l got a pair of cross country skis from a thrift shop. The bindings say only ''Trak''. There is 3 pins on the bottom and a top part that snaps down (but different than your normal 3-pin...it is more narrow and pointy, so my 3 pin boot does not fit in far enough to clip in).

What is the name for this kind of binding? I'd like to find a pair of boots to fit it.
Thanks!

This sounds like an old Rottafella set up. Any pair of boots that will fit into the toe piece should work. A hollow insert is used to align the boot over the pin. When l last used this style they were becoming a less popular system and this was about 35 years ago. Check with your local shop who do Xcntry race and some back country terrain work.

For years (decades?) the ''Nordic Norm'' 3-pin bindings were 75mm wide & that is what u mostly see on older skis. However, for a few years in the late 70 is early 80 is there was also a 50mm 3-pin system ( l used it for a while.) It looks identical to 75mm Nordic Norm but skinnier. Far as l know, nobody makes that configuration of binding or boots anymore. Your 75mm boots will not fit (as you've noticed) & u will have a great deal of trouble ever finding boots that will fit those bindings so l would recommend u replace the bindings on the skis with a pair of 75mm. The mounting holes r the same so just back out the screws (if the screws were glued in by the original mounter, heat them carefully with a soldering gun & they should come out.)

Check the woodenskis.com website for sources of the old 3-pin bindings if the ski shops do not stock them any more or look on Craigslist in ur area to see if anyone has an old pair. They r usually available for $10 to $20 -- far cheaper than new boots. When l converted all my skis over to more modern boots & bindings (SNS mostly) l gave away all the 75mm hardware so there must be others doing the same. People kind of look at me funny since l prefer 30 to 40 year old waxable wooden skis (my faves r Madshus Birkebeiners & steel-edged Bonna 2400's) but have these high-tech modern bindings & ''space jockey'' looking rear-entry boots but the combo works. If u do a lot of skiing u may want to eventually consider going with the newer bindings/boots. You will get more speed & greater comfort skiing with them than with the old 75mm stuff.

Happy trails!