The CNC aluminum Lezyne Control Drive CO2 puts a new twist on the familiar screw-on CO2 inflator. Literally. You can screw the CO2 cartridge all the way in to the Control Drive and only release CO2 as you want by tightening and loosening the control knob.

The knob is marked with a graphic, just in case all the blood is pumping through your legs and you can't get your workout-addled mind around the "righty tighty" concept. It's also oversized, so you can operate it without taking off your gloves during cold-weather pit stops. The Control Drive works on Schrader and Presta valves, and Lezyne also thoughtfully includes a CO2 cartridge sleeve to protect your hands from the cold.

• Pressure release control
• Oversized construction
• CO2 cartridge sleeve
• Schrader- or Presta-compatible