How to install rear rack & fenders on a vintage road bike How feasible is it to install a rear rack and fenders on common vintage road bike frames (e.g. Peugeot PX-8, Raleigh Record/Super Course etc.), and how can it be done, exactly?-- on my "true" randonneur from Motobecane (which is now sadly dead), the frame had eyelets to allow a rack to be installed:


However, on some other bikes, the rear rack is merely "clamped" onto the frame:


Considering that e.g. a Raleigh Super Course doesn't have eyelets for a rear rack, would it then be possible to install a rack via this latter "clamp" method? Would it be able to hold a proper amount of weight, e.g. 20kg? Likewise, how would one put fenders on such a bike (if this is indeed possible)?
Does this frame have mounting points down on the rear dropouts?  The sort  sometimes used for mudguards/fenders, which can be repurposed for the downshafts of a rack.  Since they hold most of the weight, a front mount is relatively lightly loaded.

I made a couple of clamps out of thin sheet metal for my rack, which wrap around the seat stays and bolt through the rack.

View from above
 

Looking backwards


Each bracket is a short strip of aluminium which is wrapped around the seat stay and then back on itself.  The bolt is a stainless steel one, and is (edit: should be!) double-nutted for vibration resistance.

Remember at least 2/3 of the weight is taken by the rear struts.  I've had a good 12-15 kilograms on this rack.   The black plastic is a substitute for a mudguard/fender, which does fine protecting my backside and bag, but does little to keep the bike and chain clean.