Quick view Renthal 525 R4 Road - 130 Link Gold SRS Chain & Spring/Rivet Link MSRP: £187.10 Utilising Self Regulating Seal (SRS) Technology. SRS ring technology enhance chain flexibility and offers smoother operation than standard o-ring chains. All R4 SRS Road chains feature high alloy steel plates and pins, solid bushings and rollers, shot... Add to Wish List Add to My Wish List Create New Wish List