In a word No
Back in the days when engineers designed things they would design a belt run that used a standard size belt because they are cheaper for them to buy and it just makes good engineering sense .
Now days risk adverse accountants with computers design mowers and all of the belt makers have nice drop in spread sheets to work out the OPTIMUM belt length .
So they drop in the pulley sizes distances between centres , loads , linnear & rotational speeds and as if by magic out pops 292.012345" so that is what they order .
IF the belts cause problems then they blame the belt makers
What does every person under 45 say the instant they open their mouth ?
"It's not my fault,,,,,,"