2021 Rocky Mountain Altitude Alloy vs 2022 Specialized Enduro LTD
The S4 is the Specialized Enduro LTD size closest to your 27.5 L Rocky Mountain Altitude Alloy. 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 in 27.5 L, the Specialized Enduro LTD in S4 places the top of the head tube 6 mm lower and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 25 mm longer, which can contribute to stability at speed.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- +25 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Rocky Mountain Altitude Alloy numbers we have for size 27.5 L are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Rocky Mountain Altitude Alloy 27.5 L | Specialized Enduro LTD S4 | Difference |
|---|---|---|---|
| Reach | 478 | 487mm | +9 mm |
| Stack | 635 | 629mm | −6 mm |
| Head tube angle | 64.8 | 64.3mm | −0.5° |
| Seat tube angle | 75.8 | 76° | +0.2° |
| Effective top tube | not listed | not listed | |
| Chainstay length | not listed | 442mm | |
| Wheelbase | 1249 | 1274mm | +25 mm |
| BB drop | not listed | not listed | |
| Standover | not listed | not listed | |
| Seat tube length | not listed | 440mm | |
| Head tube length | not listed | 110mm |
Differences are the Specialized Enduro LTD minus the Rocky Mountain Altitude Alloy. Full charts: 2021 Rocky Mountain Altitude Alloy, 2022 Specialized Enduro LTD.
Where each sits in its class
Rocky Mountain Altitude AlloySpecialized 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 AlloyAlloy 30 | Specialized Enduro LTDLTD |
|---|---|---|
| Frame | Rocky Mountain FORM™ Alloy | not listed |
| Fork | Marzocchi Z1 | Öhlins RXF38 M.2 |
| Rear shock | Fox Float Performance | Öhlins TTX 22 |
| Shifter | Shimano Deore | SRAM GX |
| Derailleur | Shimano Deore | SRAM GX Eagle |
| Cassette | Shimano Deore XT | SRAM GX Eagle |
| Chain | Shimano Deore M6100 | SRAM GX Eagle |
| Crankset | Shimano Deore XT | SRAM GX Eagle |
| Bottom bracket | Shimano SM-BBMT500 | SRAM DUB |
| Wheelset | Shimano MT410 | not listed |
| Tire | Maxxis Minion DHF, Maxxis Minion DHR II DD | Specialized Butcher |
| Brake | Shimano MT4120 | SRAM Code RSC |
| Rotor | Shimano SM-RT64 | not listed |
| Handlebar | Rocky Mountain AM | not listed |
| Stem | Rocky Mountain AM | Specialized Deity |
| Grips | Ergon GE10 EVO | Specialized Diety |
| Headset | FSA Orbit 57E | not listed |
| Dropper post | Rocky Mountain Toonie Drop | not listed |
| Saddle | WTB Volt | Specialized Bridge |
| Hub | not listed | Roval DT Swiss 370 |
| Rim | not listed | Roval Traverse 29 |
| Seatpost | not listed | Specialized OneUp |
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