Load a couple of motos on a chase rack and there's a real chance your truck's cab-mounted third brake light disappears behind wheels and fenders. The Big Days CHMSL kit fixes that: it extends a third brake light onto the Chase Rack System itself, so drivers stacked up behind you still see you braking — rack loaded or empty.
Everything mounts through the rack's T-track with the included hardware, and Big Days calls it an easy install — the listed install time is about 30 minutes.
Features
- Keeps your third brake light visible with a Chase Rack System installed
- Includes one 3rd brake light, two T-track mounts, and all necessary T-track hardware
- Simple installation — about 30 minutes per the listed install time
- Universal fit across the Big Days rack line
- Uses the same T-track mounting as other Big Days rack accessories
Because it rides the T-track, fitment follows the rack rather than the truck — any Big Days Chase Rack System build accepts it, whatever bed it's bolted into. Running lights too? The Lightbar Mount shares the same track. See the full add-on range in our rack accessories collection.
CHMSL Optional 3rd Brake Light FAQs
Why add a third brake light to a chase rack?
Because a loaded rack can block your truck's cab-mounted third brake light. Dirt bikes, fenders, and gear sit right in its line of sight, so this kit extends a third brake light onto the rack itself, keeping your braking visible to drivers behind you whether the rack is loaded or empty.
How hard is the CHMSL kit to install?
It's a simple install — the listing puts it at roughly 30 minutes. The light and its two mounts attach through the rack's T-track using the included hardware, the same way other Big Days accessories mount to the Chase Rack System.
Does the CHMSL kit fit every Chase Rack System build?
Yes. It mounts through the T-track that's common to the Big Days Chase Rack System, so any build tier accepts it. Fitment follows the rack rather than the truck — bed length and truck model don't change how this kit installs.
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