{"product_id":"zipp-service-course-sl-stem-150mm-31-8-clamp-6-1-1-8-aluminum-matte-blk-b2","title":"Zipp Service Course SL Stem - 150mm 31.8 Clamp +\/-6 1 1\/8\" Aluminum Matte BLK B2","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003cstyle\u003e\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@400;600;700;800\u0026family=Barlow:wght@300;400;500\u0026display=swap');\n:root { --black: #0a0a0a; --white: #ffffff; --mid: #f5f5f5; --border: #e0e0e0; --text-muted: #777; --text-body: #222; }\n* { box-sizing: border-box; margin: 0; padding: 0; }\n.spur-wrap { font-family: 'Barlow', sans-serif; background: var(--white); color: var(--black); max-width: 1100px; margin: 0 auto; padding: 48px 24px; }\n.spur-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 48px; border-bottom: 1px solid var(--border); padding-bottom: 24px; flex-wrap: wrap; gap: 12px; }\n.spur-title { font-family: 'Barlow Condensed', sans-serif; font-size: clamp(28px, 5vw, 48px); font-weight: 800; letter-spacing: -0.02em; line-height: 1; text-transform: uppercase; }\n.spur-meta { font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); }\n.spur-tabs { display: flex; gap: 4px; margin-bottom: 32px; }\n.spur-tab { font-family: 'Barlow Condensed', sans-serif; font-size: 14px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 10px 24px; background: var(--mid); color: var(--text-muted); border: 1px solid var(--border); cursor: pointer; transition: all 0.15s; border-radius: 2px; }\n.spur-tab:hover { color: var(--black); border-color: #aaa; }\n.spur-tab.active { background: var(--black); color: var(--white); border-color: var(--black); }\n.spur-panel { display: none; }\n.spur-panel.active { display: block; }\n.spec-row { display: grid; grid-template-columns: 200px 1fr; border-bottom: 1px solid var(--border); transition: background: 0.1s; }\n.spec-row:hover { background: var(--mid); }\n.spec-key { font-size: 12px; font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-muted); padding: 12px 16px 12px 0; align-self: start; }\n.spec-val { font-size: 14px; font-weight: 300; color: var(--text-body); padding: 12px 0; line-height: 1.5; }\n@media (max-width: 600px) { .spec-row { grid-template-columns: 1fr; } .spec-key { padding-bottom: 2px; } .spec-val { padding-top: 0; padding-bottom: 12px; } }\n\u003c\/style\u003e\n\u003cdiv class=\"spur-wrap\"\u003e\n\u003cdiv class=\"spur-header\"\u003e\n\u003cdiv class=\"spur-title\"\u003eService Course SL Stem\u003c\/div\u003e\n\u003cdiv class=\"spur-meta\"\u003eZipp | Aluminum | 31.8mm Clamp | ±6° \/ ±17° | Matte Black\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spur-tabs\"\u003e\n\u003cbutton class=\"spur-tab active\" onclick=\"showPanel('description', this)\"\u003eDescription\u003c\/button\u003e\n\u003cbutton class=\"spur-tab\" onclick=\"showPanel('features', this)\"\u003eFeatures\u003c\/button\u003e\n\u003cbutton class=\"spur-tab\" onclick=\"showPanel('specs', this)\"\u003eSpecs\u003c\/button\u003e\n\u003cbutton class=\"spur-tab\" onclick=\"showPanel('care', this)\"\u003eCare\u003c\/button\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"panel-description\" class=\"spur-panel active\"\u003e\n\u003cdiv style=\"padding: 16px 0;\"\u003e\n\u003cp style=\"font-size: 14px; font-weight: 300; color: var(--text-body); line-height: 1.6;\"\u003eZipp's Service Course SL Stem is crafted from 7075 aluminum and features an optimized shape that's both strong and lightweight, resulting in a best-in-class 1.85 grams per newton meter of stiffness. That means no-flex sprints and accelerations — every watt transfers directly to the bars.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; font-weight: 300; color: var(--text-body); line-height: 1.6; margin-top: 12px;\"\u003eTo meet every rider's fit needs, the stem is available in ±6° and ±17° angles in seven lengths from 70 to 130mm, plus 140mm and 150mm for the ±6° only. This stem is a favorite of Zipp ambassadors and professional athletes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"panel-features\" class=\"spur-panel\"\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eMaterial\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e7075 aluminum — strong and lightweight construction\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eStiffness\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eBest-in-class 1.85 g\/Nm — zero flex for sprinting and accelerations\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eAngles\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e±6° and ±17° options\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eLengths\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e70, 80, 90, 100, 110, 120, 130mm (all angles); 140mm and 150mm (±6° only)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eClamp diameter\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e31.8mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSteerer\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e1-1\/8\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eFinish\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eMatte Black with stealth decals\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eHardware\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eTitanium\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eFace plate bolts\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e27mm horizontal spacing, 42mm vertical spacing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWeight\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e135g (based on ±6° 100mm)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"panel-specs\" class=\"spur-panel\"\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eMaterial\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eAl-7075\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eStem angle\/rise\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e±6°, ±17°\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eLengths\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e70, 80, 90, 100, 110, 120, 130, 140, 150mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eClamp diameter\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e31.8mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSteerer clamp\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e1-1\/8\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eFinish\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eMatte Black with stealth decals\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eHardware\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eTitanium\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eFace plate horizontal\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e27mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eFace plate vertical\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e42mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWeight\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e135g (±6° 100mm)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"panel-care\" class=\"spur-panel\"\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eApply grease to steerer tube and stem bolt threads. Torque stem clamp to manufacturer spec (typically 5-8 Nm). Face plate bolts should be tightened evenly in a crossing pattern.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eInspection\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003ePeriodically check all bolts for tightness. Inspect for any cracks, deformation, or corrosion — especially after crashes or heavy loads.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCompatibility\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eUse with 31.8mm clamp diameter handlebars and 1-1\/8\" steerer tubes. Confirm stack height and reach fit for your frame geometry.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eStorage\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eStore in a cool, dry place. Avoid hanging by the clamp area to prevent stress on the aluminum structure.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript\u003e\nfunction showPanel(id, btn) {\n  document.querySelectorAll('.spur-panel').forEach(p =\u003e p.classList.remove('active'));\n  document.querySelectorAll('.spur-tab').forEach(t =\u003e t.classList.remove('active'));\n  document.getElementById('panel-' + id).classList.add('active');\n  btn.classList.add('active');\n}\n\u003c\/script\u003e","brand":"Zipp","offers":[{"title":"Default Title","offer_id":51341462569280,"sku":"00.6518.039.008","price":105.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7487\/5549\/files\/ServiceCourseSLSterm1.jpg?v=1777406709","url":"https:\/\/spokex.com\/products\/zipp-service-course-sl-stem-150mm-31-8-clamp-6-1-1-8-aluminum-matte-blk-b2","provider":"SX Collective","version":"1.0","type":"link"}