Why does rsync not copy the other execute bit when copying to an sshfs mount?

I have a mounted sshfs drive at /mnt/backup_datascrape with permission rwxrwxr-x. I am trying to copy a directory foo with permission rwxrwxr-x to that mount using rsync while preserving the permissions. But when I do this, the permission for the copied directory on the sshfs mount is rwx------. If I change the permission for directory foo to rwxrwxr--, rsync correctly preserves the permissions. So in this situation it appears rsync removes all non user permissions if there is a global execute permission set. Does anyone know why this is? This is the command I use to rsync. rsync -avhz --delete --exclude 'env' /home/datascrape/foo /mnt/backup_datascrape/