Yeti has retired Switch Infinity. After more than a decade defining the brand's mountain bikes, its distinctive suspension system has been replaced on the new LT by Sixfinity, a six-bar platform.The new LT replaces the SB160 enduro bike, but retains its predecessor's 170mm fork and 160mm of rear travel. The real story, though, is the introduction of a completely new suspension platform.Sixfinity has spent more than 10 years in development, appearing on the 160E, LTe and MTe eMTBs, while also being refined through Yeti's World Cup downhill programme. Its now making the move to the brand's flagship pedal-powered enduro bike.How Sixfinity works The LT is Yeti's first pedal-powered bike to use the Sixfinity suspension platform. Yeti Cycles Rather than relying on Switch Infinity's sliding mechanism, Sixfinity uses six bars to control both the rear-wheel path and the shock. Alongside the frame, chainstays and seatstays are three additional links the rocker link, timing link and switch link.The rocker link drives the shock, while the timing link controls the movement of the switch link as the suspension moves through its travel.That extra level of control is the main reason Yeti has spent more than a decade developing the platform. Unlike Switch Infinity, Sixfinity enables anti-squat, anti-rise and leverage rate to be tuned much more independently of one another.In practice, that means engineers can increase pedalling support without dramatically affecting braking behaviour, or alter suspension progression without compromising either. The Switch Link is the heart of the Sixfinity system. Yeti Cycles Yeti says the switch link is key to making that happen. As it moves upwards through the early part of the suspension travel, it generates higher anti-squat around the sag point, improving pedalling efficiency.Deeper into the travel, the timing link causes the switch link to change direction, reducing anti-squat so the suspension can move more freely over rough terrain.At the same time, anti-rise can be tuned separately to help the bike remain composed under braking while maintaining traction.Yeti has also tuned each frame size with individual kinematics. Rather than simply scaling the geometry, the position of the suspension pivots can be adjusted to deliver more consistent kinematics and handling from the small through to the XL frame.More adjustment than ever A frame-mounted indicator makes it easy to see the selected suspension progression setting. Yeti Cycles Sixfinity also gives riders more control over how the bike rides. A flip chip changes suspension progression between 15, 20 and 25 per cent. The lowest setting delivers a more linear feel, while the highest adds extra progression and bottom-out resistance.The middle setting sits between the two, enabling riders to tailor the suspension to their terrain, riding style or shock preference.Geometry is equally adaptable. The LT can be configured as either a full 29er or mixed-wheel bike using a dedicated flip chip that preserves the bike's geometry between wheel sizes. A dedicated geometry chip enables riders to switch between the 29in and 27.5in wheels. Yeti Cycles Riders can also swap to a separate Slack chip, lowering the bottom bracket by 6mm and slackening the head angle by 0.5 degrees when running the MX setup.Modular rear dropouts also enable riders to extend the chainstay length by 10mm, while Yeti has continued its size-specific rear-centre philosophy, with chainstays ranging from 439mm on the Small to 465mm on the XL to maintain a more consistent front-to-rear weight balance. Yeti continues its size-specific rear-centre philosophy with the LT, but modular dropouts enable riders to add a further 10mm of chainstay length to suit their handling preferences or boost high-speed stability. Yeti Cycles Yeti LT frame updates and pricing detailsThe LT is available only in Yeti's premium TURQ carbon construction, which uses Vectran reinforcement to improve impact resistance while maintaining a compliant ride feel.The frame also gets integrated down-tube storage, called The Cavity, complete with a dedicated storage bag for tools, tubes or snacks. Hidden beneath the storage compartment is space for an Apple AirTag or Tile tracker.There's also a top-tube accessory mount, guided internal cable routing, revised chain-slap protection and standard-sized cartridge bearings designed to simplify servicing.All four complete builds use Fox suspension and Schwalbe's latest radial tyres. The flagship LT X0 has a claimed weight of 15.81kg in its 29in configuration, or 15.62kg with mixed wheels.Prices range from 7,899 / 7,400 for the LT 90 to 9,799 / 10,900 for the LT X0. It's available as a frame-only for 4,699.Yeti LT 90 The LT 90 is the entry point to Yeti's new enduro range. It has the same TURQ carbon frame, Sixfinity suspension platform and adjustable geometry as every model in the line-up. Yeti Cycles Price: 7,899 / 7,400 Weight: 15.99kg, claimed Frame: TURQ carbon, 160mm rear travel Fork: Fox Performance 38, 170mm Shock: Fox Performance Float X Drivetrain: SRAM 90 Brakes: SRAM Maven Base Wheelset: DT Swiss E1900, Schwalbe Magic Mary Trail Pro Radial Ultra Soft / Albert Gravity Pro Radial SoftYeti LT X0/90 The LT X0/90 blends SRAM's mechanical 90 Transmission and X0 drivetrain with a Fox Factory suspension package, offering many of the flagship bike's performance upgrades without the cost of full wireless shifting. Yeti Cycles Price: $8,400 / 8,800 Weight: 16.10kg, claimed Frame: TURQ carbon, 160mm rear travel Fork: Fox Factory 38 Grip X2, 170mm Shock: Fox Factory Float X2 Drivetrain: SRAM 90 with X0 crankset and cassette Brakes: SRAM Maven Silver Wheelset: DT Swiss E1900, Schwalbe Magic Mary Trail Pro Radial Ultra Soft / Albert Gravity Pro Radial SoftYeti LT XT Di2 The LT XT Di2 is the only Shimano-equipped bike in the range, pairing the latest wireless XT Di2 drivetrain with Fox Factory suspension and the same TURQ carbon frame as every LT model. Yeti Cycles Price: $8,900 / 9,500 Weight: 16.00kg, claimed Frame: TURQ carbon, 160mm rear travel Fork: Fox Factory 38 Grip X2, 170mm Shock: Fox Factory Float X2 Drivetrain: Shimano XT Di2 Brakes: Shimano XT four-piston Wheelset: DT Swiss E1900, Schwalbe Magic Mary Trail Pro Radial Ultra Soft / Albert Gravity Pro Radial SoftYeti LT X0 The flagship Yeti LT X0 enduro mountain bike in Turquoise and White. Yeti Cycles Price: 9,799 / $10,200 / 10,900 Weight: 15.81kg (29in) / 15.62kg (MX), claimed Frame: TURQ carbon, 160mm rear travel Fork: Fox Factory 38 Grip X2, 170mm Shock: Fox Factory Float X2 Drivetrain: SRAM X0 Eagle AXS Transmission Brakes: SRAM Maven Silver Wheelset: DT Swiss EXC1700, Schwalbe Magic Mary Trail Pro Radial Ultra Soft / Albert Gravity Pro Radial Soft