Sumart Universal Bleed Block Tool (2-Piston Caliper) - Black GSRD which transforms the downtube’s open

which transforms the downtube’s open space into practical in‑frame storage

How accurate is the power measurement

“SM” (20 mm wide) for common tubular rims (width of the gluing channel between 18 and 22 mm)

Packed full of natural oils

Sumart Universal Bleed Block Tool (2-Piston Caliper) - Black GSRD which transforms the downtube’s openThe UBB 20 Universal Bleed Block is an essential tool designed for maintaining hydraulic brake systems, specifically engineered for 2 piston calipers. This tool helps prevent damage to ceramic pistons during the bleeding process. It can be adjusted by hand or with a 3mm Allen key if necessary. Specifications Protects Ceramic Pistons: Designed to prevent damage to ceramic pistons during maintenance 2 Piston System: Specifically engineered for 2 piston