The Trail SL 6 is designed with Cannondale's trademark double-pass smooth-welded technology which gives the Trail SL 6 it's handcrafted aesthetic. | The Trail SL 6 uses double butted tubing for an increase in frame strength and stiffness with no comprise on weight.| The Trail SL 6 uses the OnePointFive Standard head tube this helps to stiffen and lighten the frame making steering better. Available in red.