Shimano 105 RD-R7100 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Design 36t Max Low Model=Apex Innovative Nanofber in the heel

Innovative Nanofber in the heel and forefoot with tiny micro treads increase surface area frictional force and gripping power

}Wolf Tooth 6-Bit Hex Wrench - Multi-Tool Purple

Semi Integrated Cable routing (SCR)

Charger parts for Shimano STEPS

Shimano 105 RD-R7100 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Design 36t Max Low Model=Apex Innovative Nanofber in the heelShimano 105 RD R7100 Rear Derailleur 12 Speed Direct Mount One Spec Shadow Design 36t Max Low. The Shimano 105 12 speed rear derailleur combines the smooth and stable shifting that is a staple of Shimano Shadow RD design with direct mount compatibility and a wider gear range capacity. Shadow RD offers a low profile design with single tension construction that prevents the derailleur from hitting the chainstay in rough riding conditions Direct Mount