Quiver

2021 Rocky Mountain Altitude Carbon vs 2021 Giant Reign Advanced Pro

The Giant Reign Advanced Pro size closest to your 27.5 XL is the XL. Compare the XL instead

What changes on the Giant Reign Advanced Pro

Compared with the Rocky Mountain Altitude Carbon in 27.5 XL, the Giant Reign Advanced Pro in M places the top of the head tube 27 mm lower and 57 mm further back, relative to the bottom bracket. Its wheelbase is 65 mm shorter, which can contribute to quicker direction changes.

Frame stack
−27 mm
Lower front end
Frame reach
−57 mm
Shorter frame reach
Wheelbase
−65 mm
Shorter: quicker to change direction
Head angle
−0.2°
About the same head angle
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 Carbon numbers we have for size 27.5 XL are missing the chainstay length. The numbers below still compare.

Geometry side by side

MeasurementRocky Mountain Altitude Carbon 27.5 XLGiant Reign Advanced Pro MDifference
Reach508451−57 mm
Stack649622−27 mm
Head tube angle64.864.6−0.2°
Seat tube angle75.876.4+0.6°
Wheelbase12851220−65 mm
BB dropnot listed27
Standovernot listed759
Effective top tubenot listed601
Chainstay lengthnot listed439
Seat tube lengthnot listed431
Head tube lengthnot listed100

Differences are the Giant Reign Advanced Pro minus the Rocky Mountain Altitude Carbon. Full charts: 2021 Rocky Mountain Altitude Carbon, 2021 Giant Reign Advanced Pro.

Where each sits in its class

Rocky Mountain Altitude CarbonGiant Reign Advanced Pro

AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted

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.

PartRocky Mountain Altitude CarbonCarbon 50Giant Reign Advanced ProAdvanced Pro 0
FrameRocky Mountain SMOOTHWALL™ CarbonGiant Reign
ForkFox 36 PerformanceFox 38 Factory
Rear shockFox Float PerformanceFox DHX2 Factory
ShifterShimano SLX XTShimano XTR M9100
DerailleurShimano XTShimano XTR M9100
CassetteShimano SLX 10-51TShimano XTR M9100
ChainShimano SLX M7100Shimano XTR
CranksetRace Face Aeffect CinchShimano XTR M9100
Bottom bracketShimano SM-BBMT500not listed
WheelsetRace Face AR30 MulletGiant TRX 0
TireMaxxis Assegai, Maxxis Minion DHR II DDMaxxis Assegai, Maxxis Minion DHR II DD
BrakeShimano XT Trail 4 PistonShimano XTR M9120
RotorShimano RT-66Shimano XTR
HandlebarRocky Mountain AMGiant Contact SLR
StemRocky Mountain AMGiant Contact SL
GripsErgon GE10 EVOnot listed
HeadsetFSA Orbit 57Enot listed
Dropper postRace Face Aeffect Rnot listed
SaddleWTB Volt RaceGiant Romero SL
Seatpostnot listedFox Transfer Factory

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