{"id":3183,"date":"2019-09-08T15:12:21","date_gmt":"2019-09-08T13:12:21","guid":{"rendered":"https:\/\/qu-ax.de\/en\/?p=3183"},"modified":"2020-07-28T16:24:49","modified_gmt":"2020-07-28T14:24:49","slug":"tires-tubes","status":"publish","type":"post","link":"https:\/\/qu-ax.de\/en\/2019\/tires-tubes\/","title":{"rendered":"Tires &#038; Tubes"},"content":{"rendered":"<h2>Tyres- and Tubesizes for unicycles<\/h2>\n<p>It\u2019s a bit complicated with the Tire-sizes of the unicycle. Same for bicycles \u2013 since mostly, their tires are used.\u00a0Tire sizes are mostly defined in Inches and with the Metric-system (ISO \/ ETRTO-size).<\/p>\n<p>E.T.R.T.O. means European Tire and Rim Technical Organisation &#8211; which was the base for the ISO-norms, the International Organization for Standardization. This standard helps to find the right size &#8211; because in the past the tyre size was defined by each country itself &#8211; and was therefore incompatible with each other despite the fact that the nominal size seemed to be the same. In inches and in fractions.<\/p>\n<p>A 20\u2033x1,95\u2033 tire has got an inner tire-diameter of 20\u2033 (406 mm). It is specified with a width of 1,95\u2033 (47 mm). Allthough this varies a lot according to maker and rim on which the tire is mounted on.<\/p>\n<p>Here\u2019s an overview with inch\/ETRTO diameters:<\/p>\n<ul>\n<li>12 1\/2\u2033: 203 mm<\/li>\n<li>16\u2033: 305 mm<\/li>\n<li>18\u2033: 355 mm<\/li>\n<li>19\u2033: 387 mm<\/li>\n<li>20\u2033: 406 mm<\/li>\n<li>24\u2033: 507 mm<\/li>\n<li>26\u2033: 559 mm<\/li>\n<li>27,5\u2033: 584 mm<\/li>\n<li>28\u2033 \/ 29\u2033: 622 mm<\/li>\n<li>36\u2033: 787 mm<\/li>\n<\/ul>\n<p>Besides these, today most popular sizes, there is still an \u201cold\u201d inch system, not writing the values after the comma in numbers but fractured like 12 1\/2\u2033 for example. Unfortunately, it is not as you might think the same like 12,5\u2033. The only thing you need to remember here is the Brown\u2019s Law of tire sizing:<\/p>\n<p>If two tires are marked with sizes that are mathematically equal,<br \/>\nbut one is expressed as a decimal and the other as a fraction,<br \/>\nthese two tires will not be interchangeable. Find out more about this <a href=\"https:\/\/www.sheldonbrown.com\/tyre-sizing.html\">here<\/a>.<\/p>\n<h3>19&#8243; and 20&#8243; &#8211; where is the difference?<\/h3>\n<p>In unicycling we get mostly asked for 19\u2033 and 20\u2033 \u2013 and the difference between them. That\u2019s why we would like to tell a little bit more about wheel-sizing here:<\/p>\n<p>20\u2033 \u2013 ETRTO size 406 mm describes the diameter of the rim. 406 mm (20\u2033) is also typical on children bicycles and on QU-AX Luxus and Profi 20\u2033 for example. The QU-AX Muni Starter is also a real 20\u2033 with an ETRTO-size of 406 mm.<\/p>\n<p>Another size often called 20\u2033 \u2013 is the 19\u2033 size. Its ETRTO size is 387 mm. This size comes out of the bicycle-trial. There, wide and voluminous tires (at least 2,5\u2033 or 67 mm wide) are wanted for rebound when jumping and for rim-protection upon impact.<\/p>\n<p>The reason why they often call 19\u2033 a 20\u2033 tire is because in the US, the wheels are often defines through the overall-size, including tire. That\u2019s why they sometimes call a wheel with a wide and fat 19\u2033 tire a 20\u2033 wheel. So our Muni Starter with the fat 20\u2033 tire would then be called a 21\u2033 \u2013 at least theoretically.<\/p>\n<div class=\"row\"  id=\"row-859841150\">\n\n\t<div id=\"col-62916208\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1951550276\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"637\" height=\"1024\" src=\"https:\/\/qu-ax.de\/en\/wp-content\/uploads\/sites\/2\/2017\/11\/1106_wp-637x1024.jpg\" class=\"attachment-large size-large\" alt=\"Luxus 20&quot; orange learner unicycle\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1951550276 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<p>Ein QU-AX<a href=\"https:\/\/qu-ax.de\/catalog\/Luxus-unicycle-406-mm-20-orange\"> Luxus 20&#8243;<\/a> (406 mm)<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-126672915\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1436023978\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"637\" height=\"1024\" src=\"https:\/\/qu-ax.de\/en\/wp-content\/uploads\/sites\/2\/2016\/04\/1500-637x1024.jpg\" class=\"attachment-large size-large\" alt=\"QU-AX Muni Starter\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1436023978 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<p>A QU-AX <a href=\"https:\/\/qu-ax.de\/catalog\/Muni-Starter-406-mm-20-black\">Muni Starter in 20&#8243;<\/a> (406 mm) with fat 2,5&#8243; tyre.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-1008180880\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_2130130503\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"637\" height=\"1024\" src=\"https:\/\/qu-ax.de\/en\/wp-content\/uploads\/sites\/2\/2018\/03\/19_rot-637x1024.jpg\" class=\"attachment-large size-large\" alt=\"#rgb 19&quot; QX unicycle, red\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_2130130503 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<p>A <a href=\"https:\/\/qu-ax.de\/catalog\/custom-QX-rgb-Trials-Uni-387-mm-19\">QX-series #rgb 19&#8243;<\/a> (387 mm) with fat 2,5&#8243; tyre.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<p>As already the different ETRO sizes might make you guess: 19\u2033 and 20\u2033 are not compatible with each other since they simply have a different size. So the best tip for you is to look after the ETRTO-size, this way you are sure to find a precise size.<\/p>\n<h3>28&#8243; and 29&#8243; &#8211; what is the difference here?<\/h3>\n<p>It\u2019s nearly the same for 29\u2033. If you look at the ETRTO-size (622 mm), it is a 28\u2033 wheel (622 mm ETRTO). But especially \u201cfat\u201d 28\u2033 wheels like Muni-wheels (or on Mountainbikes called \u201cTwentyniners\u201d). 29\u2033. Since the exterior diameter is rather a 29\u2033 \u2013 allthough that is not on official size.\u00a0As already mentioned in the beginning, it\u2019s a bit complicated with wheel sizes. \u00a0Because a 24\u2033 with fat tire (like on a 24\u2033 Muni) is not called a 25\u2033.<\/p>\n<h3>24&#8243; and race unicycles according to IUF<\/h3>\n<p>On Race unicycles, the IUF allows a 24\u2033 unicycle for most competitions \u2013 but defines it with the exterior diameter (618mm) so with tire. In the beginning of unicycle-races the unicycles still had quite right 1,75 or 1,95 tires, that left quite lots of space between rim and limit. So one day, some racers tried to use a 26\u2033 rim with a narrow racing-tire (lighter, less rolling resistance) \u2013 which still was within the regulation. So the rule says 24\u2033 \u2013 but most race-unicycles, according the the rim size \u2013 are 26\u2033 wheels.<\/p>\n<div class=\"row\"  id=\"row-1776998798\">\n\n\t<div id=\"col-1434499879\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1743643787\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"637\" height=\"1024\" src=\"https:\/\/qu-ax.de\/en\/wp-content\/uploads\/sites\/2\/2017\/11\/1202-637x1024.jpg\" class=\"attachment-large size-large\" alt=\"Profi unicycle 507 mm (24&quot;) BB unicycle Q-Axle black\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1743643787 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<p><a href=\"https:\/\/qu-ax.de\/catalog\/Profi-unicycle-507-mm-24-BB-unicycle-Q-Axle-black\">QU-AX Profi BB 24&#8243;<\/a><\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-2016540017\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_123338178\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"637\" height=\"1024\" src=\"https:\/\/qu-ax.de\/en\/wp-content\/uploads\/sites\/2\/2019\/06\/7212-637x1024.jpg\" class=\"attachment-large size-large\" alt=\"QX-series Profi BB #rgb\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_123338178 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<p><a href=\"https:\/\/qu-ax.de\/catalog\/Profi-unicycle-507-mm-24-BB-unicycle-rgb-black\">QU-AX Profi BB #rgb 24&#8243;<\/a><\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<p>Finally, there are three more criterias that are relevant on rims:<\/p>\n<ul>\n<li>The spoke-holes \u2013 which have to be same as on the hub \u2013 the more, the more robust the wheel is, best around 36 holes \u2013 for extra-sturdy wheels even 48. On child unicycles less are okay, too (28 e.g.) since otherwise the wheel would have the spokes too near to each other.<\/li>\n<li>The second one is the rim width. A wider rim is more solid \u2013 and is even needed for wider tires so that the tire does not \u201ccurve\u201d to much.<\/li>\n<li><span style=\"color: #555555;\">And the third one is the rim-architecture: A double-walled rim is more sturdy than a single-walled rim.<\/span><\/li>\n<\/ul>\n<h3>Pattern<\/h3>\n<p>The tread pattern and colour of the tyre depend mainly on the field of use. Inndoors in halls, a light tyre or white colour is often desired. Alsp, a dense tread without coarse studs &#8211; which is also most conducive to driving characteristics on firm ground. For off-road tyres themselves, the <a href=\"https:\/\/qu-ax.de\/catalog\/Maxxis-tire-38767-19x25-Creepy-Crawler\">Maxxis Creepy Crawler<\/a> or the <a href=\"https:\/\/qu-ax.de\/catalog\/OBR-Tyre-38767-19x26-Gekok\">OBR Gekok<\/a> is very popular in the 19&#8243; trial area. In flatland the<a href=\"https:\/\/qu-ax.de\/catalog\/Monty-Tyre-38767-19x26-Eagle-Claw-Pro-Race-V2\"> Monty PRO<\/a> is preferred. With 24&#8243; Munis there is almost only the <a href=\"https:\/\/qu-ax.de\/catalog\/Duro-Reifen-50775-mm-24x30-Razorback-Wildlife\">Duro Razorback (formerly Leopard Wildlife)<\/a> as a really wide tyre. At 27.5&#8243; and 29&#8243; the rider has the choice between the full range of mountain bike and bicycle tyres, width, profile depend on personal preferences and area of use. It should always be noted that the width of the tyre fits changing according to rim width it is mounted on &#8211; and the height and width of the tyre also has to fit into the fork!<\/p>\n<p>Whether and how a tyre can leave marks on indoor grounds cannot be said with general certainty, since it depends not only on the tyre material &#8211; but also on the respective floor, its treatment, cleaning agents, temperature etc&#8230;<\/p>\n<h3>What tyre for which unicycle?<\/h3>\n<p>Following overview should help you to find fitting tires for your unicycle:<\/p>\n<h4>12&#8243; QU-AX Luxus:<\/h4>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-203-mm-12-black\">QU-AX Tire 203 mm (12\u2033) black<\/a><\/li>\n<\/ul>\n<p>16&#8243; QU-AX Luxus, OnlyOne 16&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-305-mm-16-yellow\">QU-AX Tire 305 mm (16\u2033) yellow<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-305-mm-16-yellow\">QU-AX Tire 305 mm (16\u2033) white<\/a><\/li>\n<\/ul>\n<p>18&#8243; QU-AX Luxus, OnlyOne 18&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-355-mm-18-white\">QU-AX tire 355 mm (18\u2033) white<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-355-mm-18-white\">QU-AX tire 355 mm (18\u2033) yellow<\/a><\/li>\n<\/ul>\n<p>20&#8243; QU-AX Luxus, OnlyOne 20&#8243;, Profi 20&#8243;, steel giraffe and QX 20&#8243; giraffe:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-406-mm-20-black\">Kenda Tire 406 mm (20\u2033), blue<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-406-mm-20-black\">Kenda Tire 406 mm (20\u2033) pink<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-406-mm-20-black\">Kenda Tire 406 mm (20\u2033), orange<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-406-mm-20-black\">Kenda Tire 406 mm (20\u2033), red<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-406-mm-20-black\">QU-AX Tire 406 mm (20\u2033), black<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-406-mm-20\">QU-AX Tire 406 mm (20\u2033) yellow<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-406-mm-20\">QU-AX Tire 406 mm (20\u2033) green<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-406-mm-20\">QU-AX Tire 406 mm (20\u2033) white<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Reifen-406-mm-20\">QU-AX Tire 406 mm (20\u2033) hash<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-tire-406-mm-20-white-hash\">QU-AX Tire 406 mm (20\u2033x2,25\u2033) Profi white<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-406-mm-20x225-Profi-yellow\">QU-AX Tire 406 mm (20\u2033x2,25\u2033) Profi yellow<\/a><\/li>\n<\/ul>\n<p>QU-AX Muni Starter:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-40657-mm-20x25-Q-Cross-black\">QU-AX Tire 406\u00d757 mm (20\u2033x2,5\u2033) Q-Cross, black<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-40657-mm-20x25-Q-Cross-black\">QU-AX Tire 406&#215;57 mm (20&#8243;x2,5&#8243;) Q-Cross Pro, black<\/a><\/li>\n<\/ul>\n<p>QU-AX Muni 19&#8243;, QX-series Muni, #rgb Muni, Kris Holm Trial Unicycle:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Maxxis-tire-38767-19x25-Creepy-Crawler\">Maxxis tire 387\u00d767 (19\u2033x2,5\u2033) Creepy Crawler<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Monty-Tyre-38767-19x26-Eagle-Claw-Pro-Race-V2\">Monty Tyre 387\u00d767 (19\u2033x2,6\u2033) Eagle Claw Pro Race V2<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/OBR-Tyre-38767-19x26-Gekok\">OBR Tyre 387\u00d767 (19\u2033x2,6\u2033) Gekok<\/a><\/li>\n<\/ul>\n<p>QU-AX Luxus 24&#8243;, OnlyOne 24&#8243;, Profi BB 24&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-507-mm-24-black\">QU-AX Tire 507 mm (24\u2033), black<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-SmallBlock8-507-mm-24-black\">QU-AX Tire SmallBlock8 507 mm (24\u2033), black<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Kranium-Tire-507-mm-24-white\">Kenda Kranium Tire 507 mm (24\u2033), white<\/a><\/li>\n<\/ul>\n<p>QU-AX Muni 24&#8243;, QX #rgb Muni 24&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Duro-Tire-50775-mm-24x30-RazorBack-Wildlife\">Duro Tire 507\u00d775 mm (24\u2033x3,0\u2033) RazorBack (better than Wildlife)<\/a><\/li>\n<\/ul>\n<p>QU-AX Muni 27,5&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Maxxis-tire-58461-275x24-High-Roller-II\">Maxxis tire 584\u00d761 (27,5\u2033x2,4\u2033) High Roller II<\/a><\/li>\n<\/ul>\n<p>QX #rgb Muni 27,5&#8243;:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Kenda-Tire-584x80-275x30-Kenda-Havoc\">Kenda Havoc 584\u00d768 mm (27,5\u2033x3,0\u2033)<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Schwalbe-Reifen-584x72-275x28-MagicMary-Speedgrip\">Schwalbe Magic Mary 584\u00d772 mm (27,5\u2033x2,8\u2033) Folding Tire<\/a><\/li>\n<\/ul>\n<p>QU-AX Muni 29&#8243; (current version with unicrown frame and wide tire clearance) as well as the 29&#8243; #rgb Muni:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/WTB-Ranger-TCS-62272-mm-29x30-Folding-Tire\">WTB Ranger TCS 622\u00d772 mm (29\u2033x3,0\u2033) Folding Tire<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Duro-Crux-62280-mm-29x325-Folding-Tire\">Duro Crux 622\u00d780 mm (29\u2033x3,25\u2033) Folding Tire<\/a><\/li>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/Maxxis-Tire-29x25-Hookworm\">Maxxis Tire 622&#215;63 mm (29\u2033x2,5&#8243;)<\/a><\/li>\n<\/ul>\n<p>QU-AX 36&#8243; unicycle, Monsterbike, Penny-Farthing:<\/p>\n<ul>\n<li><a href=\"https:\/\/qu-ax.de\/catalog\/QU-AX-Tire-787-mm-36-King-George-Ultimate-black\">QU-AX Tire 787 mm (36\u2033), King George black<\/a><\/li>\n<\/ul>\n<h3>Tubes<\/h3>\n<p><a href=\"https:\/\/qu-ax.de\/catalog\/Tubes-for-unicycles\">Find tubes for all of the above sizes here.<\/a><\/p>\n<h3>Valves<\/h3>\n<p>Three valves have gotten popularon bicycle: The car valve (also called Schrader), the Dunlop valve, and the Sclaverand (also called French valve). Each valve has its advantages and disadvantages. We use the car valve for our unicycles &#8211; it can be inflated at any petrol station. A Dunlop valve can also be used, as well as a French valve. Some rims on the aftermarket only have bores for the thinner French valve &#8211; here car valve or the German valve do not fit. This is also the reason a french valve has to be fitted with a washer reducing the valve hole size when used in a rim with wide car-valve hole.<\/p>\n<h3>Quality<\/h3>\n<p>A tyre can not only be of different quality rubber (durability, grip etc.) but also by the thread density, which is measured in TPI (<strong>t<\/strong>hreads <strong>p<\/strong>er <strong>i<\/strong>nch). Particularly high TPI numbers are not only more puncture-proof, but also more durable and sometimes have better rolling characteristics. Basic tires are equipped with a metal wire inside on each side to keep them round in the rim flange. Higher quality tyres are often foldable, i.e. instead of a wire a Kevlar or Aramid braid is worked into the bead &#8211; this is simply easier.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tyres- and Tubesizes for unicycles It\u2019s a bit complicated with the Tire-sizes of the unicycle. Same for bicycles \u2013 since mostly, their tires are used.\u00a0Tire sizes are mostly defined in Inches and with the Metric-system (ISO \/ ETRTO-size). E.T.R.T.O. means European Tire and Rim Technical Organisation &#8211; which was the base for the ISO-norms, the [&#8230;]\n","protected":false},"author":2,"featured_media":3091,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2094,719],"tags":[1032,2222,2223,2224,2220,2221,1924,2218,2219,855],"class_list":["post-3183","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","category-highlights","tag-color","tag-coloured","tag-muni-tires","tag-muni-tyres","tag-uni-tire","tag-uni-tires","tag-unicycle-tires","tag-unicycle-tyre","tag-unicycle-tyres","tag-unicycles"],"_links":{"self":[{"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/posts\/3183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/comments?post=3183"}],"version-history":[{"count":16,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/posts\/3183\/revisions"}],"predecessor-version":[{"id":3677,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/posts\/3183\/revisions\/3677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/media\/3091"}],"wp:attachment":[{"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/media?parent=3183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/categories?post=3183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qu-ax.de\/en\/wp-json\/wp\/v2\/tags?post=3183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}