I know from experience that the bike remains rideable, but uncomfortable after these bolts break. I had intended to bring a spare from Edinburgh, but forgot. It didn’t take me long to get the bolt in to almost the right place. There is a knack to getting the bolt right in to the end. I have found that putting the saddle over a kitchen chair and pressing down on both ends can force the leather up in the middle and allow the bolt to slip home, but we have no kitchen chairs on board. We like as many things as possible to be multi-purpose on board. It turns out that the tiller has a second function – saddle tension boat fitter.