Santa Cruz Blur 4 CC X0 AXS Reserve Complete Mountain Bike 2025

Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.

With speed and pedaling efficiency in mind, cross country (XC) bikes are the lightest mountain bikes with the least suspension travel (typically 0 - 120mm).

Engineered to tackle the most challenging terrain with enhanced comfort and control. Unlike hardtail bikes, full suspension bikes feature both front and rear suspension systems that allow the wheels to move independently from the frame.

Carbon is a composite frame material. Unlike metals, carbon is composed of fibrous strands woven into a grid and bonded with epoxy. Carbon is favored by many for its lightness and stiffness but its complexity in fabrication makes it the most expensive option.

Cross-country purists… we see you. You’re why SID SL Ultimate is the lightest XC fork on the trail. But weight is meaningless without world-class performance and durability.

Fork Adjustments - Charger Race Day 2 Damper with three-position (3P) compression damping—rigid Lock, plush Open, and efficient Pedal positions, on demand for every inch of the race course.

SIDLuxe has one thing on its mind: speed. Designed for racers, but anyone can ride it! It's lightweight and designed to perfectly compliment the feel of SID and SID SL forks for a balanced ride. Performance packed with chiseled good looks, every detail is considered with SIDLuxe Ultimate.

Shock Adjustments - Air Spring Pressure / Compression (Open/Lock) / Rebound

The AXS Pod transforms the crucial act of rider inputs into a vastly more personal experience for all of your AXS controls.

Engineered as integrated and interdependent transmission components, the X0 Eagle T-Type derailleur mounts around the wheel axle itself, contacting the cassette directly with a first-of-its-kind Hangerless Interface. Beyond that, its Full Mount attachment method creates a far stronger connection that grips both sides of the frame. The new Transmission derailleurs feature the same intuitive pairing and set-up procedure as our Eagle AXS derailleurs. Featuring an overload clutch that boosts resiliency and a tucked-in profile that houses protection covers on the B-knuckle and outer link that are fully replaceable, or upgradeable to the XX skid plate.

X0 Eagle AXS Transmission Power Meter Crankset provides riders with accurate, live power data delivery housed in our most advanced aluminum crankset. The power meter technology is integrated through what we call “DUB-PWR” – a unique design that elegantly houses Quarq’s reliable and accurate power measurement inside the DUB crank spindle itself. Measuring left-side power to calculate total watts, it’s subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. No-compromise, no-fuss data delivery with robustness in mind.

FEATURES

• Innovative DUB-PWR design allows for lightweight, subtle Quarq power integration.
• Compatible with Flight Attendant
• Unique, groundbreaking design integrated with the lightest aluminum crankset on the market.
• +/- 3% accuracy
• Long battery life (400+hours)
• User replaceable AAA lithium battery
• Waterproof (IPX7 waterproof to 1 meter for 30 minutes)
• 30-34T rings
• Can be run with chainring bash guards

The X0 Eagle Transmission (T-Type) Cassette is a major reason why Eagle Transmission offers the best-ever inboard and outboard shifting performance under load. Engineered as integrated and interdependent transmission components, the X0 Eagle Transmission Cassette and derailleur contact directly, ensuring perfect alignment on every bike. Beyond its unique and stunning Dark Polar finish and electroless nickel plating for incredible resistance to corrosion and wear, its full X-Sync design literally means the harder you pedal, the better it shifts. Its strength is further proven by its full approval for E-MTB use. It’s been built for a 55mm chainline for even more durability and precision thanks to milder chain angles throughout the full range, low to high. From its massive 520% gear range, the 52 tooth cog steps down with improved gear progression with 44 and 38 tooth cogs in the low end (compared to the Eagle drivetrain 10-52-tooth cassette). What else? It has a clearly marked Setup Cog, making install both simple and fool-proof.

FEATURES

• Full X-SYNC for best-ever inboard and outboard shifting performance under load
• Optimized gear steps on low end
• 55mm chainline compatibility for more moderate chain angle, longer wear and greater precision
• Setup Cog for fool-proof set up
• Features X-DOME with a lighter aluminum 12th gear
• Fully E-MTB approved

The GX Eagle Transmission (T-Type) chain is the strongest SRAM has ever made. Specifically engineered to optimize Eagle Transmission, this all-new T-Type design features a unique flat top. In addition to this shape maximizing shifting performance and upgrading the aesthetics of any bike, it is developed specifically for the added torque loads of E-MTB thanks to its solid pins that give it incredible strength.

Level Silver Stealth 4-Piston combines SRAM's new Level Stealth lever with a 4-piston caliper to provide superior power to weight performance. Featuring trail bike stopping power in an XC race weight class, Level features a new lever design purpose made to create a clean, fast looking cockpit. SRAM's tool-free reach adjust is quick and easy, while Lever Pivot Bearing technologies ensure smooth, fatigue-free action.

Known for its no-nonsense smooth cable actuation, short overall length, and easy serviceability, the OneUp Dropper is a solid choice for dependable and customizable performance.

Maxxis Rekon Race is a semi-slick XC race tire that features the lowest profile tread in the XC line. It is a great choice for dry XC trails and short track racing.

• 3C MaxxSpeed: MaxxSpeed is a high-silica content compound which reduces rolling resistance while also enhancing wet traction – the top pick for XC racing.
• EXO: A cut and abrasion-resistant material added to the sidewalls.

Maxxis Rekon Race is a semi-slick XC race tire that features the lowest profile tread in the XC line. It is a great choice for dry XC trails and short track racing.

• 3C MaxxSpeed: MaxxSpeed is a high-silica content compound which reduces rolling resistance while also enhancing wet traction – the top pick for XC racing.
• EXO: A cut and abrasion-resistant material added to the sidewalls.