I recently bought a Motobecane Super Mirage to replace a Grand Touring that was stolen from me and found that, unlike my previous bike, it has no space available to hold my Kryptonite U-Lock and cable. After a little googling with no satisfactory DIYs found, I decided to build my own lock holder.
Why not use the one Kryptonite sells you ask? Because they are absolute garbage, thats why. I had one and it broke after the first few potholes, not to mention the shear force required to remove the lock from the clamp!
The best part about this holder, unlike some other ways, is that its compatible with locks that have either side mounted keyholes or top mounted.
This instructable took me about 15 min to complete, is super simple and cost about $5 for the clamps, which might be cheaper depending on where you go.
(I already had the other tools around the apt.)
Flat head screwdriver
(2) 7/32"-5/8" Hose Clamps*
(2) 13/16"-1 1/2" Hose Clamps*
*The size of the clamps will vary depending on the make and size of your lock and on the width of the cross tube on your bike. Although the bigger clamps have some size to them so they should fit most.
Step 1: Wrap the Tape
Be extra careful to make sure the clamps will fall in the middle of the tape when installed. If you have brake lines or shifter lines running the length of this tube, make sure you tape under them or the clamps and/or tape will screw with the shifting and/or braking. The same applies when installing the clamps.
Step 2: Install Clamps
Then, tighten the larger clamps around your crossbar where you previously wrapped the tape. I found that the best way to avoid snagging the excess metal from the bigger hose clamp on your pants is to install the screw pointing towards the ground. It's a little awkward to tighten it this way, but better in the end. Also make sure the 2 smaller clamps are in-line with each other.
Step 3: Thread the Prongs
The bent prong originally had black rubber all the way up to the bend which inhibited the prong from going all the way through the clamp so I had to cut around the rubber with the utility knife and peel it off. Unfortunately I didn't think to take a picture of this part but be CAREFUL when doing so!!
Lock the top and you're golden!
Step 4: Possible Additional Step
As you can see from the second photo, the holder has a minimal front profile and won't get in the way of pedaling if you install it correctly.
The clamps also prevent the lock from swaying too much. There may be some, but nothing noticeable.
Hope this helps!