Bronson 90

The fourth-generation Santa Cruz Bronson marks a structural shift for the model, moving from a dedicated 27.5-inch platform to a mixed-wheel configuration. Pairing a 29-inch front wheel with a 27.5-inch rear (except on the extra-small size, which remains dual 27.5), the bike retains its 150mm of rear Virtual Pivot Point travel and 160mm fork. This redesign positions the Bronson squarely between the brand's dedicated trail and enduro offerings, aiming to balance high-speed stability with cornering agility.

Available exclusively in carbon fiber, the frame features a low-mounted shock driven by the lower link, a threaded bottom bracket, and universal derailleur hanger compatibility. While the fundamental geometry and suspension layout have remained consistent since the generation's introduction, later model years integrate Santa Cruz's Glovebox down-tube storage system.

$6,099Carbon CGen V4

Build

Size

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

Fit and geometry

The Bronson’s geometry balances modern length with a distinctly upright rider posture. Reach measurements are moderate for the category, sitting at 472mm on a size large in the low setting. A flip-chip at the lower shock mount allows for minor adjustments, altering the head tube angle by a fraction of a degree and shifting the bottom bracket height slightly, though most riders leave it in the lower, slacker position.

A defining characteristic of the fit is the exceptionally high front end. The combination of a long fork, a 29-inch front wheel, and riser handlebars creates a tall stack height that pushes the rider's weight rearward. While this provides security on steep descents, it requires a conscious effort to weight the front tire in flat corners to prevent understeer. To compensate, many riders opt to lower their stem or swap to a flatter handlebar.

Santa Cruz utilizes size-specific chainstays across the size run, growing the rear center proportionally to maintain a consistent weight distribution for taller and shorter riders alike. The steep seat tube angle keeps the rider centered over the bottom bracket, aiding the bike's strong climbing posture.

Full specs

Frameset

Frame

Carbon C MX 150mm Travel VPP™ (Carbon C), 150mm rear travel

Fork

FOX 36 Float Performance, GRIP, 160mm

Rear shock

FOX Float X Performance, 230x57.5

Weight

34.14 lb / 15.48 kg

Groupset

Shift levers

SRAM 90 Eagle T-Type, 12-speed (right)

Rear derailleur

SRAM 90 Eagle T-Type, 12-speed

Cassette

SRAM XS-1275 Eagle T-Type, 10-52T

Chain

SRAM GX Eagle T-Type Flattop, 12-speed

Crankset

SRAM 90 Eagle DUB T-Type crankset, 32T; 170mm (all sizes)

Bottom bracket

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

Front brake

SRAM Maven Base

Rear brake

SRAM Maven Base

Front rotor

SRAM HS2 200mm

Rear rotor

SRAM HS2 180mm

Wheelset

Front wheel

Reserve 30|TR AL; DT Swiss 370, 15x110, 6-bolt, 28h

Rear wheel

Reserve 30|TR AL; DT Swiss 370, 12x148, XD, 6-bolt, 36t, 28h

Front tire

Maxxis Assegai 29x2.5, 3C MaxxGrip, EXO+

Rear tire

Maxxis Minion DHR II 27.5x2.4, 3C MaxxTerra, EXO+

Cockpit

Stem

OneUp Enduro Stem, 42mm (all sizes)

Handlebars

OneUp Aluminum Bar; S: 35x760mm, 20mm rise; M/L/XL/XXL: 35x800mm, 35mm rise

Saddle

SDG Bel-Air V3 Lux-Alloy

Seatpost

OneUp Dropper Post, 31.6; S: 150mm, M: 180mm, L/XL: 210mm, XXL: 240mm

Grips

Santa Cruz Bicycles House Grips

Builds

The Bronson lineup is split between Santa Cruz’s standard C carbon frames and the lighter, premium CC carbon frames. Because there is no aluminum option for this generation, the entry price is relatively high. The base R build starts the range with a RockShox Lyrik Base fork, a Fox Float Rhythm shock, and a mechanical SRAM NX Eagle drivetrain.

Moving up the ladder introduces significant suspension and drivetrain upgrades. Mid-tier S and 90 builds transition to Fox 36 Performance forks and SRAM GX Eagle or T-Type transmissions. The upper-tier CC frames are reserved for the X0 AXS and X0 AXS RSV models, which feature Fox Factory suspension with Grip X2 dampers, wireless SRAM X0 Eagle T-Type drivetrains, and SRAM Maven Silver Stealth brakes.

Wheel specifications shift from RaceFace or Reserve aluminum rims on the lower and middle builds to Reserve carbon rims on the flagship models. Across the entire range, Santa Cruz specifies Maxxis EXO+ casing tires. Given the bike's aggressive intentions, riders frequently note that these lighter-duty casings may need to be swapped for thicker alternatives to prevent flats and protect the rims on rocky trails.

$4,999

Carbon C

$5,149

Carbon C

$5,899

Carbon C

$6,099

Carbon CSelected

GX AXS

$7,249

Carbon C

X0 AXS

$8,299

Carbon CC

X0 AXS RSV

$9,349

Carbon CC

Reviews

Reviewers consistently characterize the Bronson as a highly capable all-rounder that rewards an active, playful riding style. The mixed-wheel setup defines the experience on the trail, blending the rollover advantages of a larger front wheel with a rear end that is eager to change direction. Testers found the bike excels in tight corners and jump lines, describing the ride as a place where "party meets performance" (Theloamwolf).

Pedaling efficiency is a standout trait. The revised suspension kinematics provide a firm platform that resists bobbing, allowing the bike to accelerate quickly on steep, seated climbs without requiring riders to reach for the shock's lockout lever. However, the suspension tune and smaller rear wheel do present a distinct tradeoff on rougher descents. Multiple reviewers noted that the rear end can occasionally "thud over bumps" (BikeRadar) rather than absorbing them smoothly. In particularly chunky, square-edged terrain, the 27.5-inch rear tire sometimes "cannot cash the cheques that the 29in front wheel writes" (Singletrackworld), requiring the rider to actively pump and unweight the bike rather than simply plowing through rock gardens. Despite this firm feel, the chassis offers excellent mid-stroke support and bottom-out resistance for larger impacts.