Very nonstandard question: Is there any way to widen a tire by combining it with some other tire (cut and re-glue)?
I don't think what what you are proposing to construct would not be anywhere near strong enough to function properly as a tire.

Tires are not just molded rubber. They are contain a casing of continuous fibers that enables then to withstand inflation pressures and lateral forces caused by cornering.

https://en.wikipedia.org/wiki/Bicycle_tire#Construction

By gluing parts of two tires together you would not have a continuous casing running through the tire.