{"product_id":"sl-k-light-tandem-rear-crankset","title":"FSA SL-K Light Tandem Rear Crankset","description":"\u003cp\u003eThe SL-K Light Tandem Rear Crankset is FSA's crankset built specifically for the rear position on a tandem bike, where load and chainline requirements differ from a standard single crankset. It uses hollow carbon arms with a UD carbon finish, keeping weight down despite the demands of tandem use.\u003c\/p\u003e\u003cp\u003eThe chainring setup is built around a 110mm asymmetric BCD (A.B.S.) that supports four different chainlines (44, 47, 50, and 53mm), plus a separate timing chainring at 104mm BCD with a 53.3mm chainline for the connection to the front rider's crank. An English-threaded bottom bracket is included.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTandem riders and builders who need a purpose-built rear crankset rather than adapting a standard single-bike crank\u003c\/li\u003e\n\u003cli\u003eRiders who need chainline flexibility across the tandem's timing and drive chainrings\u003c\/li\u003e\n\u003cli\u003eNot applicable to standard single-rider bikes — this is a tandem-specific rear crankset\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eWhat to Look For\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eChainline configuration: the 110mm A.B.S. BCD supports four chainline options (44\/47\/50\/53mm) — confirm which matches your tandem's frame geometry\u003c\/li\u003e\n\u003cli\u003eTiming chainring: separate 104mm BCD timing ring at a 53.3mm chainline connects to the front crank — make sure this pairs correctly with your timing setup\u003c\/li\u003e\n\u003cli\u003eBottom bracket: an English-threaded BB is included, so confirm your tandem frame uses that standard\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eArms:\u003c\/strong\u003e Hollow carbon arms with a UD carbon finish keep the crankset's weight reasonable despite the higher loads tandems put through the drivetrain.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eChainrings:\u003c\/strong\u003e AL7075 100% CNC-machined chainrings at 50\/34T, mounted on a 110mm asymmetric BCD that supports four chainline configurations (44, 47, 50, 53mm).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTiming ring:\u003c\/strong\u003e A separate 104mm BCD timing chainring at a 53.3mm chainline handles the connection between the two riders' cranksets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHardware:\u003c\/strong\u003e AL7075 Torx T-30 alloy chainring bolts and an included English-threaded bottom bracket round out what's needed for installation.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eRider Intent Summary\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBiggest strengths: genuine chainline flexibility (four configurations) built specifically for tandem drivetrain geometry\u003c\/li\u003e\n\u003cli\u003eTradeoffs: at 870 grams, it's a tandem-specific product, so weight comparisons to single-bike cranksets aren't meaningful\u003c\/li\u003e\n\u003cli\u003eWhat makes it different: most cranksets aren't tandem-specific — this one is engineered around the timing ring and chainline needs unique to two-rider bikes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eVictory's Take\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eWe recommend the SL-K Light Tandem Rear Crankset through Victory Bicycle Studio to tandem owners who need a rear crank actually engineered for tandem chainline and timing requirements, not a single-bike crank pressed into service.\u003c\/p\u003e","brand":"FSA","offers":[{"title":"Default Title","offer_id":53552360030515,"sku":"33200321553031","price":601.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3685\/0739\/files\/media_a0d7c001-e338-4972-98f6-2a21d209e40a.jpg?v=1782439991","url":"https:\/\/victorybicyclestudio.com\/products\/sl-k-light-tandem-rear-crankset","provider":"Victory Bicycle Studio","version":"1.0","type":"link"}