{"id":9153,"date":"2024-03-20T18:17:40","date_gmt":"2024-03-20T17:17:40","guid":{"rendered":"https:\/\/dandyhorse.cc\/axle-and-hub-standards-cassette-compatibility-and-rotor-mounting-how-to-measure-and-choose\/"},"modified":"2026-04-09T16:06:47","modified_gmt":"2026-04-09T14:06:47","slug":"axle-and-hub-standards-cassette-compatibility-and-rotor-mounting-how-to-measure-and-choose","status":"publish","type":"post","link":"https:\/\/dandyhorse.cc\/en\/axle-and-hub-standards-cassette-compatibility-and-rotor-mounting-how-to-measure-and-choose\/","title":{"rendered":"Axle and hub standards, cassette compatibility, and rotor mounting: how to measure and choose"},"content":{"rendered":"\n
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\"dandy<\/figure>\n<\/div>\n\n\n\n
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In the past, the issue of axle standards was much simpler. All wheels had a surface for rim brakes, and road hubs could be divided into two main types: Shimano and Campagnolo. Mounting was done using skewers also known as quick releases or QRs.<\/p>\n\n\n\n

Front wheels fit forks with a hub mounting spacing of 100 mm. In turn, road rear wheels had a spacing of 130 mm (previously 125 mm), and rear wheels in MTB and cyclocross bikes \u2014 135 mm. And that was the end of complicated standards.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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THRU AXLES IN BICYCLE HUBS<\/strong><\/h2>\n\n\n\n

QR skewers, usually based on an eccentric mechanism, wore out over time. In the pursuit of weight reduction, riders reached for very light skewers, e.g. titanium, which often led to the wheels loosening in the dropouts. The use of thru axles eliminated this problem and significantly increased the stiffness of the entire system. Thru axles dominate modern bikes.<\/p>\n\n\n\n

In most road, gravel, and cyclocross bikes:<\/p>\n\n\n\n

    \n
  • 12\u00d7100 front<\/li>\n\n\n\n
  • 12\u00d7142 rear<\/li>\n<\/ul>\n\n\n\n

    In most MTB bikes:<\/p>\n\n\n\n

      \n
    • 15\u00d7110 (Boost) front<\/li>\n\n\n\n
    • 12\u00d7148 (Boost) rear<\/li>\n<\/ul>\n\n\n\n

      A less common solution in bikes with disc brakes is the previously mentioned QR (quick release) skewers:<\/p>\n\n\n\n

        \n
      • 5\u00d7100 (also known as 9\u00d7100) front<\/li>\n\n\n\n
      • 5\u00d7135 (also known as 10\u00d7135) rear<\/li>\n<\/ul>\n\n\n\n

        <\/p>\n\n\n\n

        <\/p>\n<\/div>\n<\/div>\n\n\n\n

        \n
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        REAR HUB 141×9 (141 BOOST)<\/strong><\/h2>\n\n\n\n

        Some manufacturers use sizes 5×100, 15×100 or 15×110 for the front wheel and a less common 141×9 spacing at the rear, also known as 141 Boost. In this case, the rear freehub body is the same as modern MTB Boost hubs, with the difference that the wheel is attached to the frame using a QR skewer.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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        ROAD BOOST 12×110 \/ 12×148 HUBS<\/strong><\/h2>\n\n\n\n

        The Boost standard in mountain bikes has replaced thru axles with a spacing of 100 mm at the front and 142 mm at the rear. Hubs with wider spaced flanges are also found in gravel bikes and some road bikes (especially those with electric drives). However, it is important to note that this does not automatically mean that MTB Boost hubs are compatible with gravel bikes that use the Road Boost standard.<\/p>\n\n\n\n

        However, there are some MTB hub models that can be converted and adapted to the road or gravel Boost standard.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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        HOW TO MEASURE AXLES IN A BIKE?<\/strong><\/h2>\n\n\n\n

        The axle standard can be checked in the bike’s specifications, but it is important to remember that it may change in different years of the same model. Bicycle manufacturers can be frugal with information, and the parameters of older models may be difficult to find online. In such a situation, apart from contacting a bicycle service to verify the axle standard, we are left with the option of self-verification “by eye”.<\/p>\n\n\n\n

        The name of each standard consists of two values separated by an “x” character. The lower value specifies the inner diameter of the hub axle, which is the hole through which the axle passes when screwed into the fork or frame. The higher value is the spacing of the hub mounting points, or the distance between the points where the hub contacts the frame or fork.<\/p>\n<\/div>\n<\/div>\n\n\n\n

        \"Form<\/figure>\n\n\n\n
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        FREEHUB STANDARDS IN BICYCLE WHEELS<\/strong><\/p><\/h2>\n\n\n\n

        The freehub body standard determines cassette compatibility. Different models can be mounted on the following most common freehub body standards:<\/p>\n\n\n\n

        \n
        \n
        \"\"<\/figure>\n<\/div>\n\n\n\n
        \n

        \u2022 Shimano HG (9\/10s road and 11s MTB cassettes)
        \u2022 Shimano HG-EV (11s road cassettes or 9\/10s and 11s MTB with spacer)
        \u2022 Shimano MicroSpline (12s cassettes from MTB groups)
        \u2022 Sram XD (12s MTB cassettes)
        \u2022 Sram XDR (12s road cassettes or 12s with spacer)
        \u2022 Campagnolo (9\/10\/11\/12s cassettes)
        \u2022 Campagnolo N3W (13s cassette)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

        \n
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        CASSETTE COMPATIBILITY WITH HUB BODIES IN BICYCLE WHEELS<\/strong><\/h2>\n\n\n\n

        \u2022 Shimano 11s road cassette is compatible with Shimano 11s (HG-EV) freehub body.
        \u2022 Shimano 12s road cassette is compatible with Shimano 11s (HG-EV) freehub body.
        \u2022 Sram 12s road cassette is compatible with Sram XDR freehub body.
        \u2022 Shimano 11s MTB cassette is compatible with Shimano HG (and HG-EV + spacer) freehub body.
        \u2022 Shimano 12s MTB cassette is compatible with Shimano Micro Spline freehub body.
        \u2022 Sram 12s MTB cassette is compatible with Sram XD (and XDR + spacer) freehub body.
        \u2022 Campagnolo 9\/10\/11\/12s road cassettes are compatible with Campagnolo freehub body.
        \u2022 Campagnolo 13s gravel cassette is compatible with Campagnolo N3W freehub body.<\/p>\n\n\n\n

        \u2022 Cassettes compatible with the Shimano 11s HG standard can be mounted on a freehub body in the Shimano 11s HG-EV standard after installing a 1.85 mm spacer ring.
        \u2022 Cassettes compatible with the Sram XD standard can be mounted on a freehub body in the Sram XDR standard after installing a 1.85 mm spacer ring.<\/p>\n\n\n\n

        There are some exceptions:
        \u2022 Sram NX\/SX Eagle and SunRace 12s cassettes are compatible with the Shimano 11s freehub body in the mountain standard (HG)
        \u2022 Sram PG-1231 XPLR 12s cassettes are compatible with the Shimano 11s freehub body (HG-EV)
        \u2022 There are also 11s cassettes with the smallest cog of 10t compatible with the Sram XD freehub body.<\/p>\n\n\n\n

        The Dandy Horse TCN and DT Swiss hubs, on which we build road and gravel wheels, have Shimano HG-EV standard hub bodies.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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        BRAKE DISC MOUNTING: CENTERLOCK OR IS (SIX BOLTS)<\/strong><\/h2>\n\n\n\n

        There are two main ways to attach brake discs to the hub: Centerlock (CL) and International Standard (IS), commonly called six-bolt.<\/p>\n\n\n\n

        Centerlock is the dominant standard in road and gravel bikes, and it is also gaining popularity in MTB XC. It features easier disc mounting and removal, as well as greater stiffness and better heat dissipation.<\/p>\n\n\n\n

        IS mounting is more common in heavier MTB variants and in budget road and gravel bikes, especially when the manufacturer uses the same hub model in different bike models in its range. This is a cheaper solution to produce, but less convenient to mount and remove.<\/p>\n\n\n\n

        Changing the mounting standard:<\/strong><\/p>\n\n\n\n

        If you change a wheel with Centerlock mounting to IS, you can use adapters to allow you to use your existing IS discs. However, it is worth considering whether it is better to use the money to buy new discs for the Centerlock standard (the cost of DT Swiss adapters from CL to IS is around PLN 100 per wheel) instead of buying adapters.<\/p>\n\n\n\n

        Changing to a complete wheelset with a different disc mounting standard does not affect compatibility with the brake calipers on the bike, but may require caliper adjustment.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

        This article discusses axle standards, hubs, and rotor mounting types. We address the compatibility of cassettes with Shimano HG, HG-EV, Microspline, Sram XDR, XD hubs, and explain which hub is needed for a Shimano 12s road cassette.<\/p>\n","protected":false},"author":1463,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Axle and Hub Standards, Cassette Compatibility, and Rotor Mounting: How to Measure and Choose","_seopress_titles_desc":"Explore axle standards, hub types, and rotor mounting systems. Learn about cassette compatibility with Shimano HG and HG-EV, plus differences between SRAM XD, XDR, and Shimano Microspline for 12-speed road setups.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"_jf_save_progress":"","iawp_total_views":1044,"footnotes":""},"categories":[138],"tags":[405,407,266,406],"class_list":["post-9153","post","type-post","status-publish","format-standard","category-bicycle-wheels","tag-axles","tag-cassette","tag-compatibility","tag-freehubs"],"_links":{"self":[{"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/posts\/9153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/users\/1463"}],"replies":[{"embeddable":true,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/comments?post=9153"}],"version-history":[{"count":5,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/posts\/9153\/revisions"}],"predecessor-version":[{"id":55374,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/posts\/9153\/revisions\/55374"}],"wp:attachment":[{"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/media?parent=9153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/categories?post=9153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dandyhorse.cc\/en\/wp-json\/wp\/v2\/tags?post=9153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}