Descriptions and Recommendations
RS42
All-around racing compound with medium friction and medium bite. The strength of this compound is is extended low-temperature effectiveness, with a flat Mu curve from 400°C all the way down to 100°C (750°F down to 212°F). Recommended for Rally, small formula cars, and small Touring cars. Effective from 100°C to 750°C (212°F to 1380°F), optimum 500°C to 670°C (930°F to 1250°F) -- but the peak is very low compared to the baseline, with the entire Mu curve between about 0.40 and 0.45!
RS44
All-around racing compound with medium friction and medium bite. Excellent for most Club Racing, from small formula cars up to lighter sedans and production cars. Friction rises smoothly and gradually with temperature; coupled with excellent release characteristics, this is an easy-to-use and forgiving pad. Great choice on the rear axle of front-wheel-drive cars. Effective 300°C to 750°C (572°F to 1380°F), optimum 500°C to 700°C (930°F to 1300°F).
RSH29E
This compound was developed specifically for Vintage and Historic racing. The medium-to-high friction level is suitable for sprint races in GT and Touring cars, but its excellent pad and rotor life make it an ideal choice for endurance racing as well. Friction remains constant over a wide temperature range, and drivers will appreciate the low pedal effort after a long stint. Effective 200°C to 750°C (400°F to 1380°F), optimum 350°C to 650°C (660°F to 1200°F).
RSH42
This compound was developed for Vintage and Historic racing. The low-to-medium friction level works well in small formula cars or as a rear axle pad in front-wheel-drive cars (paired with RSH29E on the front). Excellent low-temperature effectiveness, with virtually no change in friction from dead cold all the way up to 350°C and a low but very wide torque peak. Effective from dead cold to 750°C (1380°F), optimum 500°C to 670°C (930°F to 1250°F) -- but the peak is very low compared to the baseline, with the entire Mu curve between about 0.40 and 0.45!
RSL2
Endurance racing compound with medium-high friction and bite. This compound has been tuned for excellent pad and rotor wear in GT, Touring, and Prototype endurance racing, but the superior release makes it at home in sprint races. Friction remains stable across a wide range of high temperatures. Effective 250°C to 750°C (480°F to 1380°F), optimum 350°C to 700°C (660°F to 1300°F).
RSL29
Endurance racing compound with medium friction and bite. This compound has been tuned for excellent pad and rotor wear in GT, Touring, and Prototype endurance racing, but the superior release makes it at home in sprint races. RSL29 is also a great choice for track day cars seeing long track sessions. Effective 200°C to 700°C (400°F to 1300°F), optimum 400°C to 650°C (750°F to 1200°F).
RST2
Sprint and stock car racing compound with medium friction and medium-high bite. Friction rises predictably and smoothly with temperature. Recommended for GT and Touring cars running high brake temperatures. RST2 can also be used in rallying on pavement. Effective from 250°C to 750°C (480°F to 1380°F), optimum 350°C to 550°C (660°F to 1000°F).
RST4
Sprint and stock car racing compound with medium friction and medium-high bite -- and a torque curve that's more like a straight line! Recommended for formula cars, Rally, and NASCAR long ovals. Temperature rises slightly to the peak, then holds absolutely steady all the way up to 750°C with no drop-off. Effective from 150°C to 750°C (300°F to 1380°F), optimum 300°C to 750°C (660°F to 1380°F).