I have a Raliegh Technium Road bike. This is a PARTIALLY aluminum frame that is lugged and bonded together. According to my magnet, the only pieces that are aluminum on the frame are the Seat Tube, Top TUbe and Downtube. The rest is steel(CRMO I assume) It has a 126mm dropout spacing.
Can I safely move up to a 130mm rear hub? Can/should I stretch the spacing, or should I just wedge a wider hub/wheelset into the rear. What is generally recommended - especially on a bike that is bonded, rather than welded together.
Thanks in advance.