The Yeti Cycles SB165 2026 stands as the peak expression of the Golden, Colorado brand in the Bike Park, Freeride, and Super Enduro categories. Built around Yeti's iconic Switch Infinity V2 suspension system paired with a coil shock, the SB165 runs an MX (Mullet: 29" front / 27.5" rear) wheel setup with 170 mm of front travel and 165 mm out back. Designed to shred the most extreme bike park lines, clear massive jumps, and swallow rowdy terrain, the SB165 surprises with a level of climbing efficiency rarely seen on a heavy-hitting gravity rig.
CyclOnline Rating: 9.3 / 10
Verdict: The ultimate gravity bike for riders who prioritize fun, jumps, and steep chutes above all else, without sacrificing the ability to pedal back to the summit.
Recommended Spec: SB165 T3 X0 AXS Transmission (featuring the TURQ carbon frame, FOX DHX2 Factory coil shock, FOX 38 Grip X2 fork, and SRAM Maven brakes).
In Short: Key Takeaways
Category: Freeride / Bike Park / Super Enduro (Mullet Wheels: 29" Front / 27.5" Rear).
Frame Technology: TURQ Series Carbon Fiber (lighter and stiffer) or C/Series, Switch Infinity V2 system, 73 mm BSA threaded bottom bracket shell, and UDH derailleur hanger.
Suspension Travel: 170 mm Front (FOX 38 Fork) / 165 mm Rear (FOX DHX2 Coil Shock).
Geometry: Slack 63.5° head tube angle, steep 77.5° effective seat tube angle, size-specific chainstays.
Pros: Sensational big-hit absorption, endless traction via Switch Infinity + coil shock, lively handling in tight turns and air, surprisingly efficient climbing for its travel class.
Cons: Elite price tag, requires routine maintenance of the Switch Infinity mechanism, sensitive to thick mud buildup around the translating link.
Frame & Switch Infinity V2 Technical Analysis
The heart of the Yeti SB165 2026 lies in its refined carbon frame architecture and proprietary suspension patent.
Switch Infinity V2 System: Utilizes a patented FOX translating linear pivot mechanism. The slider translates upward early in the travel to optimize pedaling platform and anti-squat, then reverses direction deep in the stroke to eliminate pedal kickback and swallow big impacts. The V2 update introduces improved seals and redesigned bearings to extend service intervals.
Coil-Optimized Kinematics: The leverage curve features pronounced end-stroke progressivity. This allows the use of linear coil shocks (like the FOX DHX2) for subtle small-bump sensitivity without risking harsh bottom-outs on heavy jump landings.
Frame Protection and Cable Routing: Features fully guided internal cable tunnels for silent operation. Thick, high-density rubber guards line the down tube and chainstay, accompanied by a hassle-free threaded BSA bottom bracket.
Gravity Geometry and Handling Setup
The SB165 features numbers tailor-made to inspire confidence when the terrain turns vertical.
Slack 63.5° Head Angle: True downhill-bike territory, stabilizing the front end through steep chutes and high-speed rock gardens.
Mullet Setup (29"/27.5"): The 29" front wheel rolls over obstacles effortlessly and holds a line, while the 27.5" rear wheel offers extra butt clearance on steep roll-ins and makes the bike quick to whip around tight corners.
Steep 77.5° Seat Tube Angle: Despite its gravity DNA, the upright seat angle centers the rider's weight directly over the bottom bracket, preventing that "sitting over the rear axle" feeling on climbs.
Trail Performance: Climbing, Rolling, and Descending
1. Climbing Performance (Technical & Asphalt)
On climbs, the SB165 defies expectations for a 170/165 mm gravity bike:
Switch Infinity Efficiency: The rear suspension remains neutral under pedaling loads. Pedal bob is minimal even without engaging the climb switch on the FOX DHX2.
Technical Ledges & Roots: The rear coil shock keeps the tire glued to the ground, delivering impressive traction over loose rocks and wet roots.
Weight & Inertia: You still feel the bike's overall weight and soft sticky-compound gravity tires, making ascents a steady pace rather than a race to the top.
2. Rolling & Flow Sections
On flatter terrain, the bike requires active rider input to maintain momentum:
Maintaining Flow: The Mullet configuration allows riders to pump through roller sections and snap out of tight berms easily.
Jump Pop: Unlike traditional coil-shocked bikes that feel glued to the trail, the SB165 maintains plenty of mid-stroke support to pop off lip jumps and double features.
3. Descending Performance (Bike Park, Steeps, and Rock Gardens)
The SB165 shows its true dominance on high-speed, technical descents:
Small-Bump Sensitivity: The combination of the Switch Infinity link and DHX2 coil shock erases trail chatter, maximizing traction on off-camber roots and loose scree.
Steep Chute Control: The 63.5° head angle eliminates any endo sensations, encouraging riders to let off the brakes where they might otherwise drag them.
Air Time and Cornering: The 27.5" rear wheel makes squaring off corners, slapping berms, and whipping the bike in the air second nature.
Component Analysis & Field Test (T3 X0 AXS Build)
FOX Factory 38 GRIP X2 Fork (170 mm): The updated GRIP X2 damper offers independent high/low-speed compression and rebound adjustments, delivering tracking stiffness under heavy braking.
FOX Factory DHX2 Coil Rear Shock: Benchmark coil plushness featuring a 2-position climb lever to firm up the rear end on ascents.
SRAM X0 Eagle AXS Transmission: The hangerless Full Mount architecture is virtually bombproof, providing seamless shifts under full load.
SRAM Maven Silver Brakes (200 mm Rotors Front & Rear): High-powered 4-piston stoppers that deliver massive deceleration with minimal arm pump on long alpine descents.
DT Swiss Custom EX1700 Wheels: Heavy-duty, reliable alloy Enduro rims built on proven Ratchet System hubs.
Schwalbe Magic Mary / Albert Gravity Pro Tires (2.5"): Ultra-soft compounds paired with downhill-ready casings for maximum cornering grip.
Pros and Cons
Pros
Superior Descending Performance: Delivers true freeride/DH capability on aggressive terrain.
Switch Infinity V2 Efficiency: Best-in-class pedaling efficiency and traction for a long-travel bike.
Playful Mullet Agility: Snappy corner entry and easy maneuverability off jumps.
TURQ Carbon Quality: Premium finish, quiet internal routing, and exceptional frame stiffness.
Cons
Premium Price Tag: Positions itself at the high end of the market.
Switch Infinity Maintenance: Requires regular grease service using the dedicated grease ports.
No In-Frame Storage: Lacks an integrated down tube storage compartment (SWAT/Storage box).
Detailed Technical Specifications
Frame: TURQ Series Carbon Fiber, Switch Infinity V2 Technology, 165 mm Travel, 73 mm BSA Shell, UDH Hanger
Fork: FOX Factory 38, GRIP X2 Damper, 170 mm Travel, 44 mm Offset
Rear Shock: FOX Factory DHX2 2-Position Lever (Coil), 230x65 mm
Rear Derailleur: SRAM X0 Eagle Transmission 12-speed (Wireless)
Shifter: SRAM AXS Pod Controller
Crankset: SRAM X0 Eagle Transmission, 30T Chainring, 165 mm Length
Cassette: SRAM X0 Eagle Transmission, 10-52T
Brakes: SRAM Maven Silver 4-piston, SRAM HS2 Rotors 200 mm (Front) / 200 mm (Rear)
Wheelset: DT Swiss EX1700, 30 mm Internal Width, DT Swiss Ratchet System Hubs
Tires: Schwalbe Magic Mary Trail Pro 29x2.5" Ultra Soft (Front) / Schwalbe Albert Gravity Pro 27.5x2.5" Soft (Rear)
Cockpit: Yeti Carbon Handlebar 35x780 mm (35 mm Rise) with Burgtec Enduro MK3 50 mm Stem
Dropper Post: FOX Transfer Factory, 31.6 mm (150 mm to 200 mm travel depending on frame size)
Measured Weight: ~15.6 kg / 34.4 lbs (Size Large, Tubeless, without pedals)
MSRP (Approx.): € 9,800 / $ 9,500 (T3 X0 AXS Build)
Market Comparisons and Alternatives
VS Santa Cruz Nomad V6: The Nomad uses a VPP linkage and a Mullet setup with 170 mm travel front and rear. While the Nomad offers the convenience of an in-frame Glovebox storage compartment, the Yeti SB165 pedals more efficiently on long climbs thanks to the Switch Infinity mechanism.
VS Specialized Kenevo / Enduro: Compared to a full 29er Specialized Enduro, the Yeti SB165 feels significantly more agile, playful, and responsive in tight corners and off bike park jump lips due to its 27.5" rear wheel.
VS Pivot Firebird: The Firebird features a DW-Link platform and full 29" wheels aimed squarely at World Cup Enduro racing against the clock. The SB165 is built less for race clocks and more for a playful, freeride-oriented riding style.
Who Should Buy the Yeti SB165 2026?
The Yeti SB165 is an ideal choice for:
Freeriders and Bike Park Laps: Riders seeking a tough bike built for big jumps, drops, and steep DH lines.
Riders Who Pedal Their Descents: Mountain bikers who want a coil-shocked 165/170 mm rig without being forced to rely on chairlifts or shuttles to get to the top.
Boutique Brand Enthusiasts: Riders who appreciate Yeti's carbon craftsmanship, attention to detail, and the performance of the Switch Infinity linkage.
It is not recommended for riders looking for a dedicated Enduro race bike where full 29er momentum on flat pedal sections matters, lightweight trail riders doing 2,000+ meter climbing days, or those seeking a zero-maintenance bike.
FAQ - Frequently Asked Questions
How often does the Switch Infinity mechanism require service?
Yeti recommends greasing the Switch Infinity bushings via the built-in grease ports using FOX grease every 40–50 hours of ride time under normal conditions, or more frequently if riding regularly in wet, heavy mud.
Can I run an air shock instead of a coil shock?
Yes, the frame is compatible with large-volume air shocks (such as the FOX Float X2 or RockShox Vivid). However, the SB165's leverage curve was engineered specifically around the feel of a coil shock.
Can I convert the bike to a Full 29er?
No, the rear triangle is designed exclusively around a 27.5" rear wheel. Installing a 29" wheel in the rear negatively alters the geometry and tire clearance.
What is the maximum rear brake rotor size?
The frame uses a native 180 mm post mount but accepts adapters for rotors up to 220 mm front and rear.
Final Verdict
The Yeti SB165 2026 stands out as one of the most complete freeride and park bikes on the market. By pairing the agility of a Mullet setup with the endless grip of the Switch Infinity V2 system, it delivers a thrilling, stable, and confidence-inspiring ride on steep descents—while retaining climbing efficiency that sets the standard for its category.