Originally Posted by
kite991
And comparing the Kilo tt to the Leader, on BD it says that the 47cm Kilo is an equivilent to a 50cm bike so the 51 probably would be best.
Wowe wowe wowe Kite991. A couple things you need to be keeping in mind. Firstly, you should probably decide on whether you're guying to trust the new fit calculator measurements or trust how you fit on your size 47 kilo tt. Your Kilo TT size 47 has a top tube of 513. On the other hand, your fit calculator puts you in the range of 540-550ish or 560 on the longer side. 513 vs. even 540 seems to me to be a huuuuge difference, don't you think? You may have just got the wrong size Kilo TT (but only you know that in the end). If it does fit you perfectly, and you're going by your kilo tt sizing, you should be on a 46 Leader 725. If you're going by your new fit calculator measurements you should be on either a 51 or maybe a 53. Secondly, BD saying that 47 is equivalent to a 50cm bike means pretty much nothing especially when it comes to leaders. As I said yesterday, the leader 721/725/735 have quite long top tubes for their labelled size. A 'normal' (if there is even such a thing) size 51 frame would have a shorter top tube than Leader 721/725/735 size 51. Don't make your decision governed by the size labels of the bike; look at the actual geometry of the frame.