{"product_id":"trek-fx-sport-al-3-shimano-105-alpha-aluminium-flat-bar-fitness-hybrid-bike","title":"Trek FX Sport AL 3 – Shimano 105, Alpha Aluminium, Flat Bar Fitness Hybrid Bike","description":"\u003cp\u003eThe \u003cstrong\u003eTrek FX Sport AL 3\u003c\/strong\u003e is Trek's top-specification aluminium flat bar fitness bike — a fast, efficient hybrid designed for riders who want road bike performance in a more upright, accessible package. The frame is \u003cstrong\u003eAlpha Aluminium\u003c\/strong\u003e with Trek's \u003cstrong\u003eActive geometry\u003c\/strong\u003e, which positions the rider slightly more upright than a road bike while maintaining an efficient, forward-leaning posture suited to faster riding. The result is a bike that is quicker and more responsive than a comfort hybrid, but less aggressive and more accessible than a drop-bar road bike. The drivetrain is \u003cstrong\u003eShimano 105\u003c\/strong\u003e — the same groupset found on mid-range road bikes — providing precise, reliable shifting across a wide gear range suited to both urban riding and longer fitness rides. The bike uses \u003cstrong\u003e700c wheels\u003c\/strong\u003e with narrower, faster-rolling tyres suited to tarmac and smooth surfaces. Available in \u003cstrong\u003e5 sizes\u003c\/strong\u003e (XS, S, M, L, XL) and \u003cstrong\u003e3 colours\u003c\/strong\u003e: Buff Beige, Cobra Blood, and Keswick.\u003c\/p\u003e\n\n\u003cp\u003eThe FX Sport AL 3 sits at the top of the aluminium FX Sport range, stepping up from lower-spec FX models with the Shimano 105 groupset and a more performance-focused specification. It is well-suited to riders who commute regularly and also want to use the same bike for fitness rides and longer weekend routes, without the commitment of a full road bike position. For the carbon-framed step-up, see the \u003ca href=\"\/products\/trek-fx-sport-sl-4-hybrid-bike-with-1x-drivetrain-for-commuting-and-fitness\"\u003eTrek FX Sport SL 4\u003c\/a\u003e with a carbon frame and 1x drivetrain. Browse our full \u003ca href=\"\/collections\/hybrid-bikes\"\u003ehybrid bikes collection\u003c\/a\u003e and \u003ca href=\"\/collections\/fitness-bikes\"\u003efitness bikes range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It's Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFast urban commuting and fitness riding — Alpha Aluminium frame with Active geometry\u003c\/li\u003e\n\u003cli\u003eShimano 105 groupset — precise, reliable shifting across a wide gear range\u003c\/li\u003e\n\u003cli\u003eRiders who want road bike performance without a drop-bar position\u003c\/li\u003e\n\u003cli\u003e700c wheels with fast-rolling tyres for tarmac and smooth surfaces\u003c\/li\u003e\n\u003cli\u003e5 sizes: XS, S, M, L, XL\u003c\/li\u003e\n\u003cli\u003e3 colours: Buff Beige, Cobra Blood, Keswick\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It's NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOff-road or trail riding — road-specific tyres and geometry\u003c\/li\u003e\n\u003cli\u003eRiders wanting a fully upright comfort position — Active geometry is efficient, not relaxed\u003c\/li\u003e\n\u003cli\u003eCarrying heavy loads — no rack mounts on the Sport AL 3; consider the Trek FX 3 Disc for a more practical commuter setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the FX Sport AL 3 and the \u003ca href=\"\/products\/trek-fx-sport-sl-4-hybrid-bike-with-1x-drivetrain-for-commuting-and-fitness\"\u003eFX Sport SL 4\u003c\/a\u003e?\u003c\/strong\u003e\u003cbr\u003eThe FX Sport AL 3 uses an Alpha Aluminium frame; the FX Sport SL 4 steps up to a carbon frame, which is lighter and provides additional vibration damping for a more refined ride. The SL 4 also uses a 1x drivetrain (single chainring, no front derailleur) for a cleaner, lower-maintenance setup. The AL 3 is the top aluminium build; the SL 4 is the entry into the carbon FX Sport range.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is Trek's Active geometry?\u003c\/strong\u003e\u003cbr\u003eActive geometry is Trek's term for the FX Sport's riding position — more forward-leaning and efficient than a comfort hybrid, but less aggressive than a road bike. The handlebar height and reach are set to encourage an engaged, efficient pedalling position while remaining accessible for riders who are not comfortable with a full road bike posture. It suits riders who want to ride faster and further than a typical hybrid allows, without committing to a drop-bar bike.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I fit mudguards and a rack to the FX Sport AL 3?\u003c\/strong\u003e\u003cbr\u003eThe FX Sport AL 3 is a performance-focused fitness bike and has limited mounting points compared to the standard FX range. Mudguard compatibility depends on tyre clearance and frame eyelets — clip-on mudguards are typically the most practical option. A rear rack is not supported on the Sport AL 3. If rack and mudguard compatibility is important, the Trek FX 3 Disc or FX 4 Disc are better suited.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat size should I choose?\u003c\/strong\u003e\u003cbr\u003eThe FX Sport AL 3 is available in XS, S, M, L, and XL. As a general guide: XS suits riders approximately 152–162cm; S suits 162–170cm; M suits 170–178cm; L suits 178–186cm; XL suits 186cm+. Trek provides a detailed fit guide on their website. If you are between sizes or unsure, contact us before ordering and we can advise based on your height and inseam.\u003c\/p\u003e","brand":"Trek","offers":[{"title":"XS \/ Buff Beige","offer_id":45739507155119,"sku":"5339889","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"XS \/ Cobra Blood","offer_id":45739507187887,"sku":"5339894","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"XS \/ Keswick","offer_id":45739507220655,"sku":"5339884","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"S \/ Buff Beige","offer_id":45739506958511,"sku":"5339890","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"S \/ Cobra Blood","offer_id":45739506991279,"sku":"5339895","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"S \/ Keswick","offer_id":45739507024047,"sku":"5339885","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"M \/ Buff Beige","offer_id":45739506860207,"sku":"5339891","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"M \/ Cobra Blood","offer_id":45739506892975,"sku":"5339896","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"M \/ Keswick","offer_id":45739506925743,"sku":"5339886","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"L \/ Buff Beige","offer_id":45739506761903,"sku":"5339892","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"L \/ Cobra Blood","offer_id":45739506794671,"sku":"5339897","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"L \/ Keswick","offer_id":45739506827439,"sku":"5339887","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"XL \/ Buff Beige","offer_id":45739507056815,"sku":"5339893","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"XL \/ Cobra Blood","offer_id":45739507089583,"sku":"5339898","price":1000.0,"currency_code":"GBP","in_stock":true},{"title":"XL \/ Keswick","offer_id":45739507122351,"sku":"5339888","price":1000.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/FX3Sport-26-58592-B-Primary.png?v=1768526610","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/trek-fx-sport-al-3-shimano-105-alpha-aluminium-flat-bar-fitness-hybrid-bike","provider":"Swinnerton Cycles","version":"1.0","type":"link"}