{"id":2477,"date":"2026-02-12T17:07:44","date_gmt":"2026-02-12T16:07:44","guid":{"rendered":"https:\/\/cyclingreview.nl\/?p=2477"},"modified":"2026-02-12T20:42:23","modified_gmt":"2026-02-12T19:42:23","slug":"absoluteblack-hollowcage-v2-shimano-dura-ace","status":"publish","type":"post","link":"https:\/\/cyclingreview.nl\/en\/absoluteblack-hollowcage-v2-shimano-dura-ace\/","title":{"rendered":"absoluteBLACK HOLLOWcage V2: quieter OSPW cage for Shimano Dura-Ace Di2"},"content":{"rendered":"<p><strong>absoluteBLACK<\/strong> confirms the availability of the <strong>HOLLOWcage V2<\/strong> for <strong>Shimano Dura-Ace Di2 12-speed (R9250)<\/strong>, an oversized derailleur cage that bets on a quieter drivetrain and lower friction. The price is <strong>\u20ac399<\/strong>, lower than the first generation which was around \u20ac499.<\/p>\n<p>Below are the key technical features.<\/p>\n<h2>Mono-plate: one plate, controlled flex<\/h2>\n<p>The most striking thing about the <strong>HOLLOWcage<\/strong> is the single cage plate, instead of the usual two-plate sandwich design. That mono-plate is injection-moulded from a carbon-polymer matrix, the same type of material that <strong>SRAM<\/strong> used for RED eTap AXS cages.<\/p>\n<p>The construction weighs only <strong>66 g<\/strong> (+\/- 1g) and offers controlled flex. This allows the lower wheel to align better in sloping chain lines, reducing side load on the bearings.<\/p>\n<h2>Smoother gear changing with Xring technology<\/h2>\n<p><strong>absoluteBLACK<\/strong> claims that the <strong>Silent Xring Pulley\u2122<\/strong> reduces drive noise by 5-7 dB, equivalent to about 40% less chain ratchet. The technology is simple: rubber X-ring bands in the pulley absorb the impact of the chain rollers on the teeth. According to absoluteBLACK, especially noticeable on quiet endurance rides or indoors.<\/p>\n<p>The top wheel (<strong>12T<\/strong>) is rigidly mounted for fast Di2 shifts. The lower wheel (<strong>18T<\/strong>) has the distinctive hollow design and is deliberately more flexible.<\/p>\n<h2>Full-ceramic bearings with certification<\/h2>\n<p>The bearings are fully ceramic: races of <strong>Zirconia Oxide<\/strong> and balls from <strong>Silicon Nitride<\/strong>. No hybrid variant, then. The composition has been independently verified by <strong>Lucideon Ltd<\/strong> via X-ray diffraction. <strong>absoluteBLACK<\/strong> gives there <strong>4-year warranty<\/strong> on.<\/p>\n<h2>Specifications<\/h2>\n<ul>\n<li><strong>Weight:<\/strong> 66g (+\/- 1g)<\/li>\n<li><strong>Materials:<\/strong> carbon-polymer matrix, 7075 aluminium, ceramic, rubber<\/li>\n<li><strong>Compatibility:<\/strong> exclusively Shimano Dura-Ace 9250 Di2 12-speed (max 34T cassette)<\/li>\n<li><strong>Bearings:<\/strong> full-ceramic (Zirconia Oxide races, Silicon Nitride balls)<\/li>\n<li><strong>Colour lockring:<\/strong> PVD Rainbow, Black, Titanium, Red, Gold<\/li>\n<li><strong>In the box:<\/strong> complete cage assembly plus lockring tool<\/li>\n<li><strong>Price:<\/strong> <strong>\u20ac399<\/strong><\/li>\n<\/ul>\n<p>absoluteBLACK claims no specific power gains. Developed for use with an R9250 groupset, the HOLLOWcage V2 aims for a quieter drive and a different design; with <strong>\u20ac399<\/strong> the price is below that of the first generation.<\/p>\n<p>More info at <a href=\"https:\/\/absoluteblack.cc\/hollowcage-carbon-ceramic-oversized-derailleur-pulley-cage-9200\">absoluteblack.cc<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>The HOLLOWcage V2 from absoluteBLACK combines mono-plate carbon-polymer construction with full-ceramic bearings and patented noise dampening. Weight: 66g. Price: substantially lower than the first generation.<\/p>","protected":false},"author":1,"featured_media":2479,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[27],"tags":[200,202,203],"class_list":["post-2477","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materiaal","tag-absoluteblack","tag-ospw","tag-shimano-di2-dura-ace"],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/posts\/2477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/comments?post=2477"}],"version-history":[{"count":3,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/posts\/2477\/revisions"}],"predecessor-version":[{"id":2499,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/posts\/2477\/revisions\/2499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/media\/2479"}],"wp:attachment":[{"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/media?parent=2477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/categories?post=2477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cyclingreview.nl\/en\/wp-json\/wp\/v2\/tags?post=2477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}