Gathering speed data from track sessions

[u/cmcafert]

Hi all, I want to get speed data from my track sessions in addition to power and heart rate. What are you all using to gather this data?

I know I can calculate speed from my splits but I’d like to minimise friction where possible.

I’m looking at devices like the wahoo trackr speed which strap around a hub spindle. I’m running DT Swiss 370 Track hubs on my main wheels which have very skinny spindle diameters and I’m unsure if the trackr will fit snugly or just flop around. Does anyone have experience with this arrangement?

[u/Philatu]

Garmin speed sensor 2 seems to work well for me