Mk1 Penumbra

A 55x55mm bimetal evolution of the Umbra.

250 total produced. Released April 1st, 2026.

• 55mm wide
• 55mm diameter
• 64.0 grams
• 7068 aluminum body
• Stainless steel rims
• 10mm axle
• Size C bearing
• 19mm response pads