The Bully Quick Release Seat Clamp allows for easy adjustments w/out the need for a wrench. Run your seat lower at the spots, then raise it back up when you're cruising the streets. 1-1/8" (28.6mm) size for chromoly frames that use a 25.4mm post.
SPECIFICATIONS:
Material: Aluminum
Size: 28.6 mm
Color: Black only
Weight: 37.1 grams / 1.31 ounces