Change the Tyre Puzzle

Change the tyre puzzle

A motorist while changing a tyre of his car, accidentally dropped all four wheel nuts into a sewer. Tried his level best to retrieve the nuts but to his disappointment – he failed.
Annoyed, he started to suspect that he will have to spend the night or hours to figure out the solution. A gentleman passing by saw the whole episode and asked his problem. To the motorist surprise, he immediately offered a solution.Motorist was soon on his way to the nearest service station driving his car after fitting the tyre safely.
What was the advice that the gentleman had given to the motorist?