* What model John Deere G are you referring to? There are many John Deere G models, each with its own production run and variations.
* What exactly do you mean by "wide front end"? Are you referring to a specific type of axle configuration, a specific set of tires, or a specific model variation?
* What is your definition of "rare"? Rarity can be subjective. A tractor might be considered rare in one region but common in another.
To get a better idea of the rarity of a specific John Deere G wide front end, you need to provide more information:
* The specific model number of the John Deere G tractor.
* Detailed description of the "wide front end" you are interested in.
* The region or timeframe you are interested in.
Once you provide this information, it will be easier to assess whether the specific John Deere G wide front end you are interested in is considered rare.