fettler
Senior Retro Guru
I think they came out the year after my 88 red Courier (B52) I can remember all the different MF and other neon and crackle patterns hung on the wall in my local bike shop. About £45 a pair then IIRC? And you'd have to pay the man to remove your freewheel too. I fancied one for the cool factor but never bought one. Made from quite brittle plastic so by the time I'd saved up for one the local woods were covered in fragments of them everywhere so I realised they weren't much cop off road.