Got some stage 4's (the 8.3ish ones) and skated them flat-ground for the first time recently. They definitely feel more surfy than stage 11's (especially with those soft 90a red bushings) with some additional differences between the two. I did minor measurements (I don't have the specific #'s anymore) and saw that they do bring in the wheel base a bit more than 11's, and the height seemed more like 53mm as opposed to 55mm. I had them paired with a g052 chocolate shape, which has a longer tail/nose, so skating them on this board kind of felt like I was skating low trucks since the geometry of the setup led to quicker pop. I didn't mind it. Though, I kind of lost my nollie flips since the nose is nearly 6.9" in, making the pop way too mellow for me. My wheels are prolly 50mm, so I think I would have to jump to 53 or 54mm to remedy this. Stage 4's come in at over 400g, but I honestly didn't really notice the heft all that much when trying flips tricks. It was pretty cool, though. They have a great look and I love how newer equipment like this can really inspire you to skate more.