hi all been looking at wheels and tyres for what seems like forever and still unsure, looking to build my first heavy will be 2 wheel drive at rear, front mounted axe and hopefully some kind of grabbing jaws

2x high power scooter motors, 2 in consideration 750w and 100w both 36v, similar too tomahawks motors

wheels gearing should not be a problem as i am planning to use t8f chain which is used on small mopeds and large electric scooters etc has a good load capacity for size of around 670 lbs depending on grade.

here in lies the problem,
go kart wheels - wide lots of grip, heavy and requires lots of work to fit
10 inch faom filled barrow wheel - easy to fit and cheap, narrow tread ,plastic hub weak large od
heavy grade castors - cheap , strong, easy to fit, narrow tread

any ideas greatly welcome
thanks adam