The Solano is compatible with Centuar carbon/Veloce/Mirage compact Ultra-Torque cranks. CNC machined. The 5th arm is slightly offset for crank fixing. The 5th bolt hole has no recess for a bolt head as this bolts straight into back of crank.
TAX inners: all Compact Ultra/Power-Torque cranks
**TAY outers: Carbon Compact square taper and Record carbon/Chorus
carbon/Centuar alloy compact ...