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Check This, Before You Snap The Chain On New Shimano 1x12 SLX, XT Or XTR Drivetrain...
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MIXING Shimano 11 and 12 Speed??? XTR 12 speed M9100 Shifter with 11 Speed Drivetrain
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LTWOO AX shifting performance
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Shimano 12 speed chain test - XTR vs XT (vs SLX vs Deore)