As for the rear, if I remember correctly, F2 is 4.5 inch wide and designed to run a 160 tire. F3 comes in 2 different widths, 5 and 5.5. Stock F3 rear tire was a 170, I use a 5.5 and a 180, race rubber is much more common in a 180.
For the front wheel, it is alost the same, but F2 uses 280mm rotors where the F3 uses 320mm full floating rotors. Can not interchange rotors between the wheels. And the fork lowers (and internals even tho the tubes are the same) are different to accomadate the larger rotors.
I put F3 rear 5.5 and front wheel/forks brakes on my F2. Coming down the front stretch at PIR at 140 into a 60mph first turn the difference in braking is much better.
I have all the F2 stuff left over and would like to put later cast wheels and front forks on my 550. I have the parts, dont care if I fit in a class, just want to do some laps on the 550. I realy like the looks of spoked wheels on a vintage bike but the cost of new hoops and spokes on my existings hubs is not in the budget.
