Headset Cup Remover 1 1/4"

Most current MTB and gravel frames run a tapered head tube: 1-1/4 inch upper cup, 1-1/2 inch lower cup, with the lower cup carrying the larger lower bearing of a tapered steerer fork. When a tapered headset's cups need to come out (for a frame swap, a worn bearing seat, or a corrosion-stuck cup that won't release), the smaller-range cup remover doesn't reach. The 1681.1/4 is the larger-range remover sized for the 1.25 inch through 1.5 inch cup-ID range, and it covers a useful crossover use case on the PF30 bottom-bracket side as well.

How it works

Mechanically identical to the smaller 1.0 inch through 1.25 inch Headset Cup Remover 1681/4, scaled up for the larger cup ID. Spring-loaded tool-steel flanges fold flat as the working end passes through the cup bore from inside the head tube, then snap out past the back skirt of the cup. A hammer tap from the opposite end drives the cup out evenly across its back face.

The flange spec is what carries the load on every strike. Tool-steel flanges with spring tension don't fatigue across years of bench use the way softer-steel flanges do, and the flanges that snap out cleanly on tap one are the flanges that snap out cleanly on tap ten years later.

Spec

• Material: tool steel; flanges spring-loaded
• Range: 1.25 inch through 1.5 inch cup ID
• Bonus compatibility: PF30 bottom bracket cups (same ID range)

Compatibility

The 1681.1/4 covers:

• 1-1/4 inch upper cups on tapered head tubes
• 1-1/2 inch lower cups on tapered head tubes (the dominant tapered standard on current MTB and gravel)
• 1-1/2 inch headsets on straight head tubes (rare but still in production on some gravity-bike designs)
• PF30 bottom-bracket cups; the same ID range. The 1681.1/4 doubles as a PF30 cup remover for shops that occasionally see PF30 BB work and don't want to buy a dedicated BB cup-remover for it.

The crossover with PF30 BB cups is one of those edge benefits that doesn't show up in the headline use case. A shop that does both road headset work and gravel suspension work on the same bench gets two tools' worth of coverage from a single product.

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 1681.1/4 is the larger sibling in the cup-remover line; the construction is the same tool-steel-and-spring spec, the working geometry is the difference. The PF30 BB-cup overlap is one of those the kind of small Unior cross-application detail that earns the tool real time on a bench running both head-tube and BB-cup work.

Pro tip from our mechanics

For PF30 BB cup removal, treat the cup the same way you'd treat a headset cup: pass the remover through, let the flanges snap out behind the cup, and tap the opposite end of the shaft. The PF30 shell isn't as deep as a head tube, so the working depth is shorter, but the engagement is identical. A shop that owns this tool covers two cup-removal jobs with one purchase. How this connects to the headset workflow: Bearing and headset service: a workshop guide →