Brooks Saddles have a tensioning bolt at the nose of the saddle. During the break in process you might need to tighten the bolt and stretch the saddle 1/2 turn for every 500 miles of riding. Usually after 3 turns (3 threads showing) and 3,000 miles the saddle tension is pretty stable for a while.

How do you tighten a Brooks leather saddle?

0:501:29BROOKS ENGLAND - Leather Saddle Maintenance & Care - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd longevity to tension use the Brooks tensioning spanner provided. Turn the tensioning nut locatedMoreAnd longevity to tension use the Brooks tensioning spanner provided. Turn the tensioning nut located in the nose of the saddle clockwise a quarter turn at a time until you find the desired tension.

How comfortable is a Brooks saddle?

Is it comfortable? Surprisingly, it is comfortable because it is so hard. Instead of filling all your crevices with gel pads, which effectively give many more points of friction and cause saddle sores, the Brooks saddles are effectively a very stiff hammock hung from each end.