Hi all, still new here but pulled the trigger on a 2019 ridgeback expedition so have spent the day sorting bars, saddle, pedals etc. The question I have though, particularly to owners of said bike is, on the rear of the stem tube and under the top tube is a small round/pointed “nipple” for want of a better description. I’m wondering if anyone knows what it is. It looks like the stay you used to put an end of the pump in on old bikes, but there’s no “nipple” at the other end. Cheers.