JT Sprockets

Online Catalogue

Aprilia 125 RS Extrema

Road

1993 to 2003
Front Sprocket
Part No.Teeth
JTF39417
Available Sizes
11, 13, 14, 15, 16, 17
Rear Sprocket
Part No.Teeth
JTR70141
Available Sizes
39, 40, 41, 42, 43
Chain
PitchLength
520

Please note that the chain shown in this listing is for size reference only. For the correct chain type and grade, please refer to the vehicle's manufacturer manual.

Gear Ratio Chart

Full Gear Ratio Chart (pdf)

Teeth111314151617
393.553.002.792.602.442.29
403.643.082.862.672.502.35
413.733.152.932.732.562.41
423.823.233.002.802.622.47
433.913.313.072.872.692.53