If you research early Mt Bikes you will see a lot of them with Brooks Flyer, B66 or B72 saddles. Flyer is a B17 with springs, B66 & B72 have a wider seat area than B17, B66 has coil springs, B72 has 4 rails with just a single coil on each rail. The B66/B72 wider saddles work better with a more upright riding posture: wallbikes has lots of good info on Brooks saddles on their web site. Don