{"product_id":"replacement-clamp-jaw-covers-57-2mm-for-master-shop-clamp","title":"Replacement Clamp Jaw Covers 57.2mm for Master Shop Clamp","description":"\u003cp\u003eReplaceable rubber jaw covers are the wear part on every Unior stand clamp; the rubber takes the daily grip-and-release work, picks up grit and frame cleaner residue, and eventually wears thin or tears at a corner. The 57.2 mm Replacement Clamp Jaw Covers are the cover size sized for the \u003cstrong\u003eMaster Shop Clamp 1693.1M\u003c\/strong\u003e with the shorter round-jaw geometry; the e-bike-era clamp head Unior redesigned in 2021 around heavy-bike workshop reality.\u003c\/p\u003e\n\u003cp\u003eWhen the rubber wears, you replace the rubber; the clamp itself stays. The covers slip onto the existing round jaws without tools and lock into the retention geometry the Master Shop Clamp uses.\u003c\/p\u003e\n\u003ch2\u003eWhy this size fits the Master Shop Clamp\u003c\/h2\u003e\n\u003cp\u003eBikerumor's 2021 coverage of the Master Shop Clamp launch framed the design move directly: \u003cem\u003e“Unior has updated their premium repair clamp with a more rugged, more rigid design to work with modern bikes and heavy e-bikes. The narrow 5 cm round jaws with replaceable rubber covers should fit just about any bike, while clamping it securely.”\u003c\/em\u003e The 57.2 mm cover sits on those 5 cm round jaws; the older square-jaw clamps in the 1693.1 \/ 1693.1S family use the 96 mm cover, and the Pro Shop QR (1693.1Q) uses the 70 mm cover.\u003c\/p\u003e\n\u003ch2\u003eWhy fresh covers matter\u003c\/h2\u003e\n\u003cp\u003eA worn jaw cover doesn't grip the frame tube the way a fresh one does. On heavy e-bikes (the use case the Master Shop Clamp was redesigned for), this matters more: clamping pressure is higher, and a glazed or torn cover fails earlier under that load. For carbon frames, the failure mode is a cored seat tube; for aluminum, a clamp-shaped dent.\u003c\/p\u003e\n\u003ch2\u003eSizing: confirm before you order\u003c\/h2\u003e\n\u003cp\u003eThis is the \u003cstrong\u003e57.2 mm cover\u003c\/strong\u003e for the Master Shop Clamp 1693.1M. Two other cover sizes exist for different Unior clamp variants:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e70 mm covers\u003c\/strong\u003e fit the Pro Shop Clamp (1693.1Q) and the 70 mm-jaw variants of the 1693.1 \/ 1693.1S cam-style clamps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e96 mm covers\u003c\/strong\u003e fit the older square-style cam-clamp jaws on the 1693.1 \/ 1693.1S with the 90 mm jaw height.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 57.2 mm cover is the right buy if your clamp is the Master Shop Clamp (round jaws, ~5 cm tall, fitted to the 1693EL Electric Repair Stand and sold standalone as the 1693.1M).\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArticle number: 1693.11 (57.2 mm variant for Master Shop Clamp)\u003c\/li\u003e\n\u003cli\u003eMaterial: rubber\u003c\/li\u003e\n\u003cli\u003eCompatibility: Unior Master Shop Clamp 1693.1M (also fitted to 1693EL Electric Repair Stand)\u003c\/li\u003e\n\u003cli\u003eSold as: a pair (one set covers one clamp head)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e pair of 57.2 mm replacement rubber jaw covers.\u003c\/p\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The Master Shop Clamp's round jaws and replaceable covers were part of the 2021 redesign that took the clamp from “shop floor general purpose” to “e-bike-era workshop standard”; the 57.2 mm cover is the sizing match for that design.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eThe Master Shop Clamp's covers see more load per clamping cycle than the older square-jaw covers because e-bikes are heavier and demand more pressure to hold. The service interval is faster on a Master Shop-equipped stand running heavy bikes than on a 1693.1S running road bikes; shops typically replace these every twelve to eighteen months in heavy e-bike service, versus every three to five years for a road-bike-only cam clamp. Shopping for the clamp head itself or the stand that carries it? The buying guide makes the e-bike-stand decision concrete: \u003ca href=\"\/blogs\/tech-tips\/how-to-choose-a-bike-repair-stand\"\u003eHow to choose a bike repair stand →\u003c\/a\u003e\u003c\/p\u003e","brand":"Unior","offers":[{"title":"57.2mm for Master Shop Clamp","offer_id":44140742443052,"sku":"626337","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/5786\/5260\/products\/1693.11.jpg?v=1642728454","url":"https:\/\/uniorusa.com\/products\/replacement-clamp-jaw-covers-57-2mm-for-master-shop-clamp","provider":"Unior USA","version":"1.0","type":"link"}