Some brooks saddles have twin rails like this:
https://www.tredz.co.uk/.Pinhead-Brooks ... 108875.htm
You can fasten them to a standard seat clamp using just one of the rails, but IIRC the rails are a little narrower so I ended up shimming them. Also said rail snapped after about a year too so probably wouldn't recommend based on my own experience.
https://www.tredz.co.uk/.Pinhead-Brooks ... 108875.htm
You can fasten them to a standard seat clamp using just one of the rails, but IIRC the rails are a little narrower so I ended up shimming them. Also said rail snapped after about a year too so probably wouldn't recommend based on my own experience.