11T 13T Rear Derailleur Pulley Wheel Constructed from Anodized Aluminum Alloy for Road MTB and Bikes with Multiple Speed Compatibility (11T (11T(red))
ZenithAur Aluminium Alloy Wheel 11T / 13T Rear Derailleur Pulley for Mountain Road Bike Performance (13T)
Drfeify Alloy Rear Derailleur Bearing, CNC Aluminum Alloy Ceramic Bearings Bike Pulley 11T 13T Rear Derailleur Guide Roller, Suitable For 7/8/9/10 Speed (Blue
Folding Bike Chain Stabilizer Single Speed Lightweight Tension Adjuster for Folding Bike with 11T or 13T Rear Derailleur, Aluminum Alloy Black & Red 63g
POENVFPO Folding Bike Chain Adjuster, Perfect Tension, Lightweight Mini Design, for 11T or 13T Rear Derailleur
Aosiyp Single Speed Chain Tensioner, Aluminium, Spring Design, Folding Bike Converter for 11T or 13T Rear Derailleur
