Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount
Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount Lumos Firefly Rear Turn Signal Mount

Lumos Firefly Rear Turn Signal Mount

$29.95 USD

Lumos Firefly Rear Turn Signal Mount Fit Guide

Measuring your head size
Find a measuring tool Use a soft tape, rope or even your charging cable. Place it against a ruler to measure.
Measure your head Wrap it around your head, position it mid-forehead and above the eyebrows and ears.
Find your helmet size Identify if it’s a good fit. Lumos Firefly Rear Turn Signal Mount fits most head shapes with the adjustable dial fit system.

Determining Your Head Size

Sizing Small Medium-Large Extra Large
Inches 20in. - 21.7in. 21.3in. - 24.0in. 24in. - 25.6in.
Centimetres 51cm - 55cm 54cm - 61cm 61cm - 65cm
Weight (MIPS) 370g 409g 450g
Weight (Standard) - 370g -

Upgrade your bike's safety game with our all-new Turn Signal Mount, meticulously designed to meet industry-leading road safety standards.


Crafted from a durable all-metal body, this mount allows you to attach two Firefly lights 24cm (9.45") apart under your seatpost—making your intentions on the road clear as day.

The mount's strategic under-seatpost design not only offers a sleek, low-profile look but also gives you the flexibility to adjust the Firefly lights to the desired angle.

What's more, it's saddlebag-friendly, so you don't have to compromise on utility.

Product Specifications
  • Size
    • Length: 7.87" (200mm)
    • Width: 3.15" (80mm)
  • Weight
    • 1.06 oz. (145g)
  • Material
    • Aluminum alloy
  • Mounting Compatibility
    • Fits saddle rails with diameters between 0.28" - 0.39" (7mm - 10mm).
    • Can be attached on saddle rails spaced 1.77" - 2.95" (45mm - 75mm) from each other.
    • Requires a 0.43" x 0.79" (11mm x 20mm) gap below the saddle.
  • Safety Standard
    • Compliant with Motor Vehicle Safety Standard No.108 by the NHTSA.
What’s in the Box

This package includes:

  • 1 x Turn Signal Mount with seatpost bracket
  • 1 x Allen key
  • 4 x Small screws
  • 2 x Thumbscrews

*Universal Mounts to hold your Lumos Firefly are not included in the box.

Elevate Road Safety with Intelligent Turn Signalling

Unmistakable Signalling

Road safety-compliant distance of 24cm to mimic standard vehicle signals, ensuring clear communication and safer lane changes on the road.

Durable and Versatile Design

Made from a sturdy all-metal body that effortlessly fits under your seatpost for a more streamlined look. The mount allows for angle adjustments to your Firefly lights, ensuring optimal visibility. Plus, its design accommodates saddlebags, so you can carry your essentials without a hitch.

Seamless Angle Adjustments

Easily rotate your Firefly lights to the perfect angle, guaranteeing you're seen—and safe—from all directions.

Customer Reviews

Based on 37 reviews
Kevin is a great guy

I had the worst experience with lumos shipping. But all of this was made better by an amazing customer service rep Kavin. He ensured he responded promptly and heard all my concerns despite me never getting the item . But he made sure I was taken care of and supported

Brian Soucy
Firefly Turn Signal Mounts

I love them especially when riding alone and want to be seen! But i do get complaints on group rides that they are just a bit distracting! I still give them a thumbs up and 5 stars for safety reasons!

Klaus Morba
Top Artikel

Sehr gute Lösung und sieht auch top aus. Auch die Qualität ist scheinbar sehr gut

Dean Musser Jr.
Great job

Very happy with the service!

Valmik Vyas
Good mount overall

Overall I really like the mount for the lights. Depending how I am seated I occasionally bump into/displace the lights a bit. I have not yet tried to adjust to correct for it, though I imagine I may find a way to do so.

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