I got the wheels today. from
www.northerntoolsuk.com ( I'm not used to such fast service)
Anyway they have solid tyres which means no more punctures
and they are 16'' high and they fit. mind you the spindle could do with being 1/2'' longer.
I loaded it up and took it out for a test drive, the pavements and kerbs outside my house, it worked perfectly, going up and down without the undercarrage smashing onto the ground or me lifting it up the kerbs.
The next test was to take it off road, as the houses I mainly clean, are terrace houses and getting to the back, means I normally have to go over all kinds of rubble and rubbish. So off I went to a local building site and there I was like going up and over every obstacle without any problems
mind you the builders looking on thought I was mad :-/
The total cost including delivery was £36.17p.
So for anyone who has peters trolley and you want to improve it's performance then I recomend that you fit these wheels.