If press fit BB's in bikes was done to normal industrial engineering standards, it would be fine - apart from the nuisance factor of DIY replacement.
The reason it's an utterly shite idea on bikes is entirely down to the cost-cutting bean-counting cowboys who control the mass market industry. Instead of building their frames to the correct tolerances, they produce the lowest grade crap they can get away with making, in whatever far east factory offers them the lowest unit price and the biggest profit margin. That includes a lot of supposedly high end stuff as well.
They only get away with it because the cyclists who come on forums moaning about press fit BB problems are still gullible enough to go out and buy yet another bike with a PF BB, even though they got burnt the last time. If you keep buying this shite, the manufacturers will keep making it. if you boycott all bikes with shite tolerance PF designs and refuse to buy them, then they'll either have to sort out their manufacturing QC or go back to threaded BBs. None of my bikes have PF and I won't be buying anything with PF either.
This in spades, as was pointed out go to you tube and watch some Hambini videos, and keep the volume down at first for the initial HELLO HAMBINI FANS!!!!!, and a warning that his language can be a bit, er, fruity to say the least, there are very few frames that get away from a Hambini roasting, the tolerances for BB's are, frankly shocking, and not just pressfit either, the build tolerances are terrible on some very expensive & well known frames, but he will praise good frames to the hilt when he comes across them, on one Open Upper (Gravel Frame) he actually said it was a death trap and wouldn't ride it due to voids in the carbon of the chain stay/BB area, now this isn't some you tuber bad mouthing things, he's a real engineer, that knows his stuff, and does sort out customers frames that really are bin material, he knows what he's talking about, I think the previous owner of Cervelo, Now current owner of OPEN, has threatened to sue him, funnily enough they never do, I think he would turn them inside out and back to front in court and, they know it.
He produces his own BB's they are expensive, and I'm sure some World Tour teams actually use his products.
