Let’s take a look at the statistics of diverse age rates ways of behavior from the States, GB and Germany.

According to the results of the “America’s Automotive IQ: Analyzing Automotive Knowledge in the U.S” survey conducted by Cheap Car Insurance, in 2016 among more than 2000 American drivers, 21.8% of them had no idea how to change a damaged tire. Fewer than half of the respondents (42.2%) answered that they were confident in their tire-changing skills. [source: https://www.nbcnews.com/business/consumer/draft-60-percent-people-can-t-change-flat-tire-most-n655501]. This is also confirmed by the results of the American Automobile Club (AAA) study. [source: https://newsroom.aaa.com/tag/flat-tire/].

Barely half of vehicle owners whose vehicles were equipped with a spare time were willing to use them in case of a flat tire. [source: https://www.edmunds.com/car-buying/the-disappearing-spare-tire.html]. In addition, a survey conducted on over 1,000 drivers in the United Kingdom by Leasing Options in 2016 showed that 55% of British drivers would not be able to change the tire of their car by themselves (in the 18-24 age bracket, up to 76% of respondents). According to the British Automotive Association (AA), tire problems are the second most common reason for calling roadside assistance in the UK (over 300,000 reports a year).
[source: http://www.thisismoney.co.uk/money/cars/article-3412299/More-half-drivers-t-change-wheel-need-to.html].

The situation in Germany is illustrated by the December 2016 results of a representative survey carried out by the Fors Institute of opinion research: only 54% of respondents declared that they know how to change a tire (80% of male and 28% of female respondents). [source: https://www.cosmosdirekt.de/veroeffentlichungen/autowartung-209712/].