snip>> Although they were very effective in clearing debris from the tyres the mudguard type were found to be a potential hazard as they would sometimes buckle up and jam the wheel causing breakage or even worse a spill. I still have some of these in my collection and decided for the purpose of my safety thats were they will stay! <<snip
If the tire savers were mounted forward of the fender/ brake, they would not fold under the fender/ fork crown/stay bridge. That's what i did years ago. If there was enough clearance between the caliper and tire I'd fix them 'backwards' from the fixing nuts and if there wasn't, I'd mount them off the acorn nut on the front. It seemed to be a good idea to an 11 year old kid back then.