arent big heads a classic wide? if thats the case they've had classic wides from the very first drop of the f4's back in 2013 i think
Xen posted on the last page the profile image:
https://www.slapmagazine.com/index.php?topic=68020.msg4210542#msg4210542Big head shape is only about 1 mm wider than the Classic shape overall in the same diameter wheels, so although that is the same for the smaller sizes in Formula Four Classic vs Classic Full, once it hits 56 mm, the Classic Full shape got a lot wider, almost like the Radial shape in 58 mm got a lot wider than the smaller sizes, by comparison. Sure it is only one or two mm here or there, but it still makes a big difference, as per all the requests for Radial Slims - that nicely squared off looking wheel with a round edge that gets on and off everything with just the right amount of grip to slip.
Classic Full sizes correct to 54mm from their backing sheet and measurements just taken again on wheels I have:
52 33 18
53 33.5 18.5
54 34 19
54.5 35 19.5
56 37 22.5
58 38 24
Thinking about the older era before Formula Four wheels, the funny thing is that bigger wider but still round shape of wheel was the number one shape through the original Spitfire wheel era in the 90s and 00s and I still have a lot of older "original" formula wheels in various sizes that were wider than the current wheels now, eg 56 x 36, 57 x 36.5, even 59 mm Bigheads used to be almost 40 mm wide, but now tap out around 37 mm in width, much like the Formula Four Classic 60 mm wheels.
I see they have also updated the Shapes page with Classic and Radial at the top now, not the Full shapes, which are at the bottom. Wondering if this is a sign of things to come, as in although they are still making and selling a lot of the wider wheels, just the normal Classic and Radial might be the main ones moving forward.
Of course Conical Full is still a very popular wheel shape, but the other Full shapes seem almost more just a trend, than a standard line.
https://www.spitfirewheels.com/wheel-shapes/