I have the OEM ones on mine and I find them useless when extended (flipped) into 'tow mode'. I find they work pretty good as is. They might be wider due to it having duallies and with the convex mirror in the outside corner of the big mirror I can see fine down both sides of my 5th whl. I tried them flipped out in 'tow mode' and everything felt 'off' with limited view. I applaud you using something over nothing. It is really frustrating when you're behind someone that has no clue your back there and they're going 30mph in a 55 zone and fail to use the 'slow pull offs' despite a long string of cars behind them because they're oblivious. SUV's with Air Stream trailers comes to mind. Anyway, there are lots of good options out there with a little searching and I'm sure others will point them out for you. Good luck,