Pro Repair Clamp, Auto Adjustable

The auto-adjustable clamp head for the Unior 1693 Pro Repair Stand family. Push the bike's frame tube into the open jaw; the spring-loaded clamp closes around it without you having to set the jaw width first. The everyday workshop-pace alternative to a manually-adjusted clamp where the mechanic measures the tube and sets the jaw before each bike.

Where it fits

The 1693.1-US is the replacement / standalone clamp head for the 1693 stand line. A workshop with multiple 1693 stands can keep the same model of clamp on each stand for repeatable workflow, or pair an auto-adjustable on one stand with a manually-adjustable (1693.1S-US) on another for the cases where a slow, deliberate clamp is the better tool.

Compatibility

• Frame tube diameter: 24 mm to 32 mm
• Fits the Unior 1693 Pro Repair Stand family (1693B-US, 1693BS1-US, and others in the 1693 line)
• Replaceable rubber jaw covers (1693.11) for grip and frame protection

Specs

• Clamp type: auto-adjustable, spring-loaded
• Jaw width range: 24-32 mm
• SKU: 1693.1-US (629233)

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and is the official technical partner of multiple World Tour and downhill teams. The 1693 Pro Repair Stand series is the workshop-grade stand line in Unior's bench-organization catalog; the auto-adjustable clamp is the spec choice for shops doing high-volume work where each setup second matters across a day.

Pro tip from our mechanics

Auto-adjustable beats manually-adjustable on time per setup, but loses a small amount of control on the clamping pressure. For a frame tube that's at the lower or upper end of the 24-32 mm range, the auto-adjustable's spring sets a working pressure that's correct for the range's center; outside that, you'll want the manually-adjustable version (1693.1S-US) where you can dial the jaw opening to the specific tube and set the closing pressure with a hand-turned screw. Most shops carry both formats on different stands so each is available when its workflow fits.

For the broader picture on workshop equipment essentials, including repair stands alongside the wrenches and torque tools: What bike tools do I need? →.