The STR-42 is the smallest and lightest 4-piston caliper developed from StopTech. Designed with high fluid pressures and forces in-mind, the STR-42 is the preferred option for blade type rotor systems. The stiff, lightweight STR-42 caliper provides a level of performance that did not exist before.

The STR-42 embeds the same race-winning paradigms of low mass, stiffness and application flexibility found throughout our caliper line in a package perfect for off-road, rally, circle track, formula cars and production base sports and compact cars.

 

  • Designed with high fluid pressures and forces in-mind
  • Ideal option for blade type rotor systems
  • Forged and weight-optimized, up to 20 percent lighter than standard calipers
  • Improved pedal feel and modulation
  • Provides consistent, confidence-inspiring performance
  • Fully machined caliper with MIL-spec hard anodizing that resists color change or fading

 

Classification

Number of Pistons
4
Weight
3.3 lbs
Max Rotor Outer Diameter
313mm
Rotor Thickness
5mm; 15mm; 20.6mm; 28mm; 32mm
Piston Range
28-40mm

Mounting

Radial/Axial
Radial Axial
Mount Spacing
120mm 133.4mm
Hole Size
10.3mm 10.3mm
Offset from Centerline
35.5mm; 40.5mm; 43.3mm; 45.7mm; 47mm; 49mm 18.1mm; 23.1mm; 25.9mm; 28.3mm; 29.6mm; 31.6mm

Compatible Pad Shapes

Pad Shape
Pad Thickness
15.3mm
Pad Volume
44.0cm3
Pad Annulus
42.2mm
Pad Drawing

Notes