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Amazon.com: MAKELEN Shimano Twist Shifter Lever Revoshift Shift Lever SL-RS35, 7 Speed Twist Grip Gear Bike Right Shift Lever for Mountain Bicycle : Sports & Outdoors
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Amazon.com: ZUKKA Revoshift 7 Speed Shimano Right Shift Lever SL-RS35-7R Bicycle Twist Shifter Lever Mountain Bike Commuter Bike Folding Bike : Sports & Outdoors
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My daughter's Trek came with a 6-speed Shimano Revoshift SIS Index. It's a new bike. She can shift to higher gears easily but does not have the grip strength to shift back
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SHIMANO Tourney 3x6/7 Speed Shifters SL-RS35 REVOSHIFT Shift Lever 3×6s 3×7s 6v 7v 18 21 Speed Original parts - AliExpress
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