Overview
The Yeti SB140 is the brand’s mid-travel 29er, sitting between the shorter-travel SB120 and the enduro-oriented SB160. With 140mm of rear travel paired with a 150mm fork (or 160mm in Lunch Ride configuration), the SB140 covers an enormous range of terrain — from backcountry climbing to aggressive technical descents. It uses Switch Infinity suspension with 29-inch wheels and is offered in five sizes (SM–XXL) with Turq and Carbon Series frame options.
New to bike geometry? Our complete guide to mountain bike geometry explains every measurement and what it means for your riding. You can also learn how to read a geometry chart to compare this bike against other models.
The SB140 runs a 65° head angle with a 77° effective seat angle across all sizes. Reach ranges from 429mm (SM) to 521mm (XXL), with size-specific chainstay lengths from 437mm to 445mm. The BB height sits at 343mm — slightly higher than the shorter-travel SB120 (338mm), reflecting the increased travel and fork length. The SB140 LR variant adds a 160mm fork for more aggressive riding, effectively closing the gap toward the SB160 enduro bike while retaining the SB140’s lighter, more efficient platform.
Geometry Diagram
Geometry Table
| Measurement | SM | MD | LG | XL | XXL |
|---|---|---|---|---|---|
| Head Tube Angle | 65.0° | 65.0° | 65.0° | 65.0° | 65.0° |
| Seat Tube Angle (eff.) | 77.0° | 77.0° | 77.0° | 77.0° | 77.0° |
| Seat Tube Length | 366mm | 399mm | 439mm | 470mm | 485mm |
| Reach | 429mm | 460mm | 480mm | 505mm | 521mm |
| Stack | 617mm | 620mm | 625mm | 653mm | 671mm |
| Wheelbase | 1189mm | 1222mm | 1245mm | 1278mm | 1303mm |
| Chainstay Length | 437mm | 437mm | 439mm | 442mm | 445mm |
| BB Height | 343mm | 343mm | 343mm | 343mm | 343mm |
| Head Tube Length | 91mm | 94mm | 102mm | 112mm | 135mm |
| Standover | 727mm | 732mm | 737mm | 739mm | 744mm |
| Fork Offset | 43mm | 43mm | 43mm | 43mm | 43mm |
Geometry Analysis
The SB140’s 65° head angle is a full degree slacker than the SB120 (66.2°), reflecting the step up in descending capability. The consistent 77° effective seat angle ensures efficient climbing regardless of size. The size-specific chainstays (437–445mm) are proportionally longer than the SB120’s (432–442mm), providing the additional stability needed for the SB140’s higher speeds and rougher terrain. The 343mm BB height is well-balanced — low enough for confident cornering but high enough to clear rocks and roots with the longer-travel suspension. The 43mm fork offset maintains the same trail figure as the SB120 despite the slacker head angle, thanks to careful frame geometry design.
Ride Characteristics
The SB140 is arguably the most versatile bike in Yeti’s lineup. It climbs with remarkable efficiency for a 140mm-travel bike — the Switch Infinity suspension resists pedal bob effectively, and the steep seat angle puts the rider in a powerful climbing position. On descents, the SB140 punches well above its travel class. The 65° head angle provides stability at speed, the Switch Infinity suspension soaks up repeated hits without packing down, and the overall chassis stiffness inspires confidence through rough, high-speed sections. The Lunch Ride variant takes this a step further, adding 10mm of front travel for riders who spend more time descending than climbing.
Key Specs
Frame: Carbon (Turq and C Series). Wheel Size: 29″. Travel: 150mm fork / 140mm rear (LR: 160mm fork). Suspension: Switch Infinity. Drivetrain: SRAM/Shimano (build dependent). Fork: FOX 36. Shock: FOX Float. Sizes: SM, MD, LG, XL, XXL.
What’s New vs Previous Generation
The SB140 features updated Switch Infinity kinematics with improved progression for better bottom-out resistance on big hits. Internal cable management has been refined for easier maintenance. The frame maintains Yeti’s emphasis on stiffness at key junctions while reducing weight in non-critical areas. The Lunch Ride option continues to be available, providing a 160mm fork alternative for riders who want to bias the platform toward descending.
Who Should Consider This Bike
The SB140 is ideal for trail riders who want a single bike that can handle everything from long climbs to aggressive descents. If your local trails include a mix of sustained climbing and technical descending, and you want one bike that does both well, the SB140 is a top choice. For pure descending performance, the SB160 is better suited. For lighter, faster riding with less travel, the SB120 is the pick.
Comparable Models
The SB140 competes with the Santa Cruz Hightower (150/140mm), Specialized Stumpjumper 15 EVO (150/140mm), Trek Fuel EX (140/130mm), Ibis Ripmo (147/145mm), and Pivot Switchblade (142/135mm). All are mid-travel 29er trail bikes designed for versatility. The SB140’s Switch Infinity suspension provides excellent pedaling efficiency compared to most competitors, while the Stumpjumper EVO offers more geometry adjustability and the Hightower uses VPP suspension with a slightly different feel.
Related Geometry
More Yeti geometry: 2023 Trek Remedy Geometry, 2023 Yeti SB120 Geometry, 2023 Yeti SB135 Geometry, 2023 Yeti SB140 Geometry, 2023 Yeti SB160 Geometry.
Compare all mountain bikes: Commencal Meta AM 29 2020 Geometry, Commencal Meta AM 29 2021 Geometry, Evil Offering 2025 Geometry.
Frequently Asked Questions
What is the difference between the SB140 and SB140 LR?
The SB140 LR (Lunch Ride) uses the same 140mm rear-travel frame but pairs it with a 160mm fork instead of the standard 150mm. This slackens the head angle by approximately 0.5° and increases the stack height, biasing the bike toward descending performance while using the same efficient chassis. The LR is ideal for riders who favor gravity-oriented terrain.
How does the SB140 compare to the SB160?
The SB140 (140mm rear / 150mm front) is lighter and more efficient than the SB160 (160mm rear / 170mm front). The SB140 is the better all-rounder for mixed terrain, while the SB160 is purpose-built for enduro racing and aggressive descending. If your rides are roughly 50/50 climbing and descending, the SB140 is the better choice. If you prioritize downhill performance, choose the SB160.
Does the Yeti SB140 use 29-inch wheels?
Yes, the SB140 runs 29-inch wheels across all sizes (SM through XXL). This provides maximum rollover speed and stability, complementing the bike’s trail-oriented geometry.
What sizes does the Yeti SB140 come in?
The SB140 is available in five sizes: SM, MD, LG, XL, and XXL. Unlike the SB120 which adds an XS size, the SB140 starts at SM, which Yeti finds appropriate for the bike’s intended riding style.
Is the Yeti SB140 good for bike parks?
The SB140 can handle moderate bike park terrain, especially in LR (Lunch Ride) configuration with 160mm fork. However, for dedicated bike park use with large drops and rough features, the SB160 or SB165 would be better choices with more travel and geometry optimized for aggressive descending.