2021 Rocky Mountain Altitude Alloy (27.5) vs 2022 Specialized Enduro LTD
The S3 is the Specialized Enduro LTD size closest to your M Rocky Mountain Altitude Alloy (27.5). 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 Enduro LTD
Compared with the Rocky Mountain Altitude Alloy (27.5) in M, the Specialized Enduro LTD in S3 places the top of the head tube 13 mm higher and 11 mm further forward, relative to the bottom bracket. Its wheelbase is 46 mm longer, which can contribute to stability at speed.
- Frame stack
- +13 mm
- Higher front end
- Frame reach
- +11 mm
- Longer frame reach
- Wheelbase
- +46 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- +14 mm
- Longer: more planted
The two frames
Rocky Mountain Altitude Alloy (27.5), MSpecialized Enduro LTD, S3Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Rocky Mountain Altitude Alloy (27.5) M | Specialized Enduro LTD S3 | Difference |
|---|---|---|---|
| Reach | 453 | 464mm | +11 mm |
| Stack | 607 | 620mm | +13 mm |
| Head tube angle | 64.8 | 64.3mm | −0.5° |
| Seat tube angle | 75.8 | 76° | +0.2° |
| Effective top tube | 606 | not listed | |
| Chainstay length | 428 | 442mm | +14 mm |
| Wheelbase | 1200 | 1246mm | +46 mm |
| BB drop | 15 | not listed | |
| Standover | 802 | not listed | |
| Seat tube length | 420 | 420mm | ±0 mm |
| Head tube length | 110 | 100mm | −10 mm |
Differences are the Specialized Enduro LTD minus the Rocky Mountain Altitude Alloy (27.5). Full charts: 2021 Rocky Mountain Altitude Alloy (27.5), 2022 Specialized Enduro LTD.
Where each sits in its class
Rocky Mountain Altitude Alloy (27.5)Specialized Enduro LTD
Each bike is ranked against the other enduro 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 | Rocky Mountain Altitude Alloy (27.5)Alloy 50 (27.5) | Specialized Enduro LTDLTD |
|---|---|---|
| Fork | Fox 36 Performance | Öhlins RXF38 M.2 |
| Rear shock | Fox DPX2 Performance | Öhlins TTX 22 |
| Chain | Shimano Deore M6100 | SRAM GX Eagle |
| Crankset | Race Face Aeffect Cinch | SRAM GX Eagle |
| Tire | Maxxis Assegai, Maxxis Minion DHR II | Specialized Butcher |
| Hub | Rocky Mountain Sealed Boost, DT Swiss 370 | Roval DT Swiss 370 |
| Rim | WTB ST i30 | Roval Traverse 29 |
| Rotor | Shimano SM-RT66 | not listed |
| Dropper post | Race Face Aeffect R | not listed |
| Shifter | not listed | SRAM GX |
| Derailleur | not listed | SRAM GX Eagle |
| Cassette | not listed | SRAM GX Eagle |
| Bottom bracket | not listed | SRAM DUB |
| Brake | not listed | SRAM Code RSC |
| Stem | not listed | Specialized Deity |
| Grips | not listed | Specialized Diety |
| Seatpost | not listed | Specialized OneUp |
| Saddle | not listed | Specialized Bridge |
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