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shifter - My bike goes up one gear at a time, but down two: is this normal? - Bicycles Stack Exchange
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1 Pair Bike Shift Levers, 3X7/8/9 Speed Bicycle Derailleur Gear Speed Left/Right Shifter (3x7 Speed), Shifters - Amazon Canada
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MOHEGIA Bike Shifter SL-TX30-7R,7 Speed Mountain Bicycle Right Thumb Gear Shift Lever : Amazon.ca: Sports & Outdoors
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