It never really was an issue. Been running british ever since and no problems. Italian bike makers sold most of their goods in Italy; French makers concentrated on French customers and British makers made bikes for their home market. Apply this only to the threads. But it was the typical Ita bb problem. There are some exceptions to the ISO.
Ceramic bearings have made quite a splash in the high-end market recently as a lighter, stronger, and smoother alternative to steel ball bearings. Bottom bracket technology will be a constantly evolving area, and we are most likely rather far from developing a lasting standard. Some manufacturers make cranks and bottom brackets to both specifications. For example, a crankset made specifically for BB30 will not fit in a BB86 bottom bracket and frame. Their BB axle has a single flat at each end and a tapered flat-sided pin was wedged in against the flat. Many experts in the industry see a bright future for BB30 systems, as they are the stiffest and lightest to hit the market thus far, and perhaps more importantly, the technology is equally available to every company, making it a good contender for worldwide acceptance. Pressed in standards usually require two-piece cranksets where the spindle is attached to one of the crankarms.
italian thread bottom bracket | eBay
The chainrings and pedals attach to the cranks. There was one bottom bracket design, and it was strong, durable, and easy to service. The distinction is based on whether the unit is stationary, as in a hub, or rotates, as in a bottom bracket. BB30 has a 30mm spindle.
Description: In typical modern bikes, the bottom bracket spindle is separate from the cranks. The crank had intricately CNC machined wide hollow crank arms made of two halves glued together. Many experts in the industry see a bright future for BB30 systems, as they are the stiffest and lightest to hit the market thus far, and perhaps more importantly, the technology is equally available to every company, making it a good contender for worldwide acceptance. Recently, the loose-bearing system is largely being phased out in favor of another system, known as the cartridge bottom bracket. There is some disagreement as to whether the word axle or spindle should be used in particular contexts.