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Tern: Eclipse P20 - 2017



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Product Description

Tern: Eclipse P20 - 2017

The Tern Eclipse P20 is a high-performance road bike that folds down fast. With custom 26” Rolf Paired Spoke wheels, a 250 mm Physis™ 3D handlepost, and performance-tuned frame geometry, the Eclipse P20 is engineered for speed. It sports a stealth black finish, hydraulic disc brakes, and hidden design perks like the BioLogic Arx grips with an integrated multi-tool.

-Kinetix™ Pro Disc 26” wheels with patented Rolf Paired Spoke design
-Shimano Tiagra drivetrain for 20 speeds and precise, responsive shifting
-Tektro Auriga hydraulic disc brakes for all-weather stopping power
-Adjustable VRO handlebar stem to fine tune your ride position
-BioLogic Arx™ grips with a hidden multi-tool
-High performance Kojak road tires with puncture protection
-Folds compactly in 10 seconds for storage and transport



COLOR: Black/Red
WHEEL SIZE: 26" wheels
WEIGHT: 12.22 kg (26.9 lb)
FOLDING SIZE: 38 x 90 x 81 cm (15" x 35.4" x 31.9")
GEAR INCHES: 26" - 112" (2.09 - 8.92 m)
DISTANCE: SEATPOST TO HANDLEBAR: Min: 560 mm (22") Max: 710 mm (28")
DISTANCE: SADDLE TO PEDAL: Min: 770 mm (29.7") Max: 1040 mm (40.6")
SUGGESTED RIDER HEIGHT: 148 - 195 cm (4'10" - 6'5")
MAX LOAD WEIGHT: 115 kg (254 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, cartridge bearings, Physis integrated
HANDLEBAR: Kinetix Comp, 6061-Al, VRO butted
GRIPS/BAR TAPE: BioLogic Arx w/ T-Tool
SADDLE: BioLogic Phia, PrimeGel padding
SEATPOST: SuperOversize, 6061-Al, forged clamp
SEATPOST CLAMP: Syntace OverLock
FRONT BRAKE: Tektro Auriga, hydraulic disc
REAR BRAKE: Tektro Auriga, hydraulic disc
BRAKE LEVERS: Tektro Auriga, hydraulic disc
BRAKE CABLE & HOUSING: Tektro Auriga, hydraulic
FRONT HUB: Kinetix Pro Disc, 24H
REAR HUB: Kinetix Pro Disc, 24H
SPOKES AND NIPPLES: Double-butted 18/10 stainless, Sapim Polyax nipples
RIMS: Kinetix Pro X, 24H, 6061-T10 aluminum, patented Rolf Paired Spoke design
TIRES: Schwalbe Kojak, 35-559, foldable, puncture protection, 95 psi
SHIFTER(S): Shimano Tiagra trigger, 2x10 spd
CRANKSET: FSA Vero, 50/34T
CASSETTE/FREEWHEEL: Shimano Deore, 11-32T, 10 spd
BOTTOM BRACKET: Cartridge, sealed bearings
PEDALS: LiteForm QR, alloy body, QR right/standard left
SHIFTER CABLE & HOUSING: Jagwire LEX-SL, slick treatment, alloy ferrules
BELL: Pitch, brass
KICKSTAND: Premium center mount
CLIP SYSTEM: Magnetix 2.0
REAR LIGHT: BioLogic TailLight
REAR LIGHT: Spanninga Solo XDS
FENDERS: RP Chromeplastic, stainless hardware

*Note: These are standard model specifications. The specifications for your country may differ slightly. Tern does their best to ensure that the specifications listed here accurately reflect the exact parts found on their production bikes. However, component changes do occur for various reasons and there may be brief delays on site updates. Tern reserves the right to make component changes without prior notification, which may cause discrepancies with the information listed on the web.



A closer look at the Eclipse P20

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.



Good things are built to last and that’s why the OCL Joint is designed to be dealer serviceable. Tern keeps every part in stock and if your bearings ever wear out, Bike Attack can replace them in a few minutes.



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 Tern's 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.



Good things are built to last and that’s why the Physis is designed to be fully dealer serviceable. Tern keeps every part in stock and replacing the bearings can be done at Bike Attack.


TriSeal Design 

Three rubber seals keep weather out and the headset bearings functioning smoothly.



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.



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.



Only 120 grams. 100% CNC machined from 6066 aluminum.



Two stems spaced widely apart means excellent torsional stiffness so go ahead and crank hard on your bars with confidence.


BioLogic Arx™ Grips with T-Tool


BioLogic Arx grips are quality, ergonomic grips designed to put your hands and wrists in a comfortable position. But they have a hidden secret—a 4/5/6 mm Allen tool hides in the right grip. It’s there when you need it, out of the way when you don’t.



Tektro Hydraulic Disk Brakes 


When you’re going fast, in all sorts of weather conditions, you need brakes that work, and work well. Tektro hydraulics fit the bill with sure, single-finger stopping power.


Kinetix Pro Disc Wheels


Featuring Rolf Paired Spoke technology, Kinetix Pro wheels are strong, durable and fast.


Rolf Paired Spoke™ Technology

Paired Spoke lacing allows us to use fewer spokes at higher tensions, resulting in a wheel that is lighter, stronger, and more aerodynamic.


Double-Butted Spokes 

To reduce weight on your bike, Tern uses nice thin spokes. Tern builds in strength by making them thicker at the ends where stresses are higher.


Resistance to the Elements

Tern's custom-built wheel hubs use sealed cartridge bearings to resist to dirt and water.


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 Tiagra 2 x 10 Drivetrain 


To give you awesome climbing gears while maintaining downhill speed, Tern pair an 11-32T cassette, compact double 50/34T crankset, and Shimano Tiagra derailleurs.


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.


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