`- 7075 aluminum thread ring and spacer preload collar for adjusting tension on bottom bracket bearings for 30mm and DUB spindle cranks\n- Fits: eeWing 30mm spindle, Raceface 30mm spindles, SRAM 30mm spindle, SRAM 28.99 Dub spindles\n- 30mm and 28.99mm threaded inner rings included. Use silver thread ring for DUB cranks. Use gold thread ring for 30mm cranks\n- Grade 5 titanium 2.5mm hex fastening bolt