Tektro R539

Tektro R539 Long Drop Road Brake Caliper Set has a quick-release mechanism.
These Tektro dual pivot calipers feature a long drop (reach 47mm to 59mm) and recessed nut mounting.

Dual Pivot Caliper Brake
Quick Release Designed For Big Tires (32C)
With Quick Release Safety Lock
Standard Finish High Polish Silver or Black Anodized
Material Forged Aluminum Arms
Dimension 47 - 59 mm
Pads P475 adjustable angle cartridge pads
Weight 160 grams / wheel