Tire gluing is a common topic because it's hard to get it right! But, once you've got a routine down, you'll be cranking out perfectly glued tires every time. Check out some of the tips lower on the page that explain how to glue your tires so they never come off and so they look nice and neat (and you don't glue your fingers to them.)
Tire Glue Diameter (On-road racing)
In most cases, tire gluing doesn't affect handling, but in some cases it can. Some on-road RC drivers add extra glue around the tire's sidewall, from the rim out to a diameter (tire glue diameter) they choose. They then use a tire truer to remove any glue beyond that diameter.
This has the effect of making the tire's sidewall stiffer and preventing it from folding over, thereby generating more traction. Not many setup sheets have a field for glue diameter, but So Dialed setups for on-road cars do include it, so drivers can record the diameter they used and use it for testing and tuning.