Seatpost Light & Radar Mount for XDS AD8 / AD9

Aero seatposts are raked backwards. Taillight mounts are not. Bolt a Garmin Varia to a raked post with the mount it came with and your radar ends up tilted toward the sky — scanning the treetops instead of the road behind you, and throwing its light where nobody is driving.

Cut for the XDS AD8 and AD9 aero seatpost profile. The mounting angle is built into the part, so the light sits level with the ground. Fit it, tighten it, done — nothing to shim, nothing to guess at.

Why the angle matters

• Radar needs to look where the cars are. A rear radar has a fixed vertical detection cone. Point it up and you shorten the range at which it picks up an approaching vehicle.
• Light output goes where it's aimed. A taillight angled at the sky is dimmer to the driver behind you at every distance that counts.
• No fiddling. Wedges, shims and stacked O-rings move under vibration. A mount cut for one seatpost shape doesn't.

Features

• Model-specific fit: shaped to this seatpost's exact profile — seats flush, doesn't rotate.
• Level by design: the correct angle is printed into the part.
• Saddlebag-friendly: positioned so a tool bag doesn't block your light. Run both.
• TPU, minimal bulk: flexible impact-resistant plastic; grips without heavy clamping force on carbon.
• All screws included.

Choose your light

Pick the variant matching your taillight or radar. All Garmin quarter-turn lights are covered; the GoPro-interface variant also takes a race number holder. The light itself is not included — this is the mount only.

If your exact light isn't listed, email support@xecycle.shop and we'll tell you honestly whether it fits.

Fitting

Slide the mount onto the seatpost from below, position it clear of your saddlebag, and tighten evenly. Don't overtighten — TPU grips well without heavy torque, and excessive clamping force on a carbon seatpost is its own problem. Check it before every ride; replace after any crash.