I was looking at spikes for the upcoming season and had difficulty finding spikes that could be used for the 400m. I run the 400 and only the 400m and not many shoes are advertised to be used in 400m only but there are two pairs that I feel I could use
Adidas AdiZero Prime Accelerator
TFX SPRINT V4
http://us.puma.com/en_US/pd/tfx-sprint-v4-mens-track-spikes/pna887121454130.html
Feedback is very welcome