{"product_id":"topeak-fixer-set-for-defender-m1-mudguard-replacement-mounting-hardware-19-6-35mm-steer-tube","title":"Topeak Fixer Set for DeFender M1 Mudguard – Replacement Mounting Hardware, 19.6–35mm Steer Tube","description":"\u003cp\u003eThe \u003cstrong\u003eTopeak Fixer Set for DeFender M1\u003c\/strong\u003e is the replacement mounting hardware for the \u003cstrong\u003eTopeak DeFender M1\u003c\/strong\u003e front mudguard — the bracket and fixer components that clamp the mudguard to the fork's steer tube or crown. The DeFender M1 mounts directly to the fork steer tube without requiring mudguard eyelets, making it compatible with road and gravel bikes that lack traditional mudguard mounts. The fixer set covers two steer tube diameter ranges: \u003cstrong\u003e19.6–26mm\u003c\/strong\u003e and \u003cstrong\u003e27.7–35mm\u003c\/strong\u003e, accommodating standard 1-inch threaded, 1¼-inch, and standard 1³⁄₁₆-inch ahead forks across both ranges. This is the correct spare if the original fixer has been lost, damaged, or broken.\u003c\/p\u003e\n\n\u003cp\u003eA genuine \u003cstrong\u003eTopeak\u003c\/strong\u003e spare part, ensuring correct fit and clamping force for the DeFender M1. Installation uses the same process as the original — the fixer clamps around the steer tube and the mudguard body clips into the fixer bracket. No tools required for the mudguard attachment itself; the fixer bracket requires a screwdriver or hex key to tighten the clamp around the steer tube. Compatible with the \u003cstrong\u003eDeFender M1 only\u003c\/strong\u003e — not compatible with other Topeak DeFender models (M2, iGlow, etc.) which use different fixer designs. Browse our full \u003ca href=\"\/collections\/mudguards\"\u003emudguards collection\u003c\/a\u003e for the complete DeFender range and other mudguard options.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It's Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing lost, damaged, or broken fixer hardware on the Topeak DeFender M1\u003c\/li\u003e\n\u003cli\u003eSteer tube diameters of 19.6–26mm and 27.7–35mm\u003c\/li\u003e\n\u003cli\u003eBikes without mudguard eyelets — steer tube mount, no eyelets required\u003c\/li\u003e\n\u003cli\u003eGenuine Topeak spare — correct fit and clamping force for DeFender M1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It's NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSteer tubes outside the 19.6–26mm and 27.7–35mm ranges\u003c\/li\u003e\n\u003cli\u003eOther Topeak DeFender models (M2, iGlow, etc.) — different fixer designs, not interchangeable\u003c\/li\u003e\n\u003cli\u003eNon-Topeak mudguards — specific to the DeFender M1 mounting system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if this fits my fork?\u003c\/strong\u003e\u003cbr\u003eMeasure the outer diameter of your fork's steer tube — the tube that passes through the head tube and into the stem. Standard 1³⁄₁₆-inch ahead forks (the most common modern standard) have a steer tube outer diameter of approximately 28.6mm, which falls within the 27.7–35mm range. Older 1-inch threaded forks measure approximately 22.2mm outer diameter, within the 19.6–26mm range. If unsure, measure with calipers before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this compatible with the DeFender M2 or other Topeak mudguards?\u003c\/strong\u003e\u003cbr\u003eNo — this fixer set is specific to the \u003cstrong\u003eDeFender M1\u003c\/strong\u003e. The DeFender M2, iGlow, and other Topeak mudguard models use different fixer designs that are not interchangeable. Check your mudguard model before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat tools are needed for installation?\u003c\/strong\u003e\u003cbr\u003eThe fixer bracket clamps around the steer tube using a small bolt that requires a screwdriver or 3mm hex key to tighten. The mudguard body itself clips into the fixer without tools. Tighten the clamp bolt firmly but do not overtighten — the bracket is plastic and can crack if over-torqued.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use the DeFender M1 on a bike with mudguard eyelets?\u003c\/strong\u003e\u003cbr\u003eYes — the DeFender M1 mounts to the steer tube regardless of whether the bike has mudguard eyelets. The steer tube mount is independent of the eyelet mounts. However, if your bike has eyelets and you want full-length mudguard coverage, a traditional eyelet-mounted mudguard will provide better coverage than the DeFender M1's minimalist design.\u003c\/p\u003e","brand":"Topeak","offers":[{"title":"Default Title","offer_id":45472064405679,"sku":"TRK-DF01","price":5.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1560858279-36959300.jpg?v=1768515001","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/topeak-fixer-set-for-defender-m1-mudguard-replacement-mounting-hardware-19-6-35mm-steer-tube","provider":"Swinnerton Cycles","version":"1.0","type":"link"}