If it's good enough for Nathan Williams then you know it's built right. Nathan's siganture Kink Fork is an absolute machine that's built to last. Made from 100% 4130 Chromoly with a TruTherm post weld heat-treatment that really increases their strength and durabiility. The 10mm dropout slots feature the ability to swap between a 20mm offset or a 25mm offset with the screw in spacers. ###section### Product Specs Steerer Length: 165mm Steerer Diameter: 1 1/8" Wheel Size: 20" Material: 100% 4130 heat treated Cro-mo Dropout Size: 10mm Offset: 20mm/25mm Weight: 0.22lbs (99.8g) Colour: Chrome, ED Black