4-piston brake caliper

360° Traction sole block pattern offers better grip on various types of pedals and terrain

and in this case

REARHUB:  Shimano FH-RS470

SHIMANO GRX - Hydraulic Disc Brake - DUAL CONTROL LEVER - 11-speedThe SHIMANO GRX DUAL CONTROL LEVER delivers light and responsive shifting for mixed-terrain riding

Teravail Superlight 700c x 35-43mm 60mm Presta Valve Tube rear-derailleur 4-piston brake caliperTeravail Superlight tubes for lightweight high performance; featuring removable valves and . 76mm wall thickness. Dealers can expect to receive mixed packaging for a period of time as the Q Tubes brand is phased out and replaced by Teravail tubes. In all cases Teravail tubes will serve the same functional range as their predecessors at a minimum. In some cases Teravail tubes may serve a broader functional range. . 76mm wall thickness Removable Presta