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Amazon.com: Bnineteenteam TX-30 Bicycle Speed Shifter Mountain Bicycle Shifting Lever Bicycle Thumb Gear Shifter for Mountain Bike, City Bike, Road Bike, Folding Bike Electric Bicycle Modification Accessories : Sports & Outdoors
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Amazon.com: Bike Shift Levers, 3X7 Speed Thumb Gear Shifters, Bike Gear Shifter, Bicycle Trigger Shifter with Inner Shift Cables for Mountain Bike Road Bike City Bike Folding Bike, 1 Pair : Sports
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Yet to wrap your head around how bike gears work? Here's our simple explainer for both beginners and intermediates | Cycling Weekly
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