StopTech STR-40GT calipers were developed to introduce a stiffer endurance billet caliper to the racing world. During its development, Turner Motorsport, a technical partner, was crowned GRAND-AM GS Champions while campaigning the STR-40GT calipers. In addition to a championship win, the STR-40GT completed the 25 Hours of Thunderhill without a single pad change. Stiff caliper construction with the integration of StopTech’s patented bridge design proved to improve ABS functionality.

  • Forged and weight-optimized, up to 20 percent lighter than standard calipers

  • Stiffest calipers available with patented strengthening bridge for improved pedal feel and modulation

  • Caliper stiffness and differential bores eliminate pad taper and provide consistent, confidence-inspiring performance

  • Fully machined caliper with MIL-spec hard anodizing that resists color change or fading

  • Calipers increase pad life and ease pad changes

  • Removable bridge allows pad changes without removing the caliper

  • Vehicle specific systems optimized for rotor size, pad materials, wheel size, caliper clearance, weight targets, power, race length, tire selection, balance, etc.

 

Classification

Number of Pistons
4
Weight
9.1 lbs
Max Rotor Outer Diameter
380mm
Rotor Thickness
32-35mm
Piston Range
26-44mm

Mounting

Radial/Axial
Radial
Mount Spacing
180mm
Hole Size
12.3mm
Offset from Centerline 46.5mm; 48.0mm

Compatible Pad Shapes

Pad Shape
8562-DR17 8558-DR13 8557-DR13 8580-DR13 8578-DR27
Pad Thickness
27.9mm 28.0mm 26.0mm 19.7mm 19.8mm
Pad Volume
167cm3 136cm3 124cm3 85cm3 81cm3
Pad Annulus
61.5mm 49.1mm 49.0mm 49.0mm 44.5mm
Pad Drawing
     
Notes
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