Tern Eclipse X22

Product Description

The Eclipse X22 is designed to be the fastest folding bike in the world. With hand-built 26” wheels and race-tuned geometry, it’s a full sized road bike, but it folds down small in 10 seconds. It boasts an Ultegra drivetrain, and—just in time for the UCI’s new regulations—a set of Shimano hydraulic disc brakes. With a stealth black finish, hydroformed fork, red Syntace accents, and perfected engineering, the X22 inaugurates a new chapter in Tern design.

  • Kinetix Pro X 26” wheels with straight-pull Sapim spokes for a blazingly fast ride
  • Shimano Ultegra / 105 drivetrain for 22 speeds and Grand Tour gear inches
  • Shimano SLX hydraulic disc brakes for extreme stopping power
  • Adjustable VRO handlebar stem to fine tune your ride position
  • High performance Kojak road tires with puncture protection
  • SR-71 matte finish
  • Fold and store indoors for the best theft protection

Tech Specs


WHEEL SIZE: 26" wheels

SPEEDS: 2 x 11

WEIGHT: 11.3 kg (24.9 lb)

FOLDING SIZE: 42 x 89 x 81 cm (16.5" x 35" x 31.9")



GEAR INCHES: 30" - 112" (2.38 - 8.92 m)

DISTANCE: SEATPOST TO HANDLEBAR: Min: 600 mm (23.6") Max: 640 mm (25.2")

DISTANCE: SADDLE TO PEDAL: Min: 770 mm (30.3") Max: 1040 mm (40.9")

SUGGESTED RIDER HEIGHT: 148 - 195 cm (4'10" - 6'5")

MAX LOAD WEIGHT: 105 kg (230 lb)


FRAME: Tern Eclipse, hydroformed 7005-Al w/ smooth TIG welding, 3 patented technologies

FORK: Tarsus, 6061-AL, hydroformed


HANDLEPOST: Tern Physis 3D (G2), 3D forged, 5 patented technologies

STEM: Syntace VRO, adjustable

HEADSET: Flux Pro, angular contact bearings, Physis integrated

HANDLEBAR: Kinetix Pro X, 7050-Al, multi-stage butted

GRIPS/BAR TAPE: Ergon GS1 Leichtbau

SADDLE: Ergon SMC30 Pro, TiNox Rails

SEATPOST: Stasis by Syntace, 7050-AL, hard-anodized

SEATPOST CLAMP: Syntace OverLock


FRONT BRAKE: Shimano SLX, hydraulic disc

REAR BRAKE: Shimano SLX, hydraulic disc

BRAKE LEVERS: Shimano SLX, hydraulic disc

BRAKE CABLE & HOUSING: Shimano SLX, hydraulic


FRONT HUB: Kinetix Pro X Disc, 20H, straight-pull

REAR HUB: Kinetix Pro X Disc, 20H, straight-pull, asymmetric flange

SPOKES AND NIPPLES: Sapim CX-Sprint, internal Polyax nipples

RIMS: Kinetix Pro X, 6061-T10 aluminum, patented Rolf Paired Spoke design

TIRES:Schwalbe Kojak, 35-559, foldable, puncture protection, 95 psi


SHIFTER(S): Shimano Ultegra trigger, 2x11 spd


REAR DERAILLEUR: Shimano Ultegra

CRANKSET: FSA Gossamer Pro, 50/34T, BB386 oversized aluminum spindle

CASSETTE/FREEWHEEL: Shimano 105, 11-28T, 11 spd


CHAIN: Shimano 105, 11 spd


SHIFTER CABLE & HOUSING: Jagwire LEX-SD, ultra-slick polymer coating, alloy ferrules


BELL: Pitch, Brass

CLIP SYSTEM: Magnetix 2.0


REAR LIGHT: BioLogic TailLight



*Note: These are our standard model specifications. The bike's weight and folded dimension may not include racks and fenders. The specifications for your country may differ slightly. We do our best to ensure that the specifications listed here accurately reflect the exact parts found on our production bikes. However, component changes do occur for various reasons and there may be brief delays on site updates. We reserve the right to make component changes without prior notification, which may cause discrepancies with the information listed on the web.


N-Fold™ Technology


With N-Fold Technology, Tern bikes fold small and fast—in three easy steps. It’s simple enough for anybody to master. And with the handlepost folded to the outside of the package, Tern bikes can also roll when folded for easy transport.


OCL™ Frame Joint


The key to any folding bicycle is the frame, and specifically, the folding joint at the heart of the frame. Done well, it locks the two halves of the frame together without any hint of movement or sound. It should be easy to operate and work flawlessly year after year. The OCL Joint does all of these things and is a new reference in folding frame technology.

  • Stronger by Design Making the hinge taller and moving the pivoting surfaces outward from the center axis more than doubles overall strength and stiffness. It’s a difference you’ll feel from your very first ride.
  • Smooth Operation The patented design puts four igus® bearings between the aluminum and stainless steel moving parts so the folding action is always smooth and friction-free.
  • Interlocking Joint The front and rear joint surfaces lock together to eliminate torsional movement.
  • Easy to Use Large rounded surfaces on the lever and joint bodies are easy on your hands and allow good leverage for easy operation.
  • Doubly Safe Close the lever and the AutoLok automatically locks in place, for extra, easy security.
  • Floating Point Technology Patented technology allows the lever to fold flat and brace against the joint for protection in transit.
  • Serviceable Good things are built to last and that’s why the OCL Joint is designed to be dealer serviceable. We keep every part in stock and if your bearings ever wear out, your dealer can replace them in a few minutes.
  • Precision-Machined A machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.
  • Stainless Steel Hardware Cold-worked stainless delivers the durability and reliability needed for daily riding in all weather conditions.


DoubleTruss™ Technology


The rear half of Tern frames use a patented 3D structure we call DoubleTruss to build in extra stiffness. It helps resist torsional forces so our bikes flex less. That means increased stiffness and much better power transfer from the pedals to the rear wheel. The proof’s in the ride.


Tarsus™ Fork


Utilizing a single hydroformed tube mated to a precision-machined steerer, the Tarsus delivers superior strength in a shape that matches the sophisticated lines of the Verge and Eclipse frames.

  • Hydroformed Tubing The process of hydroforming aligns the grain structure and strengthens the aluminum material. It also minimizes welding in the most highly stressed area of the fork.
  • Internal Wire Routing If you decide to equip your Tarsus with a dynamo hub, it’s ready for internal cable routing, keeping the profile of your bike clean.


Physis™3D Handlepost


Five patented technologies and unique manufacturing technology add up to the strongest, stiffest folding handlepost available. The Physis uses a special manufacturing process called 3D forging, which forms the post from a single piece of aluminum, eliminating all welds.

  • No Flex To eliminate flex, the Physis uses a massive joint knuckle and a post that gradually tapers from thick at the base to thin. Moreover, it has 150% more clamping height between the fork steerer and the handlepost than common designs.
  • Flux Technology The base of the Physis is machined so it functions as the upper race of the headset. This patented direct integration contributes to the incredible stiffness of the design.
  • Interlocking Halves Joint surfaces lock together to improve torsional stiffness. We've fine-tuned the shape to virtually eliminate squeaks.
  • Redundant Double Bolts Two bolts clamp the Physis to the fork steerer for improved safety.
  • igus® Bearings The patented design puts sliding bearings between the moving parts so the folding action is always smooth and friction-free.
  • Large, Smooth Lever Large rounded surfaces are easy on your hands and provide good leverage for easy operation.
  • AutoLok Technology Close the lever and it automatically locks in place, for extra, easy security—using an aluminum pin.
  • Floating Point Technology Patented technology allows the lever to fold flat and brace against the joint for protection in transit.
  • SpringLock Technology Patented SpringLock technology holds the adjustment rod firmly in place so the locking lever is always properly tensioned and can never vibrate loose.
  • Serviceable Good things are built to last and that’s why the Physis is designed to be fully dealer serviceable. We keep every part in stock and replacing the bearings can be done in minutes.
  • TriSeal Design Three rubber seals keep weather out and the headset bearings functioning smoothly.
  • Precision-Machined A machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.


Syntace VRO Stem


Your bike should adapt to fit you―not the other way around. This adjustable stem allows you to position your handlebars further, for a more stretched and aggressive riding position, or up higher for increased comfort.

  • Adjustable Stems are 47mm in length and infinitely adjustable so you can find your perfect fit.
  • Syntace quality Syntace is a boutique German company renowned for their best-in-class bicycle components that are selected by many champion professional riders. They are perhaps best known for their manic attention to detail and brutal testing standards.
  • Light Only 120 grams. 100% CNC machined from 6066 aluminum.
  • Strong Two stems spaced widely apart means excellent torsional stiffness so go ahead and crank hard on your bars with confidence.


Kinetix™ Pro X Handlebar


At a feathery 160 grams, the Pro X handlebar is one of the lightest aluminum handlebars available. Multi-stage butted from 7050 aluminum and designed specifically for our VRO and Andros handlebar stems.


Stasis Seatpost by Syntace


The Stasis is based on Syntace’s renowned P6 design and is incredibly light, yet durably strong. It is forged from 7075 aluminum and hard-anodized for extra durability. Packed with smart engineering details that make the post easy to use and adjust.

  • Syntace Tested Syntace testing is done on what they call the Red Monster and it exceeds the DIN+ standard which is typically used for freeride and downhill components. Needless to say, if it passes Syntace testing, its plenty strong enough for our bicycles.
  • Light In the 33.9 x 580 mm size, the Stasis seat post weighs only 447 grams, lighter than many carbon posts of the same size.
  • Easy Adjustment Syntace’s ERS technology delivers loads of fore/aft adjustment for the saddle. You can run the saddle forward for zero offset stiffness, or all the way back when you want more room to stretch in the cockpit.
  • Easy to Use Two-bolt micro adjustment allows for an infinite number of saddle angles. Obsessive attention to detail means the bolts are angled outward at 40 degrees for easy tool accessibility.


MKS UB-Lite EZY Pedals


The benchmark in quick release pedals, MKS pedals are made in Japan to exacting standards. Ubi pedals are double-sided.


Shimano Hydraulic Disc Brakes


Shimano hydraulic disc brakes deliver powerful stopping power in all weather conditions with the touch of a finger.


Kinetix Pro X Disc Wheels


Kinetix™ Pro X Disc Wheels are engineered from the ground up for speed and performance. With custom-forged bladed Sapim spokes, CNC machined hubs, and high-profile rims, they’re light, strong, and look pretty fine too. Even better, they’re 100% hand-built and hand-trued.

  • Rolf Paired Spoke™ Technology Paired Spoke lacing allows us to use fewer spokes at much higher tensions, resulting in a wheel that is lighter, stronger, and more aerodynamic.
  • Self-Aligning Nipples Sapim nipples have a convex surface that allow perfectly straight alignment of the spokes. This increases strength and durability by eliminating the most common type of spoke breakage.
  • Hand-Built Kinetix Pro wheels are built by hand from start to finish by a single wheelsmith. The wheelsmith goes through at least three cycles of truing and spoke de-stressing before the wheel meets our rigorous standards.
  • Kinetix Pro X Hubs Pro X hubs are precision machined for perfect spoke alignment and roll on smooth sealed bearings. Front and rear hubs feature flanges that are closer together—optimizing the bracing angle for a smaller wheel.
  • EN Certified The wheels exceed EN standards for strength and durability.


Schwalbe Kojak Tires


Light and fast tires with enough volume to keep things comfy. Kojak’s are ideal for fast commutes or longish weekend rides.


Shimano Ultegra 2 x 11 Drivetrain


Shimano’s updated 11 speed Ulegra group delivers butter smooth shifting


FSA MegaEVO BB386 Crankset


You wouldn’t think something as small as a bottom bracket would make a big difference to your ride experience. But you’d be wrong. The massive aluminum spindle and oversized outboard bearings make this crankset incredibly effective at turning your pedaling into forward momentum.


Magnetix™ 2.0


The Magnetix 2.0 uses powerful magnets to keep your bike folded for situations like carrying your bike up and down stairs. With a pull force 10-15 Kgf, the Magnetix 2.0 will keep your bike folded even when being jostled and moved about.


Luggage Socket™


Fix the Tern Luggage Truss to the Luggage Socket and you can plug in your choice of front luggage: rack, basket, or bag. If it’s KlickFix compatible, it’ll work.


BioLogic TailLight™


A combination LED light and reflector sits up high on the rear of your saddle to make it visible to cars coming up from behind. The bright LED light lets you switch between blinking and steady modes.

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