https://www.caseih.com/emea/en-gb/products/tractors/magnum-series/magnum Don't see any flange axles here

or here http://startintractors.co.uk/category/vehicles/used-tractors

There is the odd flange axle Magnum about, but not many. These tractors only ever get used for hard work, so I'd expect them to be able to pull on wide singles as they've been doing it since new.