Bottom Bracket Removal & Installation: Threaded | Park Tool - Hollowtech bottom bracket removal Like 91.72% | 823 votes Views: 735 644 Download Tools. Shinamo. Loosen The Left. Categories: Whitney wisconsin Comments: Add Comment Cancel By Nelar - 21:10 Return To The Left. By Fenrigis - 02:31 Shimano Hollowtech bottom brackets need a special ring spanner that allows each side to be screwed in and out. By Yolkis - 13:48 First time removing a hollowtech Dura Ace bottom bracket. By Gujas - 15:28 More importantly, crankset removal is required to either maintain or replace your bottom bracket – the bearings its spindle spins on. Sometimes.