ATC 70 chain question

[Hair Bear Bunch]

Hi, does anyone know what size chain fits a 70? ie- no. of links, pitch, ect.
Unfortunately the chain snapped going downhill, ran off the sprockets and we couldn't find it so we've not got a pattern.
thanks, Rob.

[Dangerous-UK]

Its a 420,not sure on links but a pit bike one is plenty long enough

[Hair Bear Bunch]

Thanks for that, I'll give it a go.

[KASEY]

all atc 70's have 72 links of #420 chain

[Hair Bear Bunch]

Cheers, now I can see what I can get. So, (pulling arorak on...) what does the 420 mean, 4mm wide x 20mm pitch perhaps? Just curious...!

[Dangerous-UK]

Not sure but 428 is the same size just a bit wider and has 8mm rollers