It's wide enough.. because a sit down mower will fit. If you're not convinced go to local home Depot and measurements of their display. If they have one

Absolute NIGHTMARE with the window gaskets. Either the gasket tubing needs some type of adhesive so ti stays in the groove or, the channel groove in the door frame needs to be deeper. It took me longer than an hour for the doors as the rubber gasket kept popping out while trying to insert the rest. After that disaster, having to make sure the gasket stays in while also trying to line up the screws with the holes in the fake window panel was another nightmare because you can't see that they're lined up before tightening. It's like assembling while being blindfolded.

Use silicone to hold it in place