Knog Frog Rear

89/100
BikeRide Score
?
Scores
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Users (2 ratings)
90
Experts (2 reviews)
88
Knog Frog Rear
Where to buy
$21.86 Walmart See it $23.24 Knog See it Amazon 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. Published Feb 07, 2025 by Rachel Rushing.

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.

Expert Reviews

88/100 based on 2 scored reviews (4 reviews in total)
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93
The Sweet Cyclists
Level 1 expert

Knog Frog Silicone Bike Headlight Taillight Light Review

Level 1 expert

… if you’re looking for attractive and fun be-seen bike lights, the Knog Frog lights are hard to beat.

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87
?
This review has been given a score. Read more here
Singletracks
Level 5 expert

The Knog Frog Is Back and I’m Madly in Love With It

Level 5 expert

… this is a pretty badass blinky light, and easily the best one on the market right now (believe me, I’ve checked).

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Electric Bike Journal
Level 1 expert

One of Our Favorite Taillights Has Gotten Even Better. The Knog Frog Lights Are Durable and Bright.

Level 1 expert

It’ll hold on tight… you can even throw it on your helmet or a backpack…

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ETNH.CC
Level 3 expert

New From Knog: Blinder R-150, Blinder Link and New Frogs! [Polish]

Level 3 expert

Frogs shine surprisingly brightly for their size, COB LED technology, gives huge possibilities for visualizing transitions and blinking light.

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User Ratings

90/100 based on 2 ratings
  • 5 star
    100%
  • 4 star
    0%
  • 3 star
    0%
  • 2 star
    0%
  • 1 star
    0%

Rankings

Compared to other bike lights
#6 Best Rear Light
Top 30%
#7 Best Seatpost Light
Top 40%
#2 Best Knog Light
Top 20%
#11 Best of All Lights
Top 30%

Best Bike Rear Lights

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Bike Light Comparison

Knog Frog Rear in comparison to averages
Knog Frog Rear
89
Average All Bike Lights
83
Average Knog Light
83
Average Rear Light
83

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