H-Carbonbike bottom bracket adapters $100.00 This adaptor is used for reducing bearing size to 30mm. H-Carbonbike bottom bracket adapters quantity Add to shopping bag Description Additional Information Need Help? Contact Us Leave Feedback Contact Us Enter your contact details or email form shortcode here. (Text/HTML/Shortcodes accepted). Leave Feedback Enter your feedback modal content here. (Text/HTML/Shortcodes accepted). Share Related Products Add to shopping bag H-Tetra adaption bars for mounting brake and shift lever to frame $120.00 Add to shopping bag RW- 20″Aluminum Racer front wheel $300.00 Select options H-FORK F-21 $4,600.00 Select options H-Bottom bracket spindle $125.00 – $250.00