CHO (Cyclic Harvesting Operation)
The load on the combine's axles changes more than twofold during the filling and emptying of the grain container. Tyres are labeled with CHO (Cyclic Harvesting Operation) are able to carry this extra weight at speeds of up to 10 or 15 km/h (depending on tyre type) without increasing in inflation pressure in contradistinction from standard combine tyres. This feature of CHO tyres guarantees better ground care and extends the harvest season even into periods of bad weather when the ground is wet.
CHO (Cyclic Harvesting Operation) = CFO (Cyclic Field Operation)