Front Wheel Kryptonite Bike Lock Hack

I had 2 kryptonite lock barrels that the U part was cut by some thieves with bolt cutters.

I trashed them, but then decided to keep them as evidence prints etc.

Had them laying around buried in my bike junkbox. I always loop my chain through the front wheel to prevent theft, in NYC I see plenty of bikes locked up missing one wheel.

So it occurred to me that I could use a kryptonite barrel if slightly modified.

Here are the results of my tinkering.

I decided the the easiest way to do it was to remove the brake posts from the front fork and replace them with modified bolts. I have disc brakes, so I didn't need the posts.

So I measured distance between brake posts and cut as needed.

The one on the left is the modified.

First I removed the plastic cover so i could reuse it.

Think I cut 1-3/4 inches from original barrel. I used a 4 inch grinder with a metal cutoff wheel.

Then you to cut a rectangular slot, do this after you figure out the bolt lock look at next step.

Find bolt with head big enough to fit key side and when locked will not come out.

I used a bolt with a larger head on the opposite side, ended up grinding the both sides of the head

so the bolt is like a T, the images with the black bolt are T.

Being screws made it easy to adjust how snug the lock fit.

After you have determined the distance of both bolt openings.

Mark and cut a rectangular slot for the T-bolt.

Again 4 inch grinder with metal cutting wheel, worked best for me.

Then cut plastic cover to size and reuse I used a box cutter.

Adjust bolt heights as needed.

Whoopie! no more looping chain through wheel.

more stuff on my blog

http://rtlbuiltdiy.blogspot.com/