2-Cyl, 1/2 HP @ 90 RPM
Join Date: Oct 2003
Bikes: 04' Specialized Hardrock Sport, 03' Giant OCR2 (SOLD!), 04' Litespeed Firenze, 04' Giant OCR Touring, 07' Specialized Langster Comp
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With Sora shifters, on your right shifter, the brake lever moves you to a larger rear sprocket. The thumb lever moves you to a smaller rear sprocket.
On the left shifter, the brake lever moves you to a larger front sprocket and the thumb lever moves you to a smaller front sprocket.
You're either at the extremes and can't shift anymore or you're not pedaling, in which case it won't do anything when you try to shift.