But not the metal loop of left stay, metal bridge, right stay. If you jam that against the tire at the crown you can have a real problem. A breakaway some place is a good idea.
I saw it happen 18 months ago on a local club ride. There was a loud crack and bits of mudguard went everywhere. We waited 10 minutes while the rider removed the stays and plastic remains (which are still in a nearby hedge - well, how would he carry them?) Conceivably a stick of the right size could jam against the stay, but the problem is most serious with metal guards such as Salmon.
FWIW, my touring bike has the stays mounted about 1/3 of the way up the fork. This is supposed to reduce the risk.
But not the metal loop of left stay, metal bridge, right stay. If you jam that against the tire at the crown you can have a real problem. A breakaway some place is a good idea.
I saw it happen 18 months ago on a local club ride. There was a loud crack and bits of mudguard went everywhere. We waited 10 minutes while the rider removed the stays and plastic remains (which are still in a nearby hedge - well, how would he carry them?) Conceivably a stick of the right size could jam against the stay, but the problem is most serious with metal guards such as Salmon.
FWIW, my touring bike has the stays mounted about 1/3 of the way up the fork. This is supposed to reduce the risk.
I saw it happen 18 months ago on a local club ride. There was a loud crack and bits of mudguard went everywhere. We waited 10 minutes while the rider removed the stays and plastic remains (which are still in a nearby hedge - well, how would he carry them?)...
Fasten the pieces to the bicycle with electrical tape?
WHAT! YOU DON'T CARRY A ROLL OF ELECTRICAL TAPE WHEN CYCLING?
Okay, now that I've grasped this concept that fenders can easily become part of a jammed front wheel launch vehicle type problem....
This breakaway thing. Seems that more than a little thought needs to be put into just what exactly is going to break away and what's going to be solid. Simply mounting the thing with nylon bolts or cable ties may only increase the frequency with which it tries to jam the tire. IOW debris that might only have slightly jammed a solidly mounted fender, may cause the breakaway piece and it's struts to get swallowed by the fork crown which then chokes.
I don't recall classic british roadsters having that sort of problem. And there were a hell of a lot of them.
Ron
But classic British steel mudguards with solid bar struts can't fold under to engage the tread to start with. At least not without a heck of a lot of pressure. They're formidable compared to nylon or aluminum mudguards with wire braces.
-- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971
Okay, now that I've grasped this concept that fenders can easily become part of a jammed front wheel launch vehicle type problem....
This breakaway thing. Seems that more than a little thought needs to be put into just what exactly is going to break away and what's going to be solid. Simply mounting the thing with nylon bolts or cable ties may only increase the frequency with which it tries to jam the tire. IOW debris that might only have slightly jammed a solidly mounted fender, may cause the breakaway piece and it's struts to get swallowed by the fork crown which then chokes.
I don't recall classic british roadsters having that sort of problem. And there were a hell of a lot of them.
Ron
But classic British steel mudguards with solid bar struts can't fold under to engage the tread to start with. At least not without a heck of a lot of pressure. They're formidable compared to nylon or aluminum mudguards with wire braces.
Gotcha.
Yeah, there's a fender strength / geometry problem to be solved here. Good thing I read this stuff. I've been considering fenders for a bike and now realize it'll take a bit more thought implementing than I'd considered.
Help me out here. I'm having a hard time vidying what you'd ride over, into or pick up on the tire that requires the breakaway fender. At least what wouldn't be causing trouble already. Or that you'd hit with enough speed that it wouldn't just be a minor nuisance. I could see branches and such being an issue, but we usually aren't going fast enough over them that they'd do more than add drag until getting ridden off.
I've seen a chunk of wood catch in my wife's front fender, break the fender and cause the saftey release stay mounts to do their job.
