I like the idea of the Abus frame lock however I was unable to find 5650l nr anywhere on the net. Checking the specs on both locks they appeared to be similar. I also spoke w/the US Abus rep & he verified the fastening dimensions for both locks was the same.
I purchased the 5750l nr & installed it on my radcity step thru. I needed to remove the rear wheel & slightly file both top slotted holes to mount the lock. Easy installation, looks good, it fits & operates perfectly.