This Trick Stops Cranks from Eating Your Pants as You Cycle

I have personally lost track of the number of pants that bicycle cranks have shredded, or at least branded irreparably with that dreaded chainring tattoo. Instead of securing your pant leg with a goofy elastic or wearing skinny jeans, however, you can simplify your bike's drivetrain and fashion a custom chain-guard by de-toothing one of the front 'rings.

First I'll show you how I did it using some cheap steel cranks where the chainrings are riveted together. Then, I'll explain how you would apply this to make a nice-looking chain-guard for your fixed-gear or single-speed bike, starting from a pair of regular road bike cranks...