Hightower X0 AXS

The fourth-generation Santa Cruz Hightower shifts the platform away from its versatile trail roots and closer to a dedicated all-mountain machine. Rolling on 29-inch wheels, the V4 frame bumps rear travel to 150 millimeters and pairs it with a 160-millimeter fork. Santa Cruz also revised the VPP suspension layout, dropping the shock lower into the front triangle to reduce anti-squat and minimize pedal kickback.

This evolution targets riders who prioritize descending composure over snappy acceleration. While it remains capable of long days in the saddle, the Hightower now leans heavily toward steep, rough terrain. It suits aggressive pilots who want the high-speed stability of an enduro sled but prefer a slightly more manageable footprint for everyday trail riding.

$8,299Carbon CCGen V4

Build

Size

Stack	632mm
Reach	460mm
Top tube	595mm
Headtube length	120mm
Standover height	723mm
Seat tube length	405mm

Fit and geometry

The Hightower’s geometry reflects its aggressive intentions, placing the rider in a centered, upright position for climbing while stretching out the wheelbase for descending stability. A steep effective seat tube angle, hovering around 78 degrees depending on the size and flip-chip setting, keeps rider weight forward on steep pitches.

At the front, the head tube angle slackens to roughly 64 degrees, paired with a notably tall stack height. While this high front end offers security on steep descents, several reviewers found it could make the steering feel vague on flat corners or steep climbs. To compensate, testers frequently recommended lowering the stem or running lower-rise bars to keep adequate weight on the front tire.

Santa Cruz utilizes size-scaled chainstays across the size run, ensuring the bike's balance remains consistent for riders of different heights. The frame also includes a flip-chip at the lower shock mount, allowing riders to slightly tweak the bottom bracket height and angles to suit their local terrain.

Full specs

Frameset

Frame

Santa Cruz Carbon CC frame, VPP suspension, 150mm travel, 29in wheels

Fork

Fox 36 Float Factory, GRIP X2, 160mm, 44mm offset

Rear shock

FOX Float X Factory, 230x57.5mm

Weight

32.31 lbs / 14.65 kg

Groupset

Shift levers

SRAM AXS Pod Controller (Rocker Paddle)

Rear derailleur

SRAM X0 Eagle AXS T-Type, 12-speed

Cassette

SRAM X0 Eagle T-Type, 10-52T

Chain

SRAM X0 Eagle T-Type Flattop, 12-speed

Crankset

SRAM X0 Eagle DUB T-Type Crankset, 32T

Bottom bracket

SRAM DUB 73mm MTB Wide BB (73mm threaded shell)

Front brake

SRAM Maven Silver Stealth

Rear brake

SRAM Maven Silver Stealth

Front rotor

SRAM HS2 180mm

Rear rotor

SRAM HS2 180mm

Wheelset

Front wheel

Reserve 30|SL AL 6069 -or- Race Face ARC 30; Industry Nine 1/1, 15x110mm, 6-bolt, 28h

Rear wheel

Reserve 30|SL AL 6069 -or- Race Face ARC 30; Industry Nine 1/1, 12x148mm, XD driver, 6-bolt, 28h

Front tire

Maxxis Minion DHF 29x2.5 WT, 3C MaxxGrip, EXO

Rear tire

Maxxis Minion DHR II 29x2.4, 3C MaxxTerra, EXO+

Cockpit

Stem

OneUp Stem, 42mm -or- Burgtec Enduro Stem, 42mm

Handlebars

Santa Cruz 35 Carbon Bar, 800mm

Saddle

WTB Silverado Medium Fusion, CroMo SL

Seatpost

OneUp Dropper Post, 31.6 (S: 120mm; M: 150mm; L: 180mm; XL: 210mm; XXL: 210mm)

Grips

Santa Cruz Bicycles House Grips

Builds

The Hightower lineup spans nine builds, split between Santa Cruz’s C and CC carbon frames. The premium CC frames save weight but eliminate internal cable routing for the drivetrain, restricting those builds to wireless electronic shifting. Riders who prefer mechanical drivetrains must opt for the slightly heavier C frame, which retains traditional cable ports. All frames feature a threaded bottom bracket and the brand's Glovebox internal downtube storage.

Suspension duties are handled by Fox on the majority of the line, with RockShox appearing only on the entry-level models. Most builds feature SRAM Maven brakes, though several reviewers noted that the stock 180-millimeter rotors felt undersized for a bike with this much descending capability, suggesting aggressive riders might need an immediate upgrade to larger rotors.

Similarly, the stock Maxxis tires pair an EXO casing up front with an EXO+ in the rear. While this keeps the complete bike weight reasonable, testers frequently recommended swapping to heavier casings to match the frame's enduro-adjacent limits. Value is bolstered by a lifetime warranty on the frame, pivot bearings, and the Reserve carbon wheels included on higher-end builds.

$4,999

$5,149

$5,899

$6,099

GX AXS

$7,249

Carbon C

X0 AXS

$8,299

Carbon CCSelected

X0 AXS RSV

$9,349

Carbon CC

XTR RSV

$11,399

Carbon CC

XX AXS RSV

$11,399

Carbon CC

Reviews

Reviewers largely agree that the Hightower has traded some of its former agility for outright descending speed. At velocity, the bike is highly composed, with testers noting it acts as a "full-throttle bruiser for the rough stuff" (Bike-test). The revised suspension kinematics successfully isolate the rider from trail feedback, making the new frame "noticeably smoother than V3 in terms of foot feel" (Bike Perfect). Multiple reviewers praised its ability to carry momentum through chunky rock gardens and root beds.

That stability comes with a clear tradeoff in tight terrain. At slower speeds, the lengthened wheelbase requires deliberate rider input, forcing pilots to "manhandle the bike" (Flow Mountain Bike) through tight switchbacks. A few testers also found the suspension tune to be quite firm, requiring an aggressive riding style to fully utilize the travel.

On climbs, the Hightower prioritizes traction over efficiency. While it carries a slight weight penalty compared to its predecessor, the active rear end keeps the tire glued to the trail on technical ascents. It lacks the immediate acceleration of lighter trail bikes, but it reliably grinds up steep, loose grades without excessive pedal bob.