2021 Rocky Mountain Altitude Alloy (27.5) vs 2021 Santa Cruz Megatower Coil
The L is the Santa Cruz Megatower Coil 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 Santa Cruz Megatower Coil
Compared with the Rocky Mountain Altitude Alloy (27.5) in M, the Santa Cruz Megatower Coil in L places the top of the head tube 18 mm higher and 14 mm further forward, relative to the bottom bracket.
- Frame stack
- +18 mm
- Higher front end
- Frame reach
- +14 mm
- Longer frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- −0.1°
- About the same head angle
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Rocky Mountain Altitude Alloy (27.5) is drawn. The Santa Cruz Megatower Coil numbers we have for size L are missing the chainstay length and wheelbase.
Geometry side by side
| Measurement | Rocky Mountain Altitude Alloy (27.5) M | Santa Cruz Megatower Coil L | Difference |
|---|---|---|---|
| Reach | 453 | 467 | +14 mm |
| Stack | 607 | 625 | +18 mm |
| Head tube angle | 64.8 | 64.7 | −0.1° |
| Seat tube angle | 75.8 | 76.3 | +0.5° |
| Effective top tube | 606 | not listed | |
| Chainstay length | 428 | not listed | |
| Wheelbase | 1200 | not listed | |
| BB drop | 15 | not listed | |
| Standover | 802 | not listed | |
| Seat tube length | 420 | not listed | |
| Head tube length | 110 | not listed |
Differences are the Santa Cruz Megatower Coil minus the Rocky Mountain Altitude Alloy (27.5). Full charts: 2021 Rocky Mountain Altitude Alloy (27.5), 2021 Santa Cruz Megatower Coil.
Where each sits in its class
Rocky Mountain Altitude Alloy (27.5)Santa Cruz Megatower Coil
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) | Santa Cruz Megatower CoilX01 Coil |
|---|---|---|
| Fork | Fox 36 Performance | Fox 38 Factory |
| Rear shock | Fox DPX2 Performance | Fox FLOAT DHX2 Factory |
| Chain | Shimano Deore M6100 | SRAM X01 Eagle |
| Crankset | Race Face Aeffect Cinch | SRAM X01 Eagle |
| Tire | Maxxis Assegai, Maxxis Minion DHR II | Maxxis Assegai, Maxxis Minion DHR II DD |
| Hub | Rocky Mountain Sealed Boost, DT Swiss 370 | not listed |
| Rim | WTB ST i30 | not listed |
| Rotor | Shimano SM-RT66 | SRAM HS2 |
| Dropper post | Race Face Aeffect R | RockShox Reverb Stealth |
| Frame | not listed | Santa Cruz Megatower |
| Shifter | not listed | SRAM X01 Eagle |
| Derailleur | not listed | SRAM X01 Eagle AXS |
| Cassette | not listed | SRAM Eagle |
| Wheelset | not listed | Santa Cruz Reserve 30 |
| Brake | not listed | SRAM Code Ultimate Stealth |
| Handlebar | not listed | Santa Cruz AM Carbon |
| Stem | not listed | Burgtec Enduro MK3 |
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