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Manufacturers ->Porterfield Brakes -> R4-E

R4-E Endurance Race Compound – A carbon kevlar compound made to last a bit longer than the original R-4 compound.  The R4-E compound is designed to endure higher prolonged temperature and still has pad life as long or longer than Porterfield R-4 do.  This pad is great for club enduro events and applications where temperatures are at their maximum.


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