This link tells how to fit a tele boot
http://www.nstelemark.com/NSTelemark/Te ... tting.html
There are several statements which directly address your fitting questions. The following is a quick summary of his procedure:
Step 1 - measure your foot in centimeters, which you have already done.
Step 2 - fit the shell. You want to be in the smallest shell you can get. Remove the liner and put your bare foot in the shell. You want about 1 cm between your heel and the back of the shell with your toes touching the front of the shell
Step 3 - fit the liner. Use a very thin sock - i.e. a liner sock not a thick ski sock - dress socks work too. If you have the right shell size, the liner will be tight before you thermo form it. Try on the liner outside the boot. It should be tight and your toes should be right at the end. Basically the boot fit and liner fit should be tight and borderline uncomfortable with the right size boot before you thermo form them.
There is a lot more on that website that you should probably read.
Note that he says to use a very thin sock. I now use very thin walking socks for skiing, NOT hiking socks. You do not need any extra thermal insulation and you certainly do not need any compressible cushion from hiking socks because that defeats the purpose of the thermofit liner. I sized my first boots using hiking socks and I will never do that again.
Note that he says the liner will be tight before you fit it. The new thermofit liners will compensate for a huge variation in foot shapes, e.g. foot volume, width, high arch, etc.
I did not have to thermo form the liners on my T2 Ecos. The warmth of my feet and the softness of the foam gave me a perfect fit after my first day of skiing, however, some people do find that they need to thermo form the liners to make the foam conform more quickly to the shape of their feet.
When you put the boots on, the first thing to do is to tighten the power strap as snug as you can get it. Then find a tooth that provides between zero and the tiniest bit of pressure for the toe and ankle buckles. Then tighten the instep wires with something between zero and the tiniest amount of pressure. Then do a run down a green slope and see if it feels as though your foot is moving around, e.g. does you heel lift inside the boot. Then make single tooth adjustments until you find a setting that holds your foot securely so that it does not move around. With a thermofit liner you do not need to crank down on the pressure at all; that will just impede the blood circulation in your feet and they well get cold and cramp up.
If you have a 30 shell and you measured your foot at 27.5 cm it is quite possible that the shell is too large. However, it is extremely difficult to measure your own feet with a ruler, so your 27.5 cm could easily be off. I was off by 1 cm when I thought I had done an accurate measurement with a ruler. Standing in bare feet on a shoe measuring platform with a heel cup to slide your foot back against and having someone else adjust the toe piece and read the scale while you remain standing upright is the only accurate way. Any shoe store will have one of the platforms for measuring your foot length.
Another website you should look at is
http://modernskiracing.com/Size.php
I absolutely love my T2 Ecos. You have made a good choice for your first boot. I wish I had known all of this back when I bought my first ski boots. Im sure you will be very happy with them after you get them fitted.
