Nice of you to make such assumptions and accusations without even seeing the rim' date=' eh...? If you knew anything about bicycle wheels you'd know that a rim can have a very slight flat spot that can be seen with the naked eye when you spin the wheel and look at it from the side. If it's perhaps 1 or 2mm it will be quite clearly visible but WILL NOT affect the braking performance or feel or strength of the wheels. In such cases the wheel can still be used and it will in most cases not in any way affect the longevity of the wheel. At the same time, yes, in certain instances it can affect performance. Right now however, I'm going to go with the opinion of a shop mechanic who has actually seen these wheels and could've made some money by convincing the owner to replace the rim....but didn't How many times have guys come onto the Hub and complained of shops telling them to replace parts in order to make an extra sale when the truth is that the component could very easily still have served the owner for a long time. Here we're faced with a mechanic that tells his customer not to worry as it's fine and we then we get some internet wise-ass tell the owner that said mechanic is a chop....without having seen the wheel himself....?! Get a life turtlek! To the original poster, the most drastic step I'd tell you to take now is to get a 2nd and/or 3rd opinion. I've ridden 'flat spots' for years on some rims without a single problem! [/quote'] Mintsauce yes fair enough assumptions and accustations are a very good cause for your post but with the term "Smashed" used in his first post that makes me post from my personal experience i have also gone through minor potholes on my road bike and then gone home and realised that my rim has mushroomed from that pothole and then i have also smashed my rim into a pothole at close on 50km\h which caused a bigger mushroom on the rim and a very bad flat spot aluminium is not a very hard metal and when it comes into contact with something very abruptly it causes deformities especially with this kind of impact it will not only cause a flat spot but also a bulge or an indent how can you not feel a difference in a rim that has a flat spot it causes the rim to be closer to the brake pads that the other parts of the rim which in riding makes the brakes hop on the rim no matter how big or small the flat spot is which in turn wears the brake pads down and makes for a very uncomfortable ride when you pull brakes so yes i was wrong by making assumptions based on what he said but where did he say anything about length or size of the flat spot?????????