Thank you for the answers. Nice TT bikes you have and your old 1993 TT bike in the photo is looks very interesting bike. I am new in TT bike i have buy one 2003 year made is Quintana Roo Tequilo. I have ride only once when i buy test ride i buy used and the bottom bracket had some play need replace i think. The crank is 53/39 and have 9 speeds cassette 12-25.The wheels is mavic cxp-10. How is looks that setup i leave the bike as is and put new bottom bracket? I have wheels fulcrum racing T i was think put in the TT bike or is better i leave the mavic wheels i not race but i love to ride. Is my first TT bike for some reason i do like TT bikes much more than road bikes. 11-28 9 speeds cassette is have big gaps between gears? i mean if used in flat terrain but in hills too? when you swap cassettes you use the same chain? or need different chain length each cassette? I have one steel road bike i do sprint in flat bike trail i do max speed 27 miles that is sounds low? I have this time 53/39 crank and 12-25 cassette. i tried go 30 miles max speed but i could.