RIEJU MRT PRO/PEUGEOT XR7/XP7/NK7/XPS - BLACK (X2) (ref: 500947)

The Doppler chain tensioners are made of anodised CNC aluminium, which mount in place of the original ones. It's the finishing detail to your personalisation. They were made for allowing the sockets passage for tightening. The MRT and BETA models have graduation for a perfect chain alignment. They have a laser engraving.