Originally Posted by
Geo_Zegarra2016
Does anyone know if Garmin Rally XC200 is the only power meter for MTB shoes?
Pretty much, yeah. There's also the SRM X-Power SPD pedals but they cost a LOAD more.
You could go down the Assioma SPD hack/bodge route, but the Rallys are I think the only off-the-shelf option worth considering.