2021 Rocky Mountain Altitude Alloy (27.5) vs 2023 Evil Wreckoning SRAM Build
The S is the Evil Wreckoning SRAM Build 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 Evil Wreckoning SRAM Build
Compared with the Rocky Mountain Altitude Alloy (27.5) in M, the Evil Wreckoning SRAM Build in S places the top of the head tube 19 mm higher and 15 mm further back, relative to the bottom bracket. Its wheelbase is 5 mm longer, which can contribute to stability at speed.
- Frame stack
- +19 mm
- Higher front end
- Frame reach
- −15 mm
- Shorter frame reach
- Wheelbase
- +5 mm
- Longer: steadier at speed
- Head angle
- −0.2°
- About the same head angle
- Chainstays
- +2 mm
- About the same
The two frames
Rocky Mountain Altitude Alloy (27.5), MEvil Wreckoning SRAM Build, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Rocky Mountain Altitude Alloy (27.5) M | Evil Wreckoning SRAM Build S | Difference |
|---|---|---|---|
| Reach | 453 | 438 | −15 mm |
| Stack | 607 | 626 | +19 mm |
| Head tube angle | 64.8 | 64.6 | −0.2° |
| Seat tube angle | 75.8 | 76.3 | +0.5° |
| Effective top tube | 606 | 590 | −16 mm |
| Chainstay length | 428 | 430 | +2 mm |
| Wheelbase | 1200 | 1205 | +5 mm |
| BB drop | 15 | 18 | +3 mm |
| Standover | 802 | 718 | −84 mm |
| Seat tube length | 420 | 390 | −30 mm |
| Head tube length | 110 | 104 | −6 mm |
| BB height | not listed | 355 |
Differences are the Evil Wreckoning SRAM Build minus the Rocky Mountain Altitude Alloy (27.5). Full charts: 2021 Rocky Mountain Altitude Alloy (27.5), 2023 Evil Wreckoning SRAM Build.
Where each sits in its class
Rocky Mountain Altitude Alloy (27.5)Evil Wreckoning SRAM Build
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) | Evil Wreckoning SRAM BuildSRAM GX Build |
|---|---|---|
| Fork | Fox 36 Performance | RockShox ZEB |
| Rear shock | Fox DPX2 Performance | RockShox Super Deluxe Coil Ultimate |
| Chain | Shimano Deore M6100 | not listed |
| Crankset | Race Face Aeffect Cinch | SRAM GX Eagle AXS |
| Tire | Maxxis Assegai, Maxxis Minion DHR II | not listed |
| Hub | Rocky Mountain Sealed Boost, DT Swiss 370 | not listed |
| Rim | WTB ST i30 | not listed |
| Rotor | Shimano SM-RT66 | SRAM CenterLine |
| Dropper post | Race Face Aeffect R | OneUp Components V2 |
| Frame | not listed | Evil Wreckoning |
| Shifter | not listed | SRAM GX Eagle AXS Rocker |
| Derailleur | not listed | SRAM GX Eagle |
| Cassette | not listed | SRAM XG-1275-B1 |
| Wheelset | not listed | e*thirteen LG1 EN |
| Brake | not listed | SRAM G2 RS |
| Handlebar | not listed | Evil Boomstick Alloy |
| Stem | not listed | Evil 12 Gauge |
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