7-speed cassette & chain

[deejayen]

I dug out an old racing bike recently, and need to replace the chain and probably the cassette, but I can't remember the spec. I don't have the bike at hand to check, either.

It's a Peugeot, and probably dates from the late 1980's. It has a 7-speed Shimano 105 groupset, Biopace chainrings(!), indexed downtube shifters, and brake levers with concealed cables. I have a feeling it might be "HyperGlide".

I'm almost certain it will have a 130mm OLN rear hub and a cassette, but is it possible it predates that and has a screw-on freewheel etc?

It looks like 7-speed cassettes aren't exactly common nowadays! Any recommendations of what to buy, and from where?

Also, what's a good chain which would be compatible - something like the Wippermann 8SX?

 

[FishFright]

SJS are usaully my goto for such things

https://www.sjscycles.co.uk/cassettes-7-speed/

 

[deejayen]

Thanks! Yes they were the second place I looked (Spa was first). I'll probably go for the Acera (lots of the other options are out-of-stock).

 

[TheDoctor]

Once there aren't any more 7 speed cassettes, you can remove one sprocket and spacer from an 8 speed cassette. Get the indexing bang-on for the middle sprocket and it'll be 0.6mm out at either end, which the floating jockey wheel will cope with
Allegedly...