Any thoughts on this choice? I ran my last marathon in the ST2s and since then have done a fair amount of training (including 13 at MP)in the T4s -- I like them but worry that they might be too thin for the long haul in Chicago.
If every oz is worth 1 sec/mile, there is theoretically about a minute at stake here.
Forget the "every oz is worth 1 sec/mile" theory. What's it worth to have no blisters or cramping of your feet during the last 10k of a marathon? I have both ST2 and the T-4. I like the T-4's on the shorter stuff but I would never attempt a marathon in them. The ST2 has more support and comfort for the long haul.
I'd consider the Brooks T4 to be too light for a marathon, especially if you've not worn it for a 20+ mile run.
I'd second that and ad the caveat that the midsole of the T4 is a whole lot less supportive than the ST. Unless you are light on your feet, wearing a really light racing flat for 26.2 miles is not the best idea.
i love the t4, but when I ran the marathon in it it was a bit too light. Feeling every pebble for 26 miles kinda sux. Stick with the st.
I agree with the consensus...stick to the ST for the marathon. I use the same 2 racers and use the ST for 15K and over, T4 for 10K and under.
The T4 is not too light if you are accustomed to it. If you have not done a long run and/or a longer marathon paced workout in them, then stick to the ST.
I've trained every mile in both the T4 and ST. The T4 breaks down too easily. ST is too rigid for serious racing. If you've done a fair amount of running in the T4 I'd go with that. Try it on a long run first though.
Alan