Maxle 20mm 1 1/8 steerer 205 mm, 110-140 U turn. Dual air. Lovely forks and in good condition. Slight knocking when unlocked, but I've consulted tf tuned and they have said its normal and something to do withe travel helix uturn and if it wasn't like this the uturn wouldn't function. All in all they are great forks. Looking for £230 UK posted. They have hardly been used