2021 Specialized Enduro vs 2021 Rocky Mountain Altitude Alloy
The 27.5 M is the Rocky Mountain Altitude Alloy size closest to your S3 Specialized Enduro. 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 Rocky Mountain Altitude Alloy
Compared with the Specialized Enduro in S3, the Rocky Mountain Altitude Alloy in 27.5 M places the top of the head tube 13 mm lower and 11 mm further back, relative to the bottom bracket. Its wheelbase is 46 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −13 mm
- Lower front end
- Frame reach
- −11 mm
- Shorter frame reach
- Wheelbase
- −46 mm
- Shorter: quicker to change direction
- Head angle
- +0.9°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Enduro is drawn. The Rocky Mountain Altitude Alloy numbers we have for size 27.5 M are missing the chainstay length.
Geometry side by side
| Measurement | Specialized Enduro S3 | Rocky Mountain Altitude Alloy 27.5 M | Difference |
|---|---|---|---|
| Reach | 464mm | 453 | −11 mm |
| Stack | 620mm | 607 | −13 mm |
| Head tube angle | 63.9° | 64.8 | +0.9° |
| Seat tube angle | 76° | 75.8 | −0.2° |
| Chainstay length | 442mm | not listed | |
| Wheelbase | 1246mm | 1200 | −46 mm |
| Seat tube length | 420mm | not listed | |
| Head tube length | 100mm | not listed | |
| Effective top tube | not listed | not listed | |
| BB drop | not listed | not listed | |
| Standover | not listed | not listed |
Differences are the Rocky Mountain Altitude Alloy minus the Specialized Enduro. Full charts: 2021 Specialized Enduro, 2021 Rocky Mountain Altitude Alloy.
Where each sits in its class
Specialized EnduroRocky Mountain Altitude Alloy
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 | Specialized Enduro | Rocky Mountain Altitude AlloyAlloy 30 |
|---|---|---|
| Frame | not listed | Rocky Mountain FORM™ Alloy |
| Fork | not listed | Marzocchi Z1 |
| Rear shock | not listed | Fox Float Performance |
| Shifter | not listed | Shimano Deore |
| Derailleur | not listed | Shimano Deore |
| Cassette | not listed | Shimano Deore XT |
| Chain | not listed | Shimano Deore M6100 |
| Crankset | not listed | Shimano Deore XT |
| Bottom bracket | not listed | Shimano SM-BBMT500 |
| Wheelset | not listed | Shimano MT410 |
| Tire | not listed | Maxxis Minion DHF, Maxxis Minion DHR II DD |
| Brake | not listed | Shimano MT4120 |
| Rotor | not listed | Shimano SM-RT64 |
| Handlebar | not listed | Rocky Mountain AM |
| Stem | not listed | Rocky Mountain AM |
| Grips | not listed | Ergon GE10 EVO |
| Headset | not listed | FSA Orbit 57E |
| Dropper post | not listed | Rocky Mountain Toonie Drop |
| Saddle | not listed | WTB Volt |
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