a rechargeable battery. Charge status is only visible after quick-pressing the light when it's off. Overall, the Frog Rear's eye-catching flash patterns do well in drawing attention at night, but it's expensive given its modest output. A brighter alternative at a similar price is CatEye's ViZ150.