{"product_id":"sonic-ergo-39a","title":"Profile Design Sonic\/Ergo 39a clip-on aerobar system — 400mm extensions, 39° grip, adjustable Ergo armrests","description":"\u003cp\u003e\u003cstrong\u003eThe Profile Design Sonic\/Ergo\/39a is a lightweight, highly adjustable clip-on aerobar system that helps cyclists find faster, more comfortable time-trial and triathlon positions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt from durable aluminium and pairing the Sonic bracket with Ergo armrests, this aerobar was engineered to reduce frontal area while giving a broad range of fit options. Its 39° extension angle and 400mm extensions provide a balance of aerodynamic posture and ergonomic hand placement. With precise micro-adjustments across width, offset and stack, the Sonic\/Ergo\/39a suits riders who need repeatable, fine-tuned setups on road or race bikes.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Sonic\/Ergo\/39a improve aerodynamics without sacrificing comfort?\u003c\/h3\u003e\n\u003cp\u003eThe design narrows your frontal profile through slim, low-profile brackets and straight extensions, while the Ergo armrests give supportive contact points to sustain a tucked position. The 39° grip angle helps riders hold either a tucked or more open posture depending on preference.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMinimal frontal area from compact Sonic bracket geometry\u003c\/li\u003e\n  \u003cli\u003eErgo armrests for wider pressure distribution and support\u003c\/li\u003e\n  \u003cli\u003e39° grip angle balances speed and control\u003c\/li\u003e\n  \u003cli\u003e400mm extensions allow longer reach for aerodynamic positioning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat level of adjustability can I expect for fit and fine-tuning?\u003c\/h3\u003e\n\u003cp\u003eThis model provides an unusually large fit range for a clip-on bar, letting you dial in width, offset, rotation and stack in small increments. The top bolt and bracket system enable quick rotation and extension length changes, while the armrest platform moves in precise steps for repeatable setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eArmrest offset: -70mm to -17.5mm in 7.5mm steps\u003c\/li\u003e\n  \u003cli\u003eArmrest width: 124mm to 290mm in 18.5mm steps (with 100mm extensions)\u003c\/li\u003e\n  \u003cli\u003eArmrest stack: 60mm (no riser) up to 130mm with riser kits in 5mm steps\u003c\/li\u003e\n  \u003cli\u003eTop bolt allows easy extension rotation and length adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much does the Sonic\/Ergo\/39a weigh and what are the core specs?\u003c\/h3\u003e\n\u003cp\u003eThe unit is engineered to be light without compromising strength; total assembly weight is competitive for aluminium clip-on bars. The 39a uses Profile Design’s latest aluminium extension set and ships with Ergo armrests and 10mm pads for comfort.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWeight: 564 g (complete bracket, extensions and armrests)\u003c\/li\u003e\n  \u003cli\u003eExtension length: 400 mm\u003c\/li\u003e\n  \u003cli\u003eGrip angle: 39° for the extensions\u003c\/li\u003e\n  \u003cli\u003eIncludes Ergo armrests with 10 mm pads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and compatibility with my bike?\u003c\/h3\u003e\n\u003cp\u003eAs a clamp-on aerobar system, the Sonic\/Ergo\/39a mounts to most round or slightly oval aero bars with straightforward clamping hardware. Adjustment uses common hex tools and the modular design means you can combine risers or aftermarket kits to expand stack and reach.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClip-on clamp fits standard handlebars; check diameter compatibility\u003c\/li\u003e\n  \u003cli\u003eAdjustments use accessible top bolts and allen fasteners\u003c\/li\u003e\n  \u003cli\u003eRiser kits available for increased stack height and fine fit tuning\u003c\/li\u003e\n  \u003cli\u003eDesigned for repeatable setups and easy removal between bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Profile Design Sonic\/Ergo\/39a is ideal for time trialists, triathletes and committed road riders who want a highly configurable, lightweight aluminium clip-on aerobar. If you value a broad range of micro-adjustments to refine aerodynamics and sustain comfort during long efforts, this bar delivers professional-level fit options without moving to full integrated aerobars.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the Sonic\/Ergo\/39a fit different handlebar diameters?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—its clip-on clamp fits most standard round bars; confirm your bar diameter and use supplied or optional shims as needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many position combinations are possible?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: With armrest and riser options, the system offers roughly 1,500 possible configurations for detailed fit tuning.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Profile Design","offers":[{"title":"Default Title","offer_id":48031029821601,"sku":"B0CWPN5KBB","price":437.96,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/profile-design-sonic-front-view.jpg?v=1791420081","url":"https:\/\/canadiansporting.ca\/products\/sonic-ergo-39a","provider":"Canadian Sporting","version":"1.0","type":"link"}