Features of the Lightning Phantom D What you can look forward to with your Lightning Phantom About Features Feedback Specs Contoured aero lower seat. Front hydraulic disc brake. Rear hydraulic disc brake. Handlebar tilt mechanism permits custom reach adjustment. Fixed, braced seat mount maximizes power transfer. Telescoping leg length adjustment is super strong and rigid. Our optional chain tensioner automatically takes up the chain slack. More information here. Wrap around seat mesh is cool, tight, and comfortable.