The light itself is great, but the little, tapered-edge alloy mount, right at the front with all the mass behind it is inadequate at best.

These lights are too expensive to have them fall off and go bouncing down the trail, not to mention the danger of an accident after being plunged into darkness at speed, and I can’t tell you how many times it’s happened to ours and guys we ride with who have these lights.

All that’s needed to cure the problem is a rearward facing platform on the mount to support the light under the battery section and a fat O-ring to roll up the body and around the mount platform. It would literally cost pence to fix the poor design. The light’s mass and oscillation of it on a rough trail is just too much for the skinny tapered bit of ally right at the front to support.

Exposure seem happier to replace knackered stuff that actually fix the design, which baffles me.

I’ve been having some issues since swapping my GX AXS to a different (new) bike and it’s been driving me bonkers.

Anyway, last night I figured out what is going on. The new bike has an XD cassette, and it sits about 2.5mm offset outwards compared to the other one, and there’s not enough range on the micro adjust to make it up, so I’ve had to make a thin shim to go between the frame and hanger, and a second one between the hanger and derailleur bolt.

I thought that would be that but, alas, no.

I’ve got other bikes on hand with XX1, X0, GX and NX derailleurs so fortunately I could compare the geometries of each.

It turns out that the actual shifting part sits much further forward on the AXS because the servo part is much more bulky, and this causes the top idler to be well forward of the cassette compared to the regular derailleur types so the angular deflection of the chain between the idler and the cassette is very much reduced, and it doesn’t always want to shift as a result. I dunno why they didn’t keep the relative positions of the hanger bolt and mech the same and have the servo more rearward of the hanger bolt, but it is what it is, and it’s not the first bit of stupid to be seen on bikes, is it?

So the solution I’m sure is going to be a new hanger with the derailleur bolt hole further back, to bring the top idler closer to the cassette. Unfortunately it’s going to have to be custom made, but at least I can address the offset issue in both directions with a single solution, rather than the slight ‘bodge’ of fitting shims.