Full Speed Ahead NO.55R/57-A Headset - For 62mm OD Head tube 1.5" w/TH-874-1 Anodized BLK CheckoutTitle=Kool Stop Disc Pads Electric Bike Compound }Surly Lowside Frameset - 27

}Surly Lowside Frameset - 27

TOP TUBE LENGTH: 18

Brushed fleece lining for warmth and next-to-skin comfort

}Muc-Off Workshop Tubeless Valve Box - Silver/Black

}Shimano Dura-Ace RD-R9250F Di2 Rear Derailleur - 12-Speed Medium Cage Includes TL-EW300 Black

Full Speed Ahead NO.55R/57-A Headset - For 62mm OD Head tube 1.5" w/TH-874-1 Anodized BLK CheckoutTitle=Kool Stop Disc Pads Electric Bike Compound }Surly Lowside Frameset - 27Full Speed Ahead NO. 55R 57 A Headset For 62mm OD Head tube 1. 5" w TH 874 1 Anodized Black. The Full Speed Ahead NO. 55R 57 A is designed for use with 62mm outside diameter head tubes and features high performance 1. 5" Angular Contact Bearings (ACB) with black seals. For use with 62mm outside diameter head tubes Designed for 1 1 8" to 1 1 2" tapered forks Aluminum top cover 1. 5" angular contact bearings provide smooth movement while the black seals