{"id":22816,"date":"2025-05-01T17:08:17","date_gmt":"2025-05-01T08:08:17","guid":{"rendered":"https:\/\/growtac.com\/?post_type=ufaq&#038;p=22816"},"modified":"2025-05-16T17:02:42","modified_gmt":"2025-05-16T08:02:42","slug":"ufaq-22816","status":"publish","type":"ufaq","link":"https:\/\/growtac.com\/eng\/ufaqs\/ufaq-22816\/","title":{"rendered":"What is the difference between Single-Spring and Double-Spring rear derailleurs?"},"content":{"rendered":"<div  class=\"ewd-ufaq-faq-list ewd-ufaq-page-type-load_more ewd-ufaq-category-tabs-\" id='ewd-ufaq-faq-list'>\n\n\t<input type='hidden' name='show_on_load' value='' id='ewd-ufaq-show-on-load' \/>\n<input type='hidden' name='include_category' value='' id='ewd-ufaq-include-category' \/>\n<input type='hidden' name='exclude_category' value='' id='ewd-ufaq-exclude-category' \/>\n<input type='hidden' name='orderby' value='date' id='ewd-ufaq-orderby' \/>\n<input type='hidden' name='order' value='desc' id='ewd-ufaq-order' \/>\n<input type='hidden' name='post_count' value='-1' id='ewd-ufaq-post-count' \/>\n<input type='hidden' name='current_url' value='\/eng\/wp-json\/wp\/v2\/ufaq\/22816' id='ewd-ufaq-current-url' \/>\n\t\n\t\n\t<div class='ewd-ufaq-faqs'>\n\n\t\t<div  class=\"ewd-ufaq-faq-div ewd-ufaq-faq-column-count-one ewd-ufaq-faq-responsive-columns- ewd-ufaq-faq-display-style-default ewd-ufaq-can-be-toggled\" id='ewd-ufaq-post-22816-NisaSgWXoP' data-post_id='22816'>\n\n\t\t\n\t<div class='ewd-ufaq-faq-title ewd-ufaq-faq-toggle'>\n\t\n\t<a class='ewd-ufaq-post-margin'  href='#' role=\"button\">\n\n\t\t<div class='ewd-ufaq-post-margin-symbol ewd-ufaq-square'>\n\t\t\t<span >A<\/span>\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-faq-title-text'>\n\n\t\t\t<h4>\n\t\t\t\tWhat is the difference between Single-Spring and Double-Spring rear derailleurs?\t\t\t<\/h4>\n\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-clear'><\/div>\n\n\t<\/a>\n\t\n<\/div>\n\t\n\t<div class='ewd-ufaq-faq-body' >\n\n\t\t\n\t\t\t\n\t\t\n\t\t\t<div class='ewd-ufaq-post-margin ewd-ufaq-faq-post'>\n\t\n<p>Rear derailleurs are designed to maintain chain tension regardless of which gear the chain is on. There are mainly two types: Single-Spring and Double-Spring.<br>Single-Spring derailleurs maintain chain tension using only the spring on the pulley cage rotation axis (P-tension).<br>Double-Spring derailleurs have an additional spring at the derailleur mount (B-tension), providing tension at two points.<\/p>\n\n\n\n<p>Examples using Shimano mechanical 11-speed road and gravel rear derailleurs:<\/p>\n\n\n\n<h4 id=\"outline__1\" class=\"wp-block-heading\">Single-Spring derailleur examples:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RD-R7000 105<\/li>\n\n\n\n<li>RD-R8000 ULTEGRA<\/li>\n\n\n\n<li>RD-R9100 DURA-ACE<\/li>\n\n\n\n<li>RD-RX805 ULTEGRA RX<\/li>\n\n\n\n<li>RD-RX810 GRX<\/li>\n\n\n\n<li>RD-RX812 GRX<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"683\" src=\"https:\/\/growtac.com\/wp\/wp-content\/uploads\/single_tention-1024x683.jpg\" alt=\"\" class=\"wp-image-23106\" style=\"width:600px\" \/><\/figure>\n<\/div>\n\n\n<h4 id=\"outline__2\" class=\"wp-block-heading\">Double-Spring derailleur examples:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RD-5800 105<\/li>\n\n\n\n<li>RD-6800 ULTEGRA<\/li>\n\n\n\n<li>RD-9000 DURA-ACE<\/li>\n\n\n\n<li>RD-U5000 METREA<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"683\" src=\"https:\/\/growtac.com\/wp\/wp-content\/uploads\/double_tention-1024x683.jpg\" alt=\"\" class=\"wp-image-23107\" style=\"width:600px\" \/><figcaption class=\"wp-element-caption\">Double-Spring type: RD-6800-SS<\/figcaption><\/figure>\n<\/div>\n\n\n<p>If you are unsure which type of derailleur you have, please contact the store where you purchased it.<\/p>\n<\/div>\n\t\t\n\t\t\t<div class='ewd-ufaq-faq-custom-fields'>\n\n\t\n<\/div>\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t<\/div>\n\n<\/div>\n\t<\/div>\n\n\t\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A \u30ea\u30a2\u30c7\u30a3\u30ec\u30a4\u30e9\u30fc\u306e\u30b7\u30f3\u30b0\u30eb\u30c6\u30f3\u30b7\u30e7\u30f3\u3068\u30c0\u30d6\u30eb\u30c6\u30f3\u30b7\u30e7\u30f3\u306f\u4f55\u304c\u9055\u3044\u307e\u3059\u304b\u3002 \u30ea\u30a2\u30c7\u30a3\u30ec\u30a4\u30e9\u30fc\u306b\u306f\u3001\u30c1\u30a7\u30fc\u30f3\u304c\u3069\u306e\u30ae\u30e4\u306b\u4f4d\u7f6e\u3057\u3066\u3044\u3066\u3082\u5e38\u306b\u5f35\u308a\u3092\u4fdd\u3064\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u4e3b\u306b\u30b7\u30f3\u30b0\u30eb\u30c6\u30f3\u30b7\u30e7\u30f3\u3068\u30c0\u30d6\u30eb\u30c6\u3000&#8230;<a href=\"https:\/\/growtac.com\/eng\/ufaqs\/ufaq-22816\/\">\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","ufaq-category":[189],"ufaq-tag":[],"class_list":["post-22816","ufaq","type-ufaq","status-publish","hentry","ufaq-category-clickplate-faq"],"acf":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false,"thumb-square":false,"icatch":false},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/growtac.com\/eng\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"A \u30ea\u30a2\u30c7\u30a3\u30ec\u30a4\u30e9\u30fc\u306e\u30b7\u30f3\u30b0\u30eb\u30c6\u30f3\u30b7\u30e7\u30f3\u3068\u30c0\u30d6\u30eb\u30c6\u30f3\u30b7\u30e7\u30f3\u306f\u4f55\u304c\u9055\u3044\u307e\u3059\u304b\u3002 \u30ea\u30a2\u30c7\u30a3\u30ec\u30a4\u30e9\u30fc\u306b\u306f\u3001\u30c1\u30a7\u30fc\u30f3\u304c&hellip;","_links":{"self":[{"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/ufaq\/22816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/ufaq"}],"about":[{"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/types\/ufaq"}],"author":[{"embeddable":true,"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/comments?post=22816"}],"wp:attachment":[{"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/media?parent=22816"}],"wp:term":[{"taxonomy":"ufaq-category","embeddable":true,"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/ufaq-category?post=22816"},{"taxonomy":"ufaq-tag","embeddable":true,"href":"https:\/\/growtac.com\/eng\/wp-json\/wp\/v2\/ufaq-tag?post=22816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}