JT Sprocket, RR APRL 42T, Steel, pitch 525, Rear, Aprilia 99-10, 2010

• Computer-designed to achieve ultimate strength at minimum weight
• JT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable value
• Every sprocket meets or exceeds the highest possible quality standards set for the motorcycle industry
• Sprockets are heat-treated and bead-blasted to reduce material surface tension
• Front sprockets made with C45 steel and SCM415 chromoly steel alloy; rear sprockets made with top-quality-grade C45 high-carbon steel

NOTE: When installing sprockets which differ from OEM sizes, check for proper clearances before operating.