There have been many debates amongst fans of the biscuit about its size. Wagon Wheels have supposedly shrunk in size over time, but Burton's Foods Ltd has denied this. ... This caused the overall diameter of the biscuit to shrink slightly, but not as much as fans of the biscuit believe.

When did Wagon Wheels get smaller?

you might remember the Wagon Wheels of the 80s or before. Sometime during the 80s they saw their first reduction from a 79mm width to a 74mm width. Following this, they shrunk again sometime between their 2006 weight of 41g and today's weight of 36g.

Why were Wagon Wheels so narrow?

Also, the front wheels on covered wagons were often smaller than the rear wheels. ... The more rocks a wagon was likely to encounter, the larger the wheels needed to be. If a wagon wheel had a diameter of four feet, then it conceivably could get over rocks that are one foot in diameter.