{"id":13973,"date":"2015-07-27T15:09:25","date_gmt":"2015-07-27T14:09:25","guid":{"rendered":"http:\/\/www.merlincycles.com\/blog\/?p=13973"},"modified":"2022-08-09T14:34:18","modified_gmt":"2022-08-09T13:34:18","slug":"buyers-guide-to-mountain-bike-headsets","status":"publish","type":"post","link":"https:\/\/www.merlincycles.com\/blog\/buyers-guide-to-mountain-bike-headsets\/","title":{"rendered":"Buyers guide to mountain bike headsets"},"content":{"rendered":"<p>Demystify headsets by reading this guide. What things you need to measure before ordering.\u00a0How to tell an integrated headset from a regular headset and everything else you need to know.<!--more--><\/p>\n<p>There&#8217;s no getting away from it, choosing a headset can be confusing. Loads of different standards. Loads of different names for the same thing.<\/p>\n<p>Thankfully the headset companies have talked to each other and come up with a system for identifying headsets: S.H.I.S. This stands for Standard headset Information System.<\/p>\n<p>Using this system is unavoidably a bit complicated but it does result in you getting the correct headset for your bike.<\/p>\n<h2>1. Identify if your headset is Press Fit or Integrated<\/h2>\n<p>Press Fit headsets have headset bearing cups sitting between the frame and the bearing. With integrated headsets the bearings sit directly in the frame with nothing between. An Integrated headset is just a pair of bearings and a star fangled nut and top cap. No cups.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13987 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050155-768x513.jpg\" alt=\"P1050155\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050155-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050155-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050155.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>The photo above shows an Integrated headset lower. S.H.I.S. calls Integrated headsets &#8216;IS&#8217;.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13989 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050159-768x513.jpg\" alt=\"P1050159\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050159-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050159-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050159.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>If you can see a headset cup outside of your frame, even just a flange or lip (as in the photo above) then your headset is Press Fit. If you can&#8217;t see a headset ie. it&#8217;s entirely sitting inside the frame head tube, then your headset is Integrated.<\/p>\n<p>Zero Stack, Conventional, External Cup, Low Profile, Integrated With Cups, Internal, Semi-Integrated, Non-Integrated &#8211; ALL of these are Press Fit headsets.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13988 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050157-768x513.jpg\" alt=\"P1050157\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050157-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050157-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050157.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>The above pic is a headset with upper and lower External Cups. Another name for External Cup headset type is &#8216;Conventional&#8217;.<\/p>\n<p>S.H.I.S. just splits Press Fit headsets into two types: External Cup (&#8216;EC&#8217;) and Zero Stack (&#8216;ZS&#8217;). External Cup is where the bearings sits outside of the frame. Zero Stack is where the bearing sits inside the frame.<\/p>\n<p>Headsets can be one type for the upper and another type for the lower(!) It is possible, for example, to have a ZS upper and an EC lower (as in the photo below).<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13993 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050166-768x513.jpg\" alt=\"P1050166\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050166-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050166-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050166.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<h2>2. Measure the inside diameter of your frame&#8217;s head tube<\/h2>\n<p>To do this you will have to remove your existing headset from your frame. There are specific tools available for this task but you can use a wide flat blade screwdriver and a hammer if you&#8217;re very careful &#8211; work around the head tube a bit at a time.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13991 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050162-768x513.jpg\" alt=\"P1050162\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050162-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050162-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050162.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>You will need to measure (in millimetres) the inside diameter (ID) of the top of the head tube (above pic) and the bottom of the head tube (pic below). Measurements are rounded to the nearest millimetre.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13992 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050164-768x513.jpg\" alt=\"P1050164\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050164-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050164-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050164.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>Example: a tapered frame with a 44mm upper ID and a 56mm lower ID.<\/p>\n<h2>3. Measure your fork steerer tube<\/h2>\n<p>You need to measure it in two places.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13994 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050167-768x513.jpg\" alt=\"P1050167\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050167-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050167-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050167.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>The outside diameter (OD) of the top section (where the stem clamps around, as in the above pic) and the outside diameter of the very bottom bit where the steerer goes into the fork crown (where the headset crown race sits, as in the pic below).<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-13995 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050172-768x513.jpg\" alt=\"P1050172\" width=\"768\" height=\"513\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050172-768x513.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050172-1024x684.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050172.jpg 1533w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/513;\" \/><\/p>\n<p>On integrated forks you can measure the angle of the built-in crown race. It will almost certainly be 45 degrees but obsolete 36 degree designs do appear on old frames.<\/p>\n<p>NB: 45 degree headsets may have &#8220;36&#8221; written in their descriptions (ie. 45 x 45\/36) but just ignore that. If it says &#8220;45&#8221; anywhere in the description it&#8217;s a 45 degree headset.<\/p>\n<p>Example: an 1 1\/8th steerer fork with a 28.6mm top OD and a 40mm bottom OD.<\/p>\n<h2>4. Write down your headset&#8217;s full stats<\/h2>\n<p>You should have six notes in total, three for each &#8216;half&#8217; of the headset.<\/p>\n<ol>\n<li>Upper headset type<\/li>\n<li>Upper frame internal diameter<\/li>\n<li>Fork steerer top outside diameter<\/li>\n<li>Lower headset type<\/li>\n<li>Lower frame internal diameter<\/li>\n<li>Fork steerer bottom outside diameter<\/li>\n<\/ol>\n<p>So for\u00a0a frame with&#8230;<\/p>\n<ol>\n<li>Press fit Zero Stack upper headset<\/li>\n<li>44mm internal diameter head tube top<\/li>\n<li>28.6mm fork steerer top outside diameter<\/li>\n<li>Press fit External Cup lower headset<\/li>\n<li>49mm internal diameter head tube bottom<\/li>\n<li>40mm\u00a0fork steerer bottom outside diameter<\/li>\n<\/ol>\n<p>Your S.H.I.S. numbers are ZS44\/28.6 for the upper headset half and EC49\/40 for the lower headset half.<\/p>\n<p>Use these numbers when researching and browsing for a new headset and you&#8217;ll be certain to end up with the correct headset for your bike.<\/p>\n<p>Below is an informative picture from <a href=\"https:\/\/www.merlincycles.com\/brand\/hope\/\">Hope<\/a> Technology that covers pretty much all the relevant dimensions (click pic for the full size version).<\/p>\n<p><a href=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/hopesets.jpg\" data-rel=\"lightbox-image-0\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" class=\"aligncenter size-medium wp-image-14001 lazyload\" data-src=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/hopesets-768x329.jpg\" alt=\"hopesets\" width=\"768\" height=\"329\" data-srcset=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/hopesets-768x329.jpg 768w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/hopesets-1024x439.jpg 1024w, https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/hopesets.jpg 1765w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 768px; --smush-placeholder-aspect-ratio: 768\/329;\" \/><\/a><\/p>\n<h2>Still confused?<\/h2>\n<p>Leave a comment in the section below and we&#8217;ll do our best to help you out.<\/p>\n<p><a href=\"https:\/\/www.merlincycles.com\/headsets-81187\/?utm_source=blog&amp;utm_medium=blog&amp;utm_campaign=blog-31\">Shop for headsets at Merlin Cycles<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Demystify headsets by reading this guide. What things you need to measure before ordering.\u00a0How to tell an integrated headset from a regular headset and everything else you need to know.<\/p>\n","protected":false},"author":12,"featured_media":13992,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[68,4],"tags":[593,74,1679,1217,1206,230,1651,591],"ppma_author":[4639],"class_list":["post-13973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cycling-buyers-guides","category-news","tag-beginner","tag-buyers-guide","tag-cane-creek","tag-fsa","tag-headsets","tag-hope","tag-mechanic","tag-workshop","author-benji"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Buyers guide to mountain bike headsets - Merlin Cycles Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.merlincycles.com\/blog\/buyers-guide-to-mountain-bike-headsets\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Buyers guide to mountain bike headsets\" \/>\n<meta property=\"og:description\" content=\"Demystify headsets by reading this guide. What things you need to measure before ordering.\u00a0How to tell an integrated headset from a regular headset and\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.merlincycles.com\/blog\/buyers-guide-to-mountain-bike-headsets\/\" \/>\n<meta property=\"og:site_name\" content=\"Merlin Cycles Blog\" \/>\n<meta property=\"article:published_time\" content=\"2015-07-27T14:09:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-08-09T13:34:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.merlincycles.com\/blog\/wp-content\/uploads\/2015\/07\/P1050164.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1533\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Benji Haworth\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benji Haworth\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/\"},\"author\":{\"name\":\"Benji Haworth\",\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/#\\\/schema\\\/person\\\/83ef1d952f84e08fb7ca8d06cbf61836\"},\"headline\":\"Buyers guide to mountain bike headsets\",\"datePublished\":\"2015-07-27T14:09:25+00:00\",\"dateModified\":\"2022-08-09T13:34:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/\"},\"wordCount\":767,\"commentCount\":7,\"image\":{\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/wp-content\\\/uploads\\\/2015\\\/07\\\/P1050164.jpg\",\"keywords\":[\"beginner\",\"buyers guide\",\"cane creek\",\"fsa\",\"headsets\",\"hope\",\"mechanic\",\"workshop\"],\"articleSection\":[\"Buyers Guides\",\"News\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/\",\"url\":\"https:\\\/\\\/www.merlincycles.com\\\/blog\\\/buyers-guide-to-mountain-bike-headsets\\\/\",\"name\":\"Buyers guide to mountain bike headsets - 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