SRAM X-Sync Road Direct Mount Chainring for Rival 838781001240 There’s a reason why Dolphin

There’s a reason why Dolphin is the number 1 selling robotic pool cleaner

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(Measured when flying forward at a speed of 21

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SRAM X-Sync Road Direct Mount Chainring for Rival 838781001240 There’s a reason why DolphinSRAM X Sync Road Direct Mount Chainrings for Rival drivetrains feature a wide tooth, narrow tooth design to provides maximum chain control. SRAM X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control Laser etched chainring finish is more durable X Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear