I have owned one of the first BF Pocket Rockets since 1995ish. If what BF told me is true when I bought it preowned it is frame number 2. I have updated it some over the years and still have not found a reason to buy a new frame. One of the good things about BFs is they use normal off the shelf parts. They also will build a frame that is custom fit for you. In my case I was going to buy a new one and the sales person said they had the preused frame in my size for a bit less money which I bought. It still has the original 451 24 spoke wheels with Shimano 36 hole hubs and Sun MA14 rims. The wheels are light and have been bomb proof. My riding weight is about 200 pounds. Other components have been replaced with newer stuff and I even bolted on dual pivot brakes. Most of the components have been Shimano Ultegra/600 level. Tires have been many over the years in the 451-28 size. I don't think any one tire has been better than another. BF still has the pre owned program so you can always call and see what is available. Roger