Hi I am looking at doing a wheel conversion on my Merlo P25.6 (2015) to take pneumatics off and upgrade to aperture tyres the current 12x16.5 tyres do a job but as I do a lot of hard work on concrete rough floors the current tyres don't stand up to it , I can swap to 33x12-20 semi solid aperture tyres but I am trying to locate a wheel drawing for the existing ones on the machine to check the conversion ones will fit and if they don't i can then get some wheels made to suit the new tyre size any ideas please ?