Big Iron
The Big Iron is built around the new standard 27.5" fat bike wheels with clearance for up to 27.5×4.5" or 26×5" tires. This modern titanium steed will be your trusty companion on any snow or soft-surface endeavor.
The crew at Why goes way back to the early days of fat biking in Alaska, and the Big Iron is the culmination of years of fat biking experience combined with modern design features, and an engineering oversight to optimize Why's titanium tubing to the rigorous riding the Big Iron is made for.
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REAR TRAVEL
00mm
FRONT TRAVEL
Up To 120mm
WHEEL SIZE
26", 27.5"
FRAME MATERIAL
Titanium
Build SpecsGEOMETRY
Build Specs
| NX Eagle | GX Eagle | X01 Eagle | XX1 Eagle AXS |
|---|---|---|---|
| Fork | Manitou Mastadon Comp | ENVE Carbon Fork | |
| Headset | Cane Creek | Cane Creek | |
| Bottom Bracket | Sram Dub 100mm | Sram Dub 100mm | |
| Crankset | Sram NX Eagle Fat 5 | Sram GX Eagle Fat 5 | |
| Stem | Raceface Aeffect | Raceface Aeffect | |
| Handlebar | Diety 35mm | Raceface Aeffect 35mm | |
| Seatpost | Raceface Ride | Raceface Ride | |
| Saddle | WTB Volt | WTB Volt | |
| Grips | Raceface | Raceface | |
| Shifter | Sram NX Eagle | Sram GX Eagle | |
| Cable Housing | Jagwire Shift | Jagwire Shift | |
| Derailleur | Sram NX Eagle | Sram GX Eagle | |
| Chain | Sram NX Eagle | Sram GX Eagle | |
| Cassette | Sram NX Eagle | Sram GX Eagle | |
| Brakes | Sram Level T | Sram G2R | |
| Rotors | Jagwire 160mmF/180mmR | SRAM Centerline 160mmF/180mmR |
|
| Wheelset | Corvus Big SU 27.5/HG Driver | Brake lever and Rotor bolts | |
| Tires | Terrene Cake Eater 27.5×4.5 | Corvus Big SU 27.5/XD Driver | |
| Bottom Bracket | SRAM DUB BSA | Terrene Cake Eater 27.5×4.5 | |
| Grips | Lizard Skins Charger Evo Grip Black | Lizard Skins Charger Evo Grip Black | |
| Seat Collar | Revel 34.9mm Dia | Revel 34.9mm Dia | |
| **Specifications subject to change without notice** | **Specifications subject to change without notice** | **Specifications subject to change without notice** | **Specifications subject to change without notice** |
| S | M | L | XL | |
|---|---|---|---|---|
| RIDER HEIGHT (In.) | 5'1" - 5'7" | 5'6" - 5'10" | 5'9" - 6'2" | 6'1" - 6'7" |
| RIDER HEIGHT (cm) | 155 - 170cm | 167.5 - 178cm | 175 - 188cm | 185.5 - 200.5cm |
| EFFECTIVE TOP TUBE LENGTH | 594mm | 616mm | 639mm | 667mm |
| SEAT TUBE LENGTH | 373mm | 403mm | 439mm | 457mm |
| SEAT TUBE ANGLE (EFFECTIVE/ACTUAL) | 75.3° | 75.3° | 75.3° | 75.3° |
| CHAIN STAY LENGTH | 436mm | 436mm | 436mm | 436mm |
| BOTTOM BRACKET DROP | 38mm | 38mm | 38mm | 38mm |
| BOTTOM BRACKET HEIGHT | 338mm | 338mm | 338mm | 338mm |
| HEAD TUBE ANGLE | 67.5° | 67.5° | 67.5° | 67.5° |
| WHEEL BASE | 1146mm | 1170mm | 1194mm | 1223mm |
| HEAD TUBE LENGTH | 95mm | 105mm | 116mm | 127mm |
| AXLE TO CROWN | 531mm | 531mm | 531mm | 531mm |
| FORK OFFSET | 44mm | 44mm | 44mm | 44mm |
| TRAIL | 108mm | 108mm | 108mm | 108mm |
| STACK | 600mm | 609mm | 619mm | 629mm |
| REACH | 430mm | 453mm | 473mm | 498mm |
| STANDOVER | 699mm | 699mm | 699mm | 700mm |
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