I think it starts with bottle cages and too big ... and then moves on to ... F*#$&#$#, there is just no place to mount this without it hitting my leg!!! Bag under seat for tools, water bottle, and a ULock ... am I asking too much!?
Then people reply with their unintentionaly condiscending responses ... "why don't you just get a mini, or hang it from the top tube"?
BECAUSE!!! ... I already gave up on a standard ULock and was trying to find space to mount a mini. Even the mini won't fit!
And you final verbalized here something I've always forgotten to point out ... that many sections of the frame cannot be utilized because of the wires running along them. Why do they make those stupid mounts the way they do!?! Do these manufactures not look at bikes when designing them!?!?!
OK ... ENOUGH ranting ... now some advice
Both Krypotnite and On Gaurd have mounts that will address the above problem. They are harder to find in the stores, but I can send you to a link with pictures so you know what to look for.
On Gaurd's version
The pictures will explain this best, but basically ... instead of a plastic clamp with two screws pulling it together (a setup that would interfere with wires) ... the above two mounts have a plastic strap that hugs the tube and is tightened from below. You can feed this strap under the wires without it touching them. Trust me ... I just picked one up tonight and tried it! Success!
Unfortunetly, I'm now having spacing issues with my mini (even on a 21" frame) ... as the mounts are a little bigger than the screw type ... in the sense they don't hug the frame as I would think they should (to conserve space) ... thus bringing the lock out an inch or two from the frame ... and in turn bumping the water bottles.
How can someone not have designed a solution to this problem!?
Hope the above links help for your specific situation!