Polo eBay finds/marketplace

I would say stay away, unless you're running a granny ring.

It's a bmx hub so your chain line will be off by 5mm compared to track hubs. Running these on a polo setup would mean a chain line that's about 8-10mm out, depending on type of cranks, inner/outer chainring placement, bb and/or freewheel spacers (yep, you can use your external bb spacers to push out your freewheel). Or you would need to respace the hub then rebuild the wheel and dish the non drive side.

Too much hassle tbh.

@gponx has 48h rims at €20 a pop and hubs (front disc, rear cassette 135mm, rear 120 freewheel) at a bargain price too (sorry can't remember), get them instead and build your own wheel - bargain! Only thing is to replace the original nuts with proper track nuts (only a couple of quid on the bay).