Single-speeding your Double Chainring Bolts

If you've ever converted a double chainring-ed bike to a to a single chainring, you've likely run into a problem with the length of the chainring bolts. Double cranks usually come with bolts and nuts that are a little longer to compensate for the width of that second ring. Sure, you can buy some single speed chainring bolts or washers... or you can just take care of it yourself and save a few bucks.

What you'll need:
-chainring bolts and nuts
-5mm hex wrench
-a clamp, vise, or the ability to use two hands
-a file or dremel

1) Thread your chainring bolt into the back of the nut a few turns, like so.

2) Slide the chainring bolt onto your 5mm hex wrench.

3) Either secure the hex wrench to your table, a vise, or even hold it with your hand.

4) Run a fine file across the nut approximately 20 times.Congrats, now your chainring nut is likely short enough for a single chainring on a double crank. If not, file some more. 

The finished product with a magnet to collect filings.