One thing you will have to take into account with a 50mm larger tyre is the fact it will alter your speedo to read slower by up to 6kph at 100kph.
My Polo is 6 k fast and I worked it out that tyres 45mm larger would bring it nearly back to correct.

Also it is illegal to have a speedo that reads LESS than actual speed

Here is an excellent calculator to work it out Will also will show different offsets etc

https://www.rimsntires.com/specspro.jsp