Eclipse X20

The Pirate Ninja

It’s more than fast and light enough to launch a brigand’s attack on an unsuspecting roadie, yet stealthy enough to slip – folded and shrouded – into the subway unnoticed. The Eclipse X20 is as lithe and sleek as a ninja. But with its super-wide 25-107” gear range and lightning-fast Kinetix Pro wheels it’s got pirate-worthy swagger that demands attention. Slice to the heart of the city – whether you prefer a katana, a cutlass, or both. A winning combination if there ever was one. Debate settled.

Photo may show optional accessories.
N-Fold Technology

The Faster Fold

Folding bicycle design hasn’t changed much in decades. N-Fold Technology is a small but important change that results in a faster, and more compact fold. N-Fold Technology includes new frame and handlepost geometries and spins the front wheel by 180 degrees before the central fold, resulting in a package 40 mm (1.5") shorter. Using N-Fold technology, our Eclipse and Castro bikes are only very slightly larger than the typical small wheel folding bicycle. Bicycles with N-Fold technology can also be folded – easily – in less than ten seconds.

Continue reading

OCL Joint

Stronger, Better, State of the Art

The OCL Joint is a new reference in folding frame technology. It includes two new patents and everything we know about making the safest, strongest, and most durable frame joint.

  • Taller, Stronger, Stiffer — Making the hinge taller and moving the pivoting surfaces outward from the center axis more than doubles overall strength and stiffness and it’s a difference you’ll feel from your very first ride.

Continue reading

DoubleTruss

3-D = Stronger

Folding bikes have a sometimes deserved reputation for flexy frames. All Tern frames feature patented DoubleTruss technology which turns the rear half of the frame into a three dimensional truss so that it’s much more resistant to torsional forces. That equals increased stiffness and much better power transfer from the pedals to the rear wheel.

Continue reading

Smooth TIG Welding

Beauty Meets Function

The normal TIG welding process for aluminum bicycle frames is done by hand and involves the welder laying down a series of small, overlapping beads covering the two parts to be joined. The better the welder, the more uniform the beads. In the smooth TIG process, the welder makes a “double pass”, laying down a second layer of beads on top of the first. These beads are then sanded down by hand in an intensive process that requires extreme care. Done properly, the frame is strengthened because the possibility of stress risers is reduced. And the result is a very smooth weld joining the two tubes.

Continue reading

Physis 3D Handlepost

3D-Forged = Even Stronger, Stiffer, Better Ride

The Physis has quickly built a reputation as the stiffest folding handlepost on the market, but the Physis 3D takes it up a notch with 3D forging technology. The Physis 3D is forged from a single piece of aluminum. Only a small handful of factories around the world can 3D forge such a complicated, large piece. Welds are eliminated and material distribution optimized for strength. The result is a handlepost that is 2 1/2 times as strong as the original benchmark on rigorous EN tests.

Continue reading

Syntace VRO 47 Stem

Fitted to You

The VRO 47 stem gives you all-important adjustability so you can fine-tune your riding position for speed or comfort. The stem is 47 mm long (14 mm longer than the standard VRO) and it’ll go anywhere from -45 degrees to +90 degrees or even backwards if you want to reduce the reach. And it exceeds Syntace’s brutal in-house test procedures for downhill gear. Custom-built for Tern.

Syntace is a German company renowned for their incredibly light but amazingly strong stems and bars.

Continue reading

Ergon GS2 Leichtbau Grips

Grab Hold

If you’ve never ridden with bar ends, you owe it to yourself to give ’em a try. Stand up and climb or just haul ass, the extra torque and control is like nothing you’ve experienced before. GS2 grips are bigger with softer and more generous wings to reduce pressure on your ulnar nerve and ease wrist strain. The soft kraton rubber main body gives just enough while a textured rubber insert on top dissipates jolts and vibration.

Continue reading

Stasis Seatpost by Syntace

Ultra-light, ultra-tough

The Syntace P6 is one of the strongest and precisely engineered seatposts on the market. We wanted the best so we worked with Syntace to develop a 580 mm seat post with a variation of their 3D cold-forged P6 clamp. Made from ultra-light 7075 aluminum and hard-anodized (black color option) for scratch resistance. 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 like an offset seatpost. Two bolt micro adjust for infinite angle adjustment.

Continue reading

Light and Fast

The Kinetix Pro 507 wheels represent everything we know about making the best possible wheels, costs be damned. We start with the best ingredients: custom ultra-light American Classic hubs rolling on stainless steel bearings; Sapim bladed spokes custom-forged to our specific lengths; Niobium-alloy rims that are light but incredibly strong. A master wheel-builder then hand laces each wheel to incredibly strict standards as defined by the man, Rolf Dietrich. Each wheel is laced and trued, de-stressed with our custom Black Box, trued again, and de-stressed, before the final truing.

Continue reading

Schwalbe Kojak Tires with RaceGuard Puncture Protection

Liven Up Your Ride

We’re pretty sure the folks at Schwalbe were thinking ‘70s American TV when they named this tire because, yes, Kojaks are bald and more than a little sassy. Comfortable and surprisingly fast, we like the SpeedGrip multilevel dual compound for high levels of grip and low levels of rolling resistance. And there’s the proven RaceGuard protection belt, developed specially with racing in mind. Who loves ya baby? Kojak does. Ol’ Telly would be proud.

Continue reading

Magnetix 2.0

Better Together

Our first-generation Magnetix were good and sticky. They did a fine job of holding a folded bike together. But in some situations – like carrying a bike up and down stairs – the magnets just weren’t strong enough. Our new Magnetix 2.0 increases the strength of the magnets by 300% to keep your bike folded even when being jostled and moved about. The previous Magnetix had a pull force of 4-5 Kgf. The improved version clocks in at 10-15 Kgf. We like the new Magnetix 2.0 a ton and think you will too.

Continue reading

Tern Tail Masked Paint

Super-fine Details

Getting this finish just right needed a LOT of work with our paint factory. It basically involves incredibly meticulous hand-masking to achieve the final result. With the silver/black finish, we hand-polish the aluminum frame to a mirror finish and then follow that with hand-masked black paint. Detail: the shape of a Tern’s tail is echoed in the paint masking.

Continue reading

Specifications

General Info
Color:
Wheel Size: 24 inch wheels
Speeds: 20
Weight: 10.7 kg (23.6 lb)
Folding Time: 10 sec
Folding Size: 42 x 89 x 76 cm (16.5" x 35.0" x 29.9")
Frame Sizes: One size
Gear Inches: 25" - 107"
Distance: Seatpost to Handlebar: Min: 560 mm (22.0") Max: 700 mm (27.6")
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 Rider Weight: 115 kg (254 lb)
Miscellaneous
Bell: Aluminum
Frame
Frame: Eclipse, hydroformed 7005-Al w/ smooth TIG welding, patented OCL Joint and DoubleTruss technology, Igus bearings
Fork: Aluminum 6061
Cockpit
Handlepost: Physis 3D, Igus bearings, 4 patented technologies
Stem: Syntace VRO 47
Headset: Flux Pro, angular contact cartridge bearings, dual-seal technology, machined aluminum cups
Handlebar: Kinetix Pro, double-butted 7050-AL, for VRO
Grip/Bars Tape: Ergon GS2 Leichtbau
Saddle: Kore Road Performance, SL foam, hollow cro-mo rails
Seatpost: Stasis by Syntace, 7050-AL, hard-anodized
Seatpost Clamp: Syntace OverLock
Brakes
Front Brake: Kinetix Pro, Ashima Aero CNC cartridge brake pads
Rear Brake: Kinetix Pro, Ashima Aero CNC cartridge brake pads
Brake Levers: Avid Speed Dial 7
Brake Cable & Housing: LiveWire 7.0, anti-compression housing, slick cables, DuPont L3 lubricant, alloy ferrules
Wheels
Front Hub: Kinetix Pro by American Classic, stainless steel cartridge bearings, ultralight 58 gram design
Rear Hub: Kinetix Pro by American Classic, stainless steel cartridge bearings, ultralight 205 gram design
Spokes and Nipples: Sapim CX-Wing Bladed, custom forged
Rims: Kinetix Pro, matte anodized finish, laser-etched graphics
Tires: Schwalbe Kojak, 40-507, foldable Kevlar bead, RaceGuard puncture protection, 85 psi
Transmission
Shifter(s): SRAM SL700 flatbar trigger, 2 x 10 spd.
Front Derailleur: SRAM Rival
Rear Derailleur: SRAM Force
Crankset: FSA Gossamer Compact, 50/34T, BB386 oversized aluminum spindle
Cassette/Freewheel: SRAM 10 spd., 11-32T, alloy spider
Bottom Bracket: FSA MegaEVO, BB386
Chain: KMC X10L
Pedals: MKS EZY QR
Shifter Cable & Housing: LiveWire 8.0, sealed alloy ferrules, DuPont L3 lubricant
Extras
Clip System: Magnetix 2.0
Luggage Socket: Yes
Rear Light: BioLogic TailLight
Outside Online
November 25, 2013

"Lots of folding bikes are sluggish and clunky. Not the X20. Thanks to larger-than-most 24-inch wheels and an impressive array of high-end components, the X20 is downright zippy It also weighs less than 24 pounds and folds down to half its size, making it easy to throw in a trunk or cary up stairs."

Read the full article online here.

LA Times
October 11, 2013

"A superb ride. It has the best of both worlds: a compact fold-up bike with a "big-bike" ride, due to wheels just 2 inches shorter than those of a mountain bike. "

Read the full article online here.

Czech Online Mag
September 10, 2013

"Celkově je tento model ideální pro dojíždění po kvalitní cyklostezce a spíše po rychlejší rovině, kde naplno vyniknou jeho sportovní ambice podpořené i nízkou hmotností. Trápit se na hladkých pláštích a svazkovém výpletu po rozbité dlažbě, na to je této luxusní verze přece jen trochu škoda."

Read the full article online here.

faz.net
June 2, 2013

"Es gibt gute Gründe für den Besitz von mehr als einem Faltrad. […] Mit dem Eclipse X20 kann man jederzeit an einer radsportlichen Jedermann-Veranstaltung teilnehmen."

Read the full article online here.

Cykelportalen
May 9, 2013

"Ordet foldecykel er simpelthen ikke et fint nok superlativ for Eclipse X20. Der meget mere tale om en velkonstrueret og bygget sporty kompakt dagligdagscykel som i tilgift kan sammenfoldes. Den kører og opfører sig som en almindelig sportscykel, og giver i tilgift den funfactor med i købet alt for mange dagligdagscykler mangler. Cyklen er svær at sætte i bås hvad der sikkert vil gøre den endnu mere atraktiv for mange. Den ultimative urbane foldekøremaskine for legesyge piger og drenge."

Read the full article online here.

AutoChunk.com
February 18, 2013

"Possibly the world’s fastest folding bike that you can fold in 10 seconds, Tern Eclipse X20 is fast and light enough to outdo its rival on road."

Read the full article online here. 

GBlog.com
February 15, 2013

"Lovingly called the Pirate-Ninja because they couldn’t decide which of the two was more badass, the Tern Eclipse X20 is quite possibly the world’s fastest folding bicycle. It’s a super light and super sleek 24 bike that is built for speed."

Read the full article online here.

 

Headset Press
November 15, 2012

"The Eclipse P7i is easily a very good contender for a practical bike. We at Headset Press really like the look of Tern’s, coming in good colours and generally well styled (not common for folding bikes!). They pay a lot of attention to the aesthetic of their bikes and it really shows. So if you’re in the market for a folder or solid commuter bike look no further than Tern."

Read the entire article online here.

Folding Bikes
October 16, 2012

"Overall, the Tern Eclipse P9 folding bicycle rides like a dream on the street, with the 24” wheels rolling over the bumps and crevices with ease. With its range of gears you’ll be able to ride up bridges and hills during your commute, or carry some groceries home from the store. At the end of your ride, fold up the bike and stow it away. The Tern Eclipse is a great blend of comfort and portability."

Read the full article online here.