If its an improvement on current gear in terms of performance, cost, reliability and longevity, it has every right to succeed. How many trends promise all that though, not many. Apart from tyres, I rarely hear mention of the last one, manufacturers would obviously prefer us to buy more often.
Press fit bottom brackets is a classic case of something led by the industry, that as far as I can see only offered benefits for the manufacturer. For the user it was maybe a tiny bit lighter but not enough to make any difference. It was surely cheaper and easier for carbon frame moulds for manufacturers, and I guess cheaper to manufacture the BB itself as it needs less variants, but that didn't go well at all. As far as I could see they didn't offer any of the 4 benefits I look out for, and I don't expect we'll see high prices for them on
ebay in the near or distant future.
Taking out the obvious crazy outlier listings, and the premium priced all new shiny bells and whistles things, I think ebay prices give you a good idea of what people
really think, real market prices. I've not got the tech skills to do it, but I'm sure doing some analysis of components and accessories that have been released over the last 20 years, and checking ebay prices of them, would make some interesting reading on what's been hot and what's not, and I bet the 'hots' are not the ones that have been 'pushed/advertised' the most.
I think manufacturers could learn a lot from doing such research and not just concentrating on shifting volume. Haven't Jaguar recently started remaking modern versions of their old classic XKSS because second values of the original cars were going for such huge money, Jaguar figured there's probably more profit margins than their new cars and they may as well cash in and start making them again.
Us cyclists are a varied bunch, and try lots of stuff. With the existence of forums like this, we share our experiences and recommend stuff. I am far more likely to buy something on the recommendation of a friend or someone that has actually used it over time, than by what some manufacturer claims, but maybe that's because I'm a middle aged cynic
