The 1997 AMP Research B4 is a 24 pound a mountain bike with an aluminum Alcoa 6013 T6 / AMP frame. The frame comes in red or Ball  Burnished.

The B4 1997 2 is a is a lighter bike at around 25 pounds. It was released in 1997 and costs $3,170 brand new. The B4 1997 2 has frame suspension with 2.75in travel and has saddle suspension.

Components

The B4 1997 2 comes with Shimano Deore XT components, including a Control Tech stem, a threadless Dia-Compe Kontak Aheadset DL-2 headset and Shimano Deore XT RapidFire SL shifters.

Drivetrain

The B4 1997 2 has 8 speeds and has a Shimano Deore XT derailleur.

Wheels

It comes with Hutchinson tires (26in x 1.95in) and Sun Rims CR18 rims.