{"product_id":"fifty-fifty-aluminum-alloy-mountain-bike-stem-50mm-short-0-rise-160g-31-8mm-clamp","title":"FIFTY-FIFTY Aluminium Alloy Mountain Bike Stem 50mm Short 0° Rise — 160g, 31.8mm Clamp","description":"\u003cp\u003e\u003cstrong\u003eThe FIFTY-FIFTY Aluminum Alloy Mountain Bike Stem is a precision-machined, ultra-light 50mm stem designed for aggressive trail control and quick handling.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis short bicycle stem pairs a full CNC-machined 6061-T6 aluminum body with Finite Element Analysis-driven shaping to shave grams while preserving stiffness. At just 160 g (5.64 oz) it gives riders a rigid front-end connection for sharp steering feedback without adding weight, and the 31.8 mm clamp and 28.6 mm steerer compatibility fit modern MTBs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this stem change handling on technical trails?\u003c\/h3\u003e\n\u003cp\u003eA shorter 50mm reach brings the handlebars closer, sharpening steering response and improving leverage on tight switchbacks. The zero-degree rise keeps your cockpit low and stable for descending while maintaining pedaling comfort on climbs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e50mm length for quicker steering inputs\u003c\/li\u003e\n\u003cli\u003e0° rise for a flatter, more stable front end\u003c\/li\u003e\n\u003cli\u003eRigid aluminum construction reduces flex under load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it light enough for cross-country or bikepacking builds?\u003c\/h3\u003e\n\u003cp\u003eYes — the stem’s fully machined 6061-T6 aluminum construction and CNC optimization result in a remarkably low mass of 160 g, making it suitable for weight-conscious builds. You get a strong component without the penalty of unnecessary material.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOnly 160 g (5.64 oz) helps lower rotating and overall bike weight\u003c\/li\u003e\n\u003cli\u003eFEA-informed design removes excess material while keeping strength\u003c\/li\u003e\n\u003cli\u003eIdeal for XC, light trail, and mixed-terrain setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it fit my bike and bars?\u003c\/h3\u003e\n\u003cp\u003eThe stem clamps a 31.8 mm handlebar and fits a 28.6 mm (1-1\/8\") steerer tube, matching the most common modern MTB standards. The faceplate uses a close-gap layout with four bolts for secure clamping while simplifying installation when torqued correctly.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHandlebar clamp diameter: 31.8 mm (1-1\/4\")\u003c\/li\u003e\n\u003cli\u003eSteerer tube diameter: 28.6 mm (1-1\/8\")\u003c\/li\u003e\n\u003cli\u003eFour-bolt faceplate with close-gap design for easier assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eFIFTY-FIFTY’s close-gap faceplate streamlines positioning the handlebar before final torque, reducing the chance of trapped spacers or misalignment. Routine checks of bolt torque and a clean clamp face are all that’s required to keep it performing reliably.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClose-gap faceplate simplifies bar insertion and alignment\u003c\/li\u003e\n\u003cli\u003eFour bolts allow even clamping pressure across the bar\u003c\/li\u003e\n\u003cli\u003eMinimal upkeep: periodic torque checks recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This stem suits mountain bikers seeking a lightweight, stiff short-stem solution for faster steering and a compact cockpit. It’s a good match for trail and cross-country riders upgrading from longer or heavier stems, bikepackers trimming grams, and anyone using modern 31.8 mm bars and 1-1\/8\" steerers who wants a no-nonsense, machined aluminum option.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eMaterial: 6061-T6 aluminum, fully machined\u003c\/li\u003e\n\u003cli\u003eManufacturing: CNC milled; FEA used during development to optimize weight-to-strength\u003c\/li\u003e\n\u003cli\u003eWeight: 160 g (5.64 oz)\u003c\/li\u003e\n\u003cli\u003eDimensions: 50 mm length, 0° rise\u003c\/li\u003e\n\u003cli\u003eCompatibility: 28.6 mm (1-1\/8\") steerer tube, 31.8 mm (1-1\/4\") handlebar clamp\u003c\/li\u003e\n\u003cli\u003eDesign notes: Close-gap faceplate and four-bolt clamp for secure fit and easier installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What handlebars and steerer sizes does this stem fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits 31.8 mm handlebars and 28.6 mm (1-1\/8\") steerer tubes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much does the FIFTY-FIFTY stem weigh?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The stem weighs 160 g (5.64 oz).\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FIFTY-FIFTY","offers":[{"title":"Default Title","offer_id":59361271284060,"sku":"B08218ZTV6","price":79.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1059\/5604\/9244\/files\/fifty-fifty-front-view-stem.jpg?v=1791206653","url":"https:\/\/sportium.co.uk\/products\/fifty-fifty-aluminum-alloy-mountain-bike-stem-50mm-short-0-rise-160g-31-8mm-clamp","provider":"Sportium Sports And Outdoors","version":"1.0","type":"link"}