WHY CYCLES Big Iron GX Eagle

Brand: Why Cycles
€6 029,95 –20 % €4 823,96 €3 986,74 excl. VAT
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Detailed information

Product detailed description

Built on new standard 27.5" thick wheels with clearance for up to 27.5×4.5" or 26×5" tires, this modern titanium steed will be your trusted companion in any endeavor to ride on snow or soft surfaces. The team at Why goes back to the early days of fat bikes in Alaska. The Big Iron is the culmination of many years of experience with this type of biking. Combined with modern design features and technical optimization of the bike's individual components, the Why - Big Iron is ready for a great ride.

It is named after the famous song by Martha Robbins. The Big Iron is designed to be the ultimate riding tool. Whether it's a short weekend trip on a local groomed trail or an epic 1,100-mile journey through Alaska. Modern geometry, a stiff yet flexible titanium frame, and a lifetime warranty make it a bike you'll be proud of and want to take its big tires everywhere.





  • Frame – WHY Big Iron
  • Fork - ENVE Carbon Fat Fork
  • Headset - CaneCreek řady 40 IS42 / IS52
  • Wheels - dvojkolí Sun Ringle Mulefut
  • Tubes - součástí je bezdušová sada
  • Tires - Terrene Cake Eater Lite 27,5 x 4,5 ″ 120 tpi
  • Bar - SRAM Descendant Alloy 35x800mm
  • Představec - SRAM Descendant 35mmx40mm
  • Post - Crank Brothers Highline 7 31,6 x 125 mm, 150 mm
  • Saddle - Ergon SM10 Standard Black
  • Shifters - SRAM GX Eagle
  • Brakes - SRAM G2 R
  • Rotors - Avid Centerline 160 mm
  • Rear Derailleur - SRAM GX Eagle
  • Chain - SRAM GX Eagle
  • Cassette - SRAM GX Eagle 10-52
  • Crankset - Truvativ Crank Stylo 6K Alloy Dub FAT5 170 30t
  • Botton Bracket - SRAM Threaded DUB 100mm BSA Standard
  • Grips - Ergon GE10



  • Integrated standard head assembly 42 mm upper bowl, 52 mm lower bowl
  • Standard centre axis with BSA 100 mm thread
  • Axle spacing increase 12 mm x 197 mm
  • Foot 12mm fixed axle, 1.75 thread pitch, compatible with adjustable feed and belt drive
  • Bottle holders - bottle holders on seat tube, top down tube, down tube. Third bottle holder on down tube for attaching accessories.
  • Handles - all standard handles on rack and fender
  • Seatpost - 31.6 mm
  • Saddle clamp - 34.9 mm
  • Brake - 180 mm max rear with adapter, standard for direct mounting
  • Ground clearance - Max tire size 27.5 x 4.5″, 26 x 5.0″ or 29 x 3.0″ Big-Iron-Geo-Chart
  • Pedals - without pedals
  • Sizes S / M / L / XL
  • Frame Warranty - Lifetime Warranty (Details Here


** Specifications are subject to change without notice**





The Big Iron uses truly modern mountain bike geometry adapted for use with huge 27.5 fat tires. The reach is longer than most other fat bikes, allowing the same body position with wider bars and a short track. The handling benefits of this setup are magnified when riding on snow with a sometimes unstable front tire at low pressure. The chainstays are adjustable from 445mm to 460mm, so you can really dial in the rear shock of this bike based on your chosen tire size. The lower seat tube and curved top tube allow for excellent standover height and allow you to use a longer than normal seat tube and still retain a nice big front triangle if you choose to use a frame bag to store your gear.



We make our bikes from the best possible materials for the terrain we ride. We use the highest quality grade 9 3/2.5 titanium for our frame tubes and 6/4 titanium for the head tube, center compound shell and machined bits all around the frame. Wonder material has so many outstanding ride quality attributes: 43% lighter than steel, higher strength-to-weight ratio than aluminum, significantly more resistant to impact damage than carbon, and the best vibration damping properties of the three materials. We think you'll agree that we've achieved our goal of creating titanium frames with a modern twist by engineering internal cable routing, integrated headsets and threaded bottom brackets. For riders who want a high-end, comfortable and fast bike built to last a lifetime, we believe a properly engineered titanium frame is the best choice and a lifetime warranty.



Additional parameters

Category: Bicycles
Warranty: lifetime
Rám: WHY Big Iron
Vidlice: ENVE Carbon Fat Fork
Náhlavní souprava: CaneCreek řady 40 IS42 / IS52
Kola: Dvojkolí Sun Ringle Mulefut
Bezdušové pneu: Součástí je bezdušová sada
Pneumatiky: Terrene Cake Eater Lite 27,5 x 4,5 ″ 120 tpi
Řidítka: SRAM Descendant Alloy 35x800mm
Představec: SRAM Descendant 35mmx40mm
Teleskopická sedlovka: Crank Brothers Highline 7 31,6 x 125 mm, 150 mm
Sedlo: Ergon SM10 Standard Black
Řazení: SRAM GX Eagle
Brzdy: SRAM G2 R
Kotouče: Avid Centerline 160 mm
Přehazovačka: SRAM GX Eagle
Řetěz: SRAM GX Eagle
Kazeta: SRAM GX Eagle 10-52
Kliky: Truvativ Crank Stylo 6K Alloy Dub FAT5 170 30t
Středové složení: SRAM Threaded DUB 100mm BSA Standard
Gripy: Ergon GE10
Vytvořil Shoptet | Design Shoptetak.cz