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
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.