I just bought a Carradice Nelsen Longflap saddlebag off eBay, so I'm losing my little seatbag, which is where I have my PBSF blinkie mounted. The Carradice doesn't have a blinkie loop, so I need to move the taillight. Best option is the rack. I have a Tubus rack on another bike, and the Planet Bike taillight mount bolted right on to it, but the Axiom rack has a vertical metal tab with one and a half holes drilled in it. Doesn't look like the PB mount will work.

How am I going to do this? A taillight is a necessity. Yes, I have one mounted to the blinkie strap on my helmet, but I'd like one on the bike too.

Take a look at this page. https://peterwhitecycles.com/taillights-bat.asp#racks

first off, I would ask someone you trust to follow you and judge if your bag-mounted or helmet mounted lights are doing anything for you. In my experience, they are highly ineffective most of the time.

PB sells a rack mount adapter, hopefully someone will chime in with a link

Well, I poked around Planet Bike's website, and they sell a "rack hardware kit" that looks like it'll work. This, combined with PB's taillight mount will solve the problem. I don't understand why Axiom included the tab that had one and a half holes. WTF is with the half hole?

https://ecom1.planetbike.com/4000_1.html

That one has two holes on the vertical part.

You can purchase a bracket that mounts on the Axiom rear rack. Here's the link from Planet Bike: https://ecom1.planetbike.com/3108.html

Thanks, but that wasn't the only part I needed. Looks like I need this one too : https://ecom1.planetbike.com/4000_1.html .

Axiom's tab is weird.

I kludged an adaptor similar to the one that no1mad linked. I just grabbed some of the flat straps with holes in them from the hardware store, bent one of them, and bolted them together.

The mounting screw goes in the top hole,
the half hole is good enough for the anti-rotation pin,
that is commonly molded in the back of reflectors..
a light mounting clip should have a similar arrangement .

I bought an oval Cat Eye Blinkie that is permanently mounted by a screw ,
just like a reflector.. it works OK.

Doesn't the carradice have the metal tag on it? If your superflash has the clip it should hold it nicely. Maybe with a judicious piece of duct tape to tighten it up a bit.

This is an old Carradice(seller said vintage but it's old LOL). There is a small leather strap towards the bottom of the front of the bag, but it puts the light in a less than optimal position. The parts I ordered from Planet Bike should do the trick.

I cut up a strip of old tire tubing and wrapped it tightly around one of the rear rack posts until it was thick enough for the standard blinkie mounting hardware, zip-tied the tubing so it didn't unfold, and then mounted the blinkie vertically. Haven't had a drop of trouble with it. It should be noted that I never tried to mount it horizontally, because I thought with the weight and all the bouncing the light might "wiggle" out of place and start facing downward....but vertically mounted, it's cake!

Loosen the screw that holds the L-shape metal piece, and turn it 90deg. Then, unscrew the mounting bracket all the way and "sandwich" the L-shape metal piece with the bracket. Advantage of this mounting method is no need to buy anything extra. Bad news is that the light would be a little offset from the center axis of the bike but that's merely cosmetic.

+