2024 Rocky Mountain Altitude Powerplay A50 Shimano vs 2024 Specialized Enduro Expert
The S4 is the Specialized Enduro Expert size closest to your L Rocky Mountain Altitude Powerplay A50 Shimano. 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 Expert
Compared with the Rocky Mountain Altitude Powerplay A50 Shimano in L, the Specialized Enduro Expert in S4 places the top of the head tube 3 mm lower and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 13 mm longer, which can contribute to stability at speed.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +13 mm
- Longer: steadier at speed
- Head angle
- +0.4°
- Steeper: sharper 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 Powerplay A50 Shimano numbers we have for size L are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Rocky Mountain Altitude Powerplay A50 Shimano L | Specialized Enduro Expert S4 | Difference |
|---|---|---|---|
| Reach | 475 | 487mm | +12 mm |
| Stack | 632 | 629mm | −3 mm |
| Head tube angle | 63.5 | 63.9° | +0.4° |
| Seat tube angle | 75.5 | 76° | +0.5° |
| Wheelbase | 1261 | 1274mm | +13 mm |
| Chainstay length | not listed | 442mm | |
| Seat tube length | not listed | 440mm | |
| Head tube length | not listed | 110mm |
Differences are the Specialized Enduro Expert minus the Rocky Mountain Altitude Powerplay A50 Shimano. Full charts: 2024 Rocky Mountain Altitude Powerplay A50 Shimano, 2024 Specialized Enduro Expert.
Where each sits in its class
Rocky Mountain Altitude Powerplay A50 ShimanoSpecialized Enduro Expert
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 Powerplay A50 ShimanoPowerplay A50 Shimano | Specialized Enduro ExpertExpert |
|---|---|---|
| Frame | Rocky Mountain FORM | Specialized Enduro |
| Fork | RockShox ZEB Select | RockShox Zeb Select+ |
| Rear shock | Fox Float X Performance | RockShox Super Deluxe |
| Shifter | Shimano SLX XT | SRAM GX Eagle AXS Controller |
| Derailleur | Shimano XT Di2 Wireless | SRAM GX Eagle AXS |
| Cassette | Shimano Deore XT | SRAM GX Eagle |
| Chain | Shimano Deore M6100 | SRAM GX Eagle |
| Crankset | Race Face Ride | SRAM GX Eagle |
| Chainring | Race Face RIDE | SRAM Eagle DUB GX |
| Bottom bracket | Shimano SM-BBMT500 | SRAM DUB |
| Motor | Rocky Mountain Dyname 4.0 | not listed |
| Battery | Rocky Mountain Integrated | not listed |
| Wheelset | WTB ST i30 TCS 2.0 | Roval Traverse 29 |
| Tire | Maxxis Assegai, Maxxis Minion DHR II DD | Specialized Butcher |
| Brake | Shimano MT6120 | SRAM Code RS |
| Handlebar | Rocky Mountain AM | Specialized Trail 7050 alloy |
| Stem | Rocky Mountain 35 AM | Specialized Alloy Trail |
| Grips | ODI Elite Pro | Specialized Deity Grips |
| Headset | FSA Orbit | not listed |
| Dropper post | X-Fusion Manic Alloy | not listed |
| Saddle | WTB Volt Race | Specialized Bridge |
| Hub | not listed | Roval DT Swiss 370 |
| Rim | not listed | Roval Traverse 29 |
| Rotor | not listed | SRAM Code RS |
| Seatpost | not listed | Specialized OneUp |
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