I dont know about you or where you get your spark plugs from but I almost always have to re-gap them, But I get what your saying. Other than being gapped at .060 there is nothing different with the TR55s and they do the job well just like the TR5. On another note I ran mine at .050-.055 IIRC.wrong gap right out of the box. Gapped at .060
The TR5 is THE SAME heat range, gapped correctly out of the box.
You could get them (for the same price as TR5) and regap them...no idea why anyone would want to do that - unless they were out of TR5s.