Thanks to those unforgiving sands of time, gone are the days when I could ride a 13-19 5 speed flush block up any incline. Nowadays a narrow 7 speed 13-28 is required especially as my chainset's smallest ring is 42T - but will my early 1970s Nuovo Record short cage rear mech handle it OK ? I'd rather find out before buying one, so guidance greatly appreciated ! And will a narrow 7 be OK on a 126 OLN Record rear hub ? Thanks chaps