By into the steerer tube, do you mean past the threads? I was planning on using a Nitto Technomic that's pretty long, but I'd been hoping to find an even longer stem (or one with a shorter threaded length) so I could have more of the stem exposed. This is a mtb to drop bar conversion, which works best if you use a size or two smaller frame and then a tall stem and seatpost to make up for the fact that the top tube is long relative to the seat tube (in my case it's a 22" C-C seat tube and a 23" C-C top tube with a really long seat tube). Previously I used a Soma Hi-rise threaded to threadless adaptor to get the bars high enough to work, but I'd like to use a threadless stem like my nitto if I can make it work because I think it just looks prettier.