Shimano CT-S500 Alfine Spec Chain Tensioner TB The Dual Layer tube will

The Dual Layer tube will have you covered

WARNING: ALL CHIN BARS HAVE LIMITS

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Shimano CT-S500 Alfine Spec Chain Tensioner TB The Dual Layer tube willSHIMANO ALFINE Double Pulley Chain Tensioner Perfect for SHIMANO ALFINE equipped bicycles, the double pulley chain tensioner can accommodate a front chainring difference of 16 teeth and sprockets sized 18 to 20 teeth. PRODUCT SPECIFICATIONS MODEL NO CT S500 SERIES ALFINE S7000 S700 Series Color Silver Black Compatible cassette sprocket CS S500 Max. rear sprocket 20T Min. rear sprocket 18T Dropout Vertical drop end type Structure Double pulley