I have a set of dark horse wheels. Absolute rubbish! I was looking to upgrade the wheels on my bike and didn`t see need to spend that extra on the more well known brands, as I just race my friends around town and had a budget that didn`t suit those price carbon wheels. Thinking of it now, I would have been better of spending that extra money. I`ve already had to buy a new rear rim (the new rim looks different to the front one, so they obviously had a problem) the spokes brake from time to time witch is very annoying! (and I am not heavy around 68kg). Unfortunately I`m in to deep already with these wheels and I am now married to them. And I can`t sh!# for them second hand. And as always there is the fine print that you never read.... so dark horse didn`t want do do a warranty. And yes, they do flex a lot.... The saying goes, you get what you pay for.... You be better of buying something ells.