Caterpillar 793F mining truck
This is what the tyres are for.
A 25 to 1 scale model of the 793F mining truck, finished length 548mm,actual length of truck 13.7 metres,load capacity 250 tonnes.
Measurements etc are from Caterpillar web site, no drawings of any parts are available, so the construction is how I read the specifications.
The motor is a V16, 85 litre with four turbocharges. Just about everything is hydraulic ,front and rear suspension,steering, tipping body etc, total oil required 3212 litres, fuel tank 4922 L. cheers for now John.