This 35º drop threadless stem – made because Planet X sponsored rider Ian Cammish asked for it – does the same as the dropped quill stems of yesteryear: it lowers your bars. Compared with a ﬂipped 10º stem, this put the bars about 4cm lower.
If you want to time trial faster, the important thing to sort out is your riding position. While there’s a trade off between power and aerodynamics, most of us could afford to ﬂatten our backs by getting lower.
It’s available in 80-130mm lengths for 25.4mm bars, the 100mm one weighing 166g.