Yes, narrower wheels on those. Many older ones had a low rib tire on them, pretty heavy. Speedex used Bushings most times and not bearings. Bearings of others don't fit, because Speedex used 1" axles. Wheel still has 1-3/8" center for common bearings, but can't find them in 1" centers, not enough material I guess to make rollers in there? Speaking of rollers, I have even had same wheels with a wheel width needle roller in them. All busted up, so out they went and got bushings. Harder to find the bushings with a lip on then and even then, not enough room on axles to put two in wheel with the lip. I've had to get two with lips and two w/out and use the non-lipped inside on some of mine. McMaster-Carr has those in many metal types, hi or low dollar. I have parts tractors that I don't wish to split up that still have some of those wheels on them. Later years/models have the modern wide tires, just like yours shown, so they DO work. Check out some of my pictures on here to see what they look like. Most of mine are newer models tho. I put tri-ribs on my 1240 on the stock wheels, looks OK.