I just use the squishy rating. Press down with thumb, check that I can deflect the tyre a bit and ride off.
Just managed to fit 47c into my cross frame so may need to recalibrate my thumb
For off-road use. I'd say run as low as you can, without banging your rims when riding down concrete steps.
For off-road use. I'd say run as low as you can, without banging your rims when riding down concrete steps.
I actually do this^