Chain

[TheMcDay]

So my brother used WD-40 to lube my bike chain(I told him not to, he didn't listen) and my chain has significantly rusted. Which means new chain day! Problem is I don't know what chain I'm getting. I have an Apollo Outrider MTB 20'':Halfords page here

So yeah, what size chain should I get? Thanks in advance.

 

[Kies]

WD40 shouldn't result in significant rust on your chain. It is more than likely just surface rust on the outside. Why not try cleaning it properly and applying some proper chain lube?
Search tne technical section for the "mickle" method of chain cleaning.