Upon receipt of the package, positive first impression, 5 beautiful wheels of good quality. After opening the bag, surprise, they brake not ... I expected after reading the reviews, good well we'll see what happens. Very simple assembly, 11mm diameter rod. First test: waaaaaa it rolls ..... great !!!!! and very little noise !!! So, on the brakes, my chair was relatively heavy, it is not completely blocked, it can still run with no one on it and in fact, the small brake is practical. The wheel diameter is larger than usual, 65mm and this is also great, more fluid despite the uneven ground. No fairing, the old wheels had, suddenly it changes a little design that I find even more fun, more sleek and modern. Bought it a month ago, I drive throughout the house (yes, that is my only means of transportation, so a chair that has kilometers on the clock), and frankly, I am satisfied. A buy without hesitation !!!