2021 Rocky Mountain Altitude Alloy (27.5) vs 2023 Mondraker Foxy R
The XL is the Mondraker Foxy R size closest to your XL 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 Mondraker Foxy R
Compared with the Rocky Mountain Altitude Alloy (27.5) in XL, the Mondraker Foxy R in XL places the top of the head tube 6 mm lower and 7 mm further forward, relative to the bottom bracket. Its wheelbase is 11 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- −11 mm
- Shorter: quicker to change direction
- Head angle
- +1.2°
- Steeper: sharper steering
- Chainstays
- −2 mm
- About the same
The two frames
Rocky Mountain Altitude Alloy (27.5), XLMondraker Foxy R, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Rocky Mountain Altitude Alloy (27.5) XL | Mondraker Foxy R XL | Difference |
|---|---|---|---|
| Reach | 508 | 515 | +7 mm |
| Stack | 649 | 643 | −6 mm |
| Head tube angle | 64.8 | 66 | +1.2° |
| Seat tube angle | 75.8 | 76 | +0.2° |
| Effective top tube | 672 | 676 | +4 mm |
| Chainstay length | 437 | 435 | −2 mm |
| Wheelbase | 1285 | 1274 | −11 mm |
| BB drop | 30 | not listed | |
| Standover | 815 | not listed | |
| Seat tube length | 480 | 510 mm | +30 mm |
| Head tube length | 125 | 130 mm | +5 mm |
| BB height | not listed | 355 |
Differences are the Mondraker Foxy R minus the Rocky Mountain Altitude Alloy (27.5). Full charts: 2021 Rocky Mountain Altitude Alloy (27.5), 2023 Mondraker Foxy R.
Where each sits in its class
Rocky Mountain Altitude Alloy (27.5)Mondraker Foxy R
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) | Mondraker Foxy RR |
|---|---|---|
| Fork | Fox 36 Performance | Öhlins RXF 36 M.2 29 |
| Rear shock | Fox DPX2 Performance | Öhlins TTX |
| Chain | Shimano Deore M6100 | SRAM SX Eagle |
| Crankset | Race Face Aeffect Cinch | SRAM SX Eagle |
| Tire | Maxxis Assegai, Maxxis Minion DHR II | Maxxis Minion DHF, Maxxis Aggressor |
| Hub | Rocky Mountain Sealed Boost, DT Swiss 370 | not listed |
| Rim | WTB ST i30 | not listed |
| Rotor | Shimano SM-RT66 | not listed |
| Dropper post | Race Face Aeffect R | Onoff Pija dropper internal |
| Frame | not listed | Mondraker Foxy 29 |
| Shifter | not listed | SRAM SX Eagle |
| Derailleur | not listed | SRAM NX Eagle |
| Cassette | not listed | SRAM XG-1230 |
| Bottom bracket | not listed | SRAM DUB |
| Brake | not listed | SRAM G2 |
| Handlebar | not listed | Onoff Sulfur 1.0 double butted 6061 alloy |
| Stem | not listed | Onoff Sulfur FG 30mm 0º |
| Grips | not listed | Onoff Twin |
| Headset | not listed | Onoff Saturn tapered for 1-1/8” to 1-1/2” head tube |
| Saddle | not listed | SDG Bel-Air 3.0 |
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