S1AAR-S1MAR

Rear dual-caliper setup TAVRUS: the electronic S1AAR and the cable-actuated S1MAR, used together with the compact 4-piston S46R/S47R calipers. OVERVIEW S1AAR / S1MAR is a rear dual-caliper setup from TAVRUS. S1AAR has an electronic parking-brake actuator; S1MAR is cable-actuated. In a dual rear setup they work together with the compact 4-piston S46R/S47R calipers. The body is forged from aluminium alloy: forging delivers high rigidity, tensile strength, toughness and material density. Compared with cast aluminium calipers, body rigidity is about 50% higher, which reduces the risk of caliper failure in service. The built-in double oil seal (instead of ordinary external dust boots) makes the brake feel and reaction more precise. After anodizing and vacuum coating (CVD) the colour is locked in: the coating does not crack or peel and gives the caliper a metallic sheen and vivid colour. HIGHLIGHTS • Rear dual-caliper setup: electronic S1AAR and cable-actuated S1MAR. • The electronic parking brake (S1AAR) and the mechanical cable caliper (S1MAR) cover both common rear-axle layouts. • Paired with the compact 4-piston S46R/S47R calipers, the setup gives a precise pedal and stable braking. • With high-performance pads it handles intense driving with confidence — from mountain roads to the track. CALIPER SPECIFICATIONS • Weight: 2599 g/pc • Caliper dimensions: W151 × D190 × H101 mm (excluding the electric motor) • Oil inlet thread: M10×1 • Mounting hole centre distance: 150 mm • Mounting hole offset: 43 mm • Mounting hole diameter: 12.25 mm • Distance from mounting plane to the top of the disc: 39.32 mm BRAKE DISC • Fits brake discs 34 mm / 32 mm thick BRAKE PADS • Model: S1MAR-S1AA • Thickness: 3.1 mm • Friction surface width: 23.6 mm • Friction block area: 27.92 cm² × 2 pads per caliper • Compound: F500 (standard) / F600 (street, optional) / S750 (street & track, optional) / R900 (track, optional) / S800 (for carbon-ceramic discs, optional) QUALITY CONTROL • Forged body tensile strength: Qb ≥ 320 MPa • Body hardness: HV ≥ 400 • Low-pressure seal test: 0.4 MPa air, hold 5 s, pressure drop ≤ 100 Pa • High-pressure seal test: 12 MPa air, hold 5 s, pressure drop ≤ 0.2 MPa • Appearance: anodized surface free of damage, uniform colour and gloss • Ultra-high pressure test: sampled calipers withstand 30 MPa oil pressure without failure • Other characteristics per QC/T592.