When you need to shed absolutely every spare gram on your bike, you need to start getting creative. Yeah, you could drill holes in your crank arms, or you could just swap out your current seatpost collar with the Loaded Precision X-Lite Seatpost Binder Clamp. It's about as sexy and lightweight as a binder clamp can get. The clamp is made with CNC-machined 7075 aluminum with an incredible level of detailing and precision that reveals a level of craftsmanship not usually seen in small parts. The 24g weight doesn't hurt either.
7075 aluminum is strong and incredibly lightweight
CNC-machined and milled for lightweight, finely detailed construction
Titanium binder bolt sheds a few grams and resists corrosion