Lee_M
Guru
To answer the OP I have SPDs on my commuter and SPD SLs on my roadbike, mainly because I prefer to be able to walk after my commute and the SLs make that a bit harder without destroying my cleats
Both sets work fine, but if I was to choose a preference it would be the SLs, but can't say explicitly why, other than it 'feels' more secure
Both sets work fine, but if I was to choose a preference it would be the SLs, but can't say explicitly why, other than it 'feels' more secure