The bike stays secure, by virtue of its design; the wheels do not move. Im not judging the headphones too much on the sound quality or battery life. I ordered the mens size 6 which is the equivalent to a womans size 8. Wish they had more color options for us heavier gals, but the royal blue w/ black is beautiful. The parts bag wasnt sealed and I only ended up with 2 long screws and one short top screw, so half the parts had fallen out of the beat up and torn open box somewhere along the way. I tried using vaseline to make it better. I bought 2 of them because Im really not kidding about the amount of spices I have ??. My table saw is almost hugging the dust collector, and the hose is stretched to the limit. I eventually got around to cleaning out the port and ruled that out as an issue. FITSome reviewers were complaing about the front flopping or getting stuck, which is another reason I almost skipped this purchase.