@spotter put me onto those and I used them for dynamo runs across my frame. Under a mudguard? Not so sure unless you had good clearance as they do stand quite proud. Long term I would be concerned about their adhesion to the guard due to grit/water/squirrels. Most solutions I have seen elsewhere for running under mudguards tends to be hot glue gun / airfix glue based solutions that permafix the wire.
@spotter put me onto those and I used them for dynamo runs across my frame. Under a mudguard? Not so sure unless you had good clearance as they do stand quite proud. Long term I would be concerned about their adhesion to the guard due to grit/water/squirrels. Most solutions I have seen elsewhere for running under mudguards tends to be hot glue gun / airfix glue based solutions that permafix the wire.