Glen, about the time REBOXX faded from the model railroad supply chain, I decided to quit using a lot of the various factory supplied trucks, unless they were really specific to that car (such as the PRR trucks on Bowser cars)  This included a lot of the sprung trucks I originally wanted to change over to code 88 tread widths.  With the help of the members on this forum, I was converted to the idea that the sprung sideframe feature was not all that helpful and in fact became a real annoyance when one or more of the springs went missing somehow. 

I now standardize on Accurail and Tahoe Model Works trucks for nearly everything, with the few appropriate trucks that aren’t available from those manufacturers being supplied by Bowser, Kadee HGV and a few select others.  Having said that, I tend to leave the trucks on Rapido, Tangent and some Exact Rail models alone as they are generally of very high quality and readily accept semi-scale wheelsets from Intermountain and Tangent Scale models.  While many Atlas trucks are highly detailed, they are the most problematic in obtaining semi-scale wheelsets for as the factory supplied axles are considerably shorter than anyone else’s on the market.  As a result, many of them get replaced with one of the other manufacturer’s trucks mentioned previously.  The same is true of Kato trucks. 

Mark Rossiter         

Moloco notes the axle length is 1.005" on their Code 88 semi-scale wheelsets.

https://www.molocotrains.com/products/2088ni-pre-painted-33-inch-wheelsets-nickel-plated-insulated-and-painted-12-sets?variant=40243253674162

Eric Hansmann

Murfreesboro, TN