I am ready to ****ing EXPLODE. ARGGGHHH the rims on my track bike are IMPOSSIBLE to get tires on and off of. I have already broken two tire levers and I've NEVER had this much trouble with tires before. I just got them mounted and then noticed that the valve in the rear one wouldn't hold air. So now I have to take the ****ing things off again. And I only have one tire lever left. This is unfriggenbelievable. I haven't been this frustrated in like ever!!!$%$! Wow... I feel surprisingly a lot better after the above rant . Thankyou. I love you all.