Hi Danny!
I have managed to transfer my AXA Defender from Sherpa to my size 590M Nomad Mk2, and have detailed the process here:
http://www.thorncycles.co.uk/forums/index.php?topic=4523.msg23851#msg23851 I am thrilled with the outcome and simply delighted with the lock. It has worked beautifully and is a fully-integrated part of the bike. It provides real peace of mind against a snatch-and-grab theft while I am near the bike, and the AXA plug-in cable is a nice supplement to my Kryptonite U-lock when I do need to leave the bike briefly.
Adapting the lock to Sherpa was pretty straightforward, thanks to the AXA ATB mount (basically, a couple of plastic standoffs, two vinyl-coated "cup hooks", two toothed lock-washers, and a couple nuts). The "cup hooks" wrapped around the stays and the nuts engage the threaded ends to clamp the lock to the stays. I especially liked the standoff provided by the ATB mount's molded plastic blocks; they make it easy to floss out any dirt and debris that gets between the lock and seatstays and prevents the lock from abrading the paint.
It is not as easy or straightforward to adapt the lock to the Nomad because the Nomad's seatstays are larger in diameter and farther apart. I sent for several of AXA's worm-drive band-type mounting kits and after more than three hours of effort with each, gave up and simply modified the ATB cup-hook mounting kit. I am extremely pleased with the the results detailed in the link above.
Danny, in comparing your setup to mine, I think things are encouraging for a fit on your own Nomad. Let's take them each in turn...
1) You have a smaller frame. This may well present clearance problems, so let's return to this in just a bit.
2) I have my Zefal HPX2 frame pump mounted behind the seat tube and have clearance,
but my frame is larger than yours.
3) I am also running 26x2.0 Schwalbe Dureme tires, and have found they pass the lock opening nicely and clear the lock when mounted to the frame.
Once again, Danny your photograph is superb for giving an idea of clearances and -- boy! -- there isn't much, due to your smaller frame. I *think* you might be able to pull it off if you rotate your Topeak Mountain Morph a bit in its mounts so the attachment hose is on the side rather than the rear. You might even need to rotate the pump's zip-tied mounting bracket slightly to the right. If this works, clearances will be awfully tight, and the point of conflict will indeed be between the top of the Defender and the head/handle of the pump. If the pump could be relocated, I think the AXA Defender would fit with no clearance issues.
If you can't relocate the pump, adjusting the lock downward toward the mudguard would free up a bit of room as well. Currently, I have mine set with about 3.5mm above the rear mudguard, and it could be lowered so it is in contact, gaining that much room. I do think you'll have to be prepared to use and modify the AXA ATB mount and mill and reshape the plastic spacer blocks to get everything to fit, but if you decide to go through with it, I'm happy to provide measurements and suggestions. It helps to have a small drum sander and either a high-speed die-grinder or a Dremel Moto-Tool, but the job could also be accomplished with a sharp hobby knife, some sandpaper wrapped around a wooden dowel, and patience. Basically, the plastic seatstay "claspers" have to be removed, then the radius of the spacer blocks needs to be opened to match the larger diameter of the Nomad's seatstays, and the blocks thinned by 3mm each. The cup-hooks need to be opened to match the larger diameter stays, then the ends covered with a couple short sleeves of heat-shrink tubing. You can see the parts before I modified them here:
http://www.thorncycles.co.uk/forums/index.php?action=dlattach;topic=1944.0;attach=1435 Once I figured out what needed doing, the actual work went quickly.
I'm 8 hours behind you, and it is now pitch-dark at 19:22, so I will need to wait till tomorrow to get accurate photos and measurements for you; black-on-black needs more light for the details you need. In the meantime, you may wish to make an exact-size paper model; it is easy to photo-scale in most graphic applications if you have an onscreen ruler in the program. I did that myself, as detailed here:
http://www.thorncycles.co.uk/forums/index.php?topic=4148.msg18944#msg18944 Except for thickness, it really helps to see where things interfere. A nice photo of the AXA Defender appears here:
https://www.amsterdambikesusa.com/faq/axa-defender-rl-silver-dimensions/ JimK helped generously in my own search for a ringlock, and referenced a very similar photo here:
http://www.thorncycles.co.uk/forums/index.php?action=dlattach;topic=1944.0;attach=1435If you find the AXA Defender simply won't fit, the Abus Amparo 4850 might. JimK thoughtfully provided a scalable photo in this thread:
http://www.thorncycles.co.uk/forums/index.php?topic=4148.0 Both JimK and Pete (Il Padrone) have the Abus Amparo 4850 on their Nomad Mk2s, and it has worked well for them. I prefer the AXA for reasons detailed here:
http://www.thorncycles.co.uk/forums/index.php?topic=1944.msg19634#msg19634 , but it is just a matter of preference for my own needs; the Abus is a very fine lock.
Hope this helps. Photos tomorrow.
All the best,
Dan.