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 RW-Corima 700c tubular 4 spoke rear wheel $2,500.00 Add to shopping bag H-Spider $100.00 Select options HW-Carbonbike 650c Tri Spoke wheel $1,000.00 Select options H-9/16″ threaded grip spindle $50.00 – $100.00