Chains and Sprockets

[Volvi]

OEM? and you got 40K???, thats a record the oem is really quite junky of a chain, stretches to buggary and if its 40k it shud be well and trully rooted by now, most last 30k MAX. Replacement? you cant go better imho then DID ZVM2 as on bottom of page here; www.didchain.com/xring1.htm

Sprocket? well drag racers will no doubt give theyre experienced based opinions but I have for road a Supervox Stealth (43t) steel outer rim, alum. inner. as here;
www.supersprox.cz/stealth.php?lng=en <i></i>