Supernova TL3 PRO Seatpost Mount – Rear Light Bracket Adapter

The Supernova TL3 PRO seatpost mount is a vertical mounting adapter built for one specific light: the SUPERNOVA TL3 PRO rear light. It attaches that taillight to a seatpost or another vertical section of your frame. The housing is shaped around the TL3 PRO body, so the light sits flush and points in the correct direction.

This is a bracket only. The TL3 PRO rear light itself is sold separately. You therefore need to already own that Supernova model before installation. The set includes the adapter and two flexible rubber mounting rings. Those rings stretch to suit different tube diameters, so no extra shims are required.

Installation is a bolt-on process. It takes only a few minutes, and no specialist tool kit is needed. The mount suits both e-bikes and conventional bicycles. City frames and off-road frames are equally supported.

Key Benefits

• TL3 PRO specific fit – the housing matches the SUPERNOVA TL3 PRO rear light body precisely.
• Vertical mounting – designed for seatposts and other upright frame areas.
• Two flexible rubber rings – they adapt to a range of tube diameters without additional spacers.
• Bolt-on attachment – quick to fit, and just as quick to remove again.
• Correct beam direction – the light is held at the required angle, so illumination points rearward.
• Lightweight build – adds minimal weight to the seatpost.
• Secure grip – the rubber rings press the adapter against the tube without slipping.
• E-bike and bicycle ready – used on city frames as well as off-road frames.

Who Is This Mount For?

This adapter is made for owners of the SUPERNOVA TL3 PRO rear light. That is the only compatible light model. Other Supernova rear lights require their own dedicated brackets instead.

The mounting location is the seatpost or another vertical frame zone. What matters is a sufficiently flat clamping surface for the rubber rings. As a result, the adapter suits most common seatpost diameters found on modern bikes.

Riders of electric bikes and standard bicycles both use it. City frames and off-road frames are covered as well. It is often chosen when a frame has no space for a horizontal bracket on a rack or fender. In those cases, the seatpost becomes the practical alternative.

What’s in the Box?

• TL3 PRO seatpost adapter – 1 pc.
• Flexible rubber mounting rings – 2 pcs.

Technical Specifications

Why Choose the Supernova TL3 PRO Mount?

Unlike universal brackets, this adapter is made for a single model. The TL3 PRO therefore does not shift once fitted. It stays in the exact position the designers intended, ride after ride.

Second, the attachment relies on two flexible rubber rings rather than a rigid metal clamp. Consequently, you do not need to select a diameter-specific version. The rubber also protects the seatpost surface from marks and scratches.

Third, the adapter is optimised for vertical mounting. For horizontal fitting on a rack or fender, Supernova offers a separate bracket. Each mounting direction thus has its own precise solution.

Frequently Asked Questions

Does the TL3 PRO seatpost mount fit other Supernova lights?

• No. This adapter is made for the SUPERNOVA TL3 PRO rear light only.
• Other Supernova rear lights need their own dedicated brackets.

Is the rear light included in the set?

• No. The package contains only the adapter and 2 flexible rubber rings.
• The TL3 PRO rear light is purchased separately.

Which seatpost diameters does it fit?

• The flexible rubber rings adapt to most common seatpost diameters.
• A sufficiently flat clamping area is the main requirement.

Can I fit it somewhere other than the seatpost?

• Yes. Other vertical frame zones work too.
• The chosen spot needs a flat surface for the rubber rings to press against.

Do I need special tools for installation?

• No. The bolt-on attachment fits without a specialist tool set.
• Removal is equally quick when you want the light off the bike.

Does it work on e-bikes?

• Yes. It is used on electric bikes and conventional bicycles alike.
• City frames and off-road frames are both supported.

Will the mount damage my seatpost?

• The rubber rings sit between the adapter and the tube.
• They grip firmly while keeping the seatpost surface protected.

Can I use it for horizontal mounting on a rack?

• No. This adapter is optimised for vertical mounting.
• Supernova offers a separate bracket for horizontal positions.

If your frame leaves no room for a rack or fender bracket, the seatpost is the logical place for your TL3 PRO. This adapter puts it there with a precise fit, a protected clamping interface, and the correct rearward beam angle. Remember to add the TL3 PRO rear light to your order if you do not already own one.