Note that the inch-based designations sometimes express the width in a decimal (26 x 1.75) and sometimes as a common fraction (26 x 1 3/4). This is the most common cause of mismatches. Although these size designations are mathematically equal, they refer to different size tires, which are NOT interchangeable.
Stomach bloating may at times occur immediately after a meal, within minutes or in rare cases while eating. The most common cause for this is due to air swallowing (aerophagia) or consuming carbonated drinks. In both these cases, it can be avoided to a large extent.
A Pain and bloating after eating can be due to various causes including indigestion, ulcers or intolerance to certain foods. So if your symptoms persist, you should seek medical advice. But eating while you are anxious or stressed reduces the supply of blood to your stomach and makes digestion more difficult.