These customizable bike seat locks are meant for saddles with vertical attachment bolts. Once installed, it’ll prevent someone from taking your seat off of your bike.
For around $55, (depending if you want a key or not) you won’t have to worry about replacing a stolen bike seat. If you choose a key, you’ll add $10 to your overall cost.
That’s a little pricey, but you get extra bike security—and the Pinhead is guaranteed to stand up to hammers, picks, and other tools.