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-Plastic caps for bumper or foot rests $5.00 Select options Flag $25.00 Add to shopping bag RW- 20″Aluminum Racer front wheel $300.00 Select options HW-Carbonbike 650c Tri Spoke wheel $1,000.00