2018 Specialized Enduro 29/6Fattie vs 2020 Specialized Stumpjumper ST Alloy 27.5
The M is the Specialized Stumpjumper ST Alloy 27.5 size closest to your M Specialized Enduro 29/6Fattie. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Stumpjumper ST Alloy 27.5
Compared with the Specialized Enduro 29/6Fattie in M, the Specialized Stumpjumper ST Alloy 27.5 in M places the top of the head tube 10 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 11 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −10 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −11 mm
- Shorter: quicker to change direction
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −1 mm
- About the same
The two frames
Specialized Enduro 29/6Fattie, MSpecialized Stumpjumper ST Alloy 27.5, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Enduro 29/6Fattie M | Specialized Stumpjumper ST Alloy 27.5 M | Difference |
|---|---|---|---|
| Reach | 440mm | 435mm | −5 mm |
| Stack | 606mm | 596mm | −10 mm |
| Head tube angle | 66° | 65.5° | −0.5° |
| Seat tube angle | 76.7° | 75° | −1.7° |
| Effective top tube | 584mm | not listed | |
| Chainstay length | 433mm | 432mm | −1 mm |
| Wheelbase | 1190mm | 1179mm | −11 mm |
| BB drop | 19mm | 21mm | +2 mm |
| BB height | 354mm | 336mm | −18 mm |
| Standover | 769mm | 757mm | −12 mm |
| Seat tube length | 430mm | 410mm | −20 mm |
| Fork length | 569mm | 542mm | −27 mm |
| Head tube length | 95mm | 110mm | +15 mm |
Differences are the Specialized Stumpjumper ST Alloy 27.5 minus the Specialized Enduro 29/6Fattie. Full charts: 2018 Specialized Enduro 29/6Fattie, 2020 Specialized Stumpjumper ST Alloy 27.5.
Where each sits in its class
Specialized Enduro 29/6FattieSpecialized Stumpjumper ST Alloy 27.5
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Enduro 29/6FattieS-Works 29/6Fattie | Specialized Stumpjumper ST Alloy 27.5 |
|---|---|---|
| Frame | Specialized FACT IS-X | not listed |
| Fork | Öhlins RXF 36 | not listed |
| Rear shock | Öhlins STX | not listed |
| Shifter | SRAM XX1 Eagle | not listed |
| Derailleur | SRAM XX1 Eagle | not listed |
| Cassette | SRAM X01 Eagle | not listed |
| Chain | SRAM XX1 Eagle | not listed |
| Crankset | SRAM XX1 Eagle | not listed |
| Bottom bracket | SRAM XR 73 | not listed |
| Tire | Specialized Butcher | not listed |
| Hub | Roval Traverse SL | not listed |
| Rim | Roval Traverse SL 29 | not listed |
| Brake | SRAM Code RSC | not listed |
| Stem | Syntace MegaForce 2 | not listed |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Specialized Command Post IRcc WU | not listed |
| Saddle | Specialized Henge Expert | not listed |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
