Archive: Jeht Gen1
Years of production: 2020-2023
Succeeded by the Jeht Gen2. See the current Jeht.
The first generation Jeht was our genre-defying, do-everything 140mm 29er steel full suspension bike. A quiver killer and the Swiss army knife of the droplink range: if you needed one bike to do all your mountain biking, this was it. 140mm of rear travel paired with a 150mm fork on trail-taming 29" wheels gave a bike with a spring in its step that always had your back.
It spliced the accurate handling of the FlareMAX with a solid dose of RocketMAX speed. The bespoke Reynolds 853 mainframe with Longshot geometry was just as happy zipping round a trail centre as swishing along alpine singletrack or over Lake District passes. Riders could also run it as a mullet, with a 27.5" rear wheel, for a lower BB, more standover and a more playful ride.
Finishes: UK-made Launch Edition in Afterburner and Matte Teal; Taiwan-made production frames in Nimbus and Midnight Blue; and a final one-off run in Dark Crystal Malt.
Sizes: Small, Medium, Large and XL. Wheels: 29", or 29" front / 27.5" rear mullet. Rear travel: 140mm.
Longshot geometry, steel and droplink
Longshot geometry keeps the bike stable through the rough stuff, planted in the corners and pinpoint accurate in the steep tech. Couple a super short 35mm stem to the optimised head angle and the bike pushes you on, looking for every stump to boost off, rock to gap and berm to rail, with incredible poise and composure.
Reynolds 853 builds a light, lively and robust front end, with our ride-tuned Ovalform top tube and our exclusive HD down tube. The steel construction is compliant and ground-moulding, extracting grip and feedback from the trail. 29" wheels roll easily and give stability, confidence and speed in rough terrain; the mullet option trades a little rolling speed for manoeuvrability and can suit shorter riders. Cotic droplink suspension is supportive and progressive, keeping the 140mm of travel lively and interactive, with grip on the descents and support and traction on the climbs.
Frame details
- Longshot geometry designed for super short 35mm stems
- Reynolds 853 Ovalform and Cotic exclusive HD down tube front end
- 44mm head tube with external bottom cup for taper steerers and zero stack top cup
- Custom Cotic 35mm Reynolds 853 seat tube for stiff support of the main suspension pivots
- 31.6mm seatpost, internal stealth dropper routing
- Integrated top guide on a threaded bottom bracket, plus ISCG05 lower tabs
- Rear mech cable routed internally through the steel seatstay
- Custom forged swingarm heads for stiffness and tyre clearance
- 6066-T6 aluminium swingarm with Syntace X-12 Boost 148 x 12mm rear axle
- 15mm BB pivots and a thru-axle-style droplink linkage clamp
- One bottle mount
- Tyre clearance: 29 x 2.5", or 27.5 x 2.8" rear as a mullet
- Optimised around 150mm forks
- 140mm droplink rear travel
Geometry
Cotic size guide
| Frame size | Rider height (cm) | Rider height (ft/in) |
|---|---|---|
| Small | 160-170cm | 5ft 3in - 5ft 8in |
| Medium | 169-180cm | 5ft 7in - 5ft 11in |
| Large | 178-188cm | 5ft 10in - 6ft 2in |
| XL | 186-195cm | 6ft 0in - 6ft 5in |
Longshot geometry means low, long frames with plenty of standover. We recommend the size for your height with a short 30-35mm stem. If you upsize, check your dropper will fit: the collar can hit the seat tube top, or the post can bottom out on the droplink pivot. We don't develop our bikes around a specific fork offset, as it comes down to rider preference. Email size@cotic.co.uk for help.
150mm travel forks, 29er
| Frame size | Small | Medium | Large | XL |
|---|---|---|---|---|
| Seat tube (centre-top) | 390mm | 425mm | 460mm | 495mm |
| Top tube (effective) | 595mm | 621mm | 647mm | 674mm |
| Head angle | 64.5° | 64.5° | 64.5° | 64.5° |
| Seat angle (720mm saddle height) | 75.8° | 75.8° | 75.8° | 75.8° |
| Seat angle (815mm saddle height) | 75.5° | 75.5° | 75.5° | 75.5° |
| Chainstay length | 447mm | 447mm | 447mm | 447mm |
| BB drop | -27mm | -27mm | -27mm | -27mm |
| Head tube length | 100mm | 110mm | 120mm | 130mm |
| Reach | 444mm | 467mm | 490mm | 515mm |
| Stack | 616mm | 625mm | 634mm | 643mm |
| Wheelbase | 1229mm | 1256mm | 1283mm | 1313mm |
| Usual height range | 160-170cm | 169-180cm | 178-188cm | 186-195cm |
| Stem length | 30-45mm | 30-45mm | 30-45mm | 30-45mm |
| Frame wheel travel | 140mm | 140mm | 140mm | 140mm |
| Wheel size | 29" | 29" | 29" | 29" |
| Maximum rear tyre size | 29 x 2.5" | 29 x 2.5" | 29 x 2.5" | 29 x 2.5" |
| Maximum seatpost insertion (incl. actuator) | 178mm | 213mm | 248mm | 283mm |
All measurements static, based on a 150mm travel fork (563mm axle to crown). Maximum seatpost insertion leaves 25mm clear below the actuator for hose or cable routing; an externally routed dropper won’t need this margin.
150mm travel forks, 27.5" rear wheel (mullet)
| Frame size | Small | Medium | Large | XL |
|---|---|---|---|---|
| Seat tube (centre-top) | 390mm | 425mm | 460mm | 495mm |
| Top tube (effective) | 599mm | 625mm | 651mm | 678mm |
| Head angle | 64.6° | 64.6° | 64.6° | 64.6° |
| Seat angle (720mm saddle height) | 75.3° | 75.3° | 75.3° | 75.3° |
| Seat angle (815mm saddle height) | 75.0° | 75.0° | 75.0° | 75.0° |
| Chainstay length | 447mm | 447mm | 447mm | 447mm |
| BB drop | -31mm (from 29" front) | -31mm (from 29" front) | -31mm (from 29" front) | -31mm (from 29" front) |
| Head tube length | 100mm | 110mm | 120mm | 130mm |
| Reach | 437mm | 460mm | 483mm | 508mm |
| Stack | 624mm | 633mm | 642mm | 651mm |
| Wheelbase | 1219mm | 1246mm | 1274mm | 1303mm |
| Usual height range | 160-170cm | 169-180cm | 178-188cm | 186-195cm |
| Stem length | 30-45mm | 30-45mm | 30-45mm | 30-45mm |
| Frame wheel travel | 140mm | 140mm | 140mm | 140mm |
| Wheel size | 29" front / 27.5" rear | 29" front / 27.5" rear | 29" front / 27.5" rear | 29" front / 27.5" rear |
| Maximum rear tyre size | 27.5 x 2.8" | 27.5 x 2.8" | 27.5 x 2.8" | 27.5 x 2.8" |
| Maximum seatpost insertion (incl. actuator) | 178mm | 213mm | 248mm | 283mm |
Static, with a 150mm fork (563mm axle to crown) and a Works Components 1° angleset fitted to steepen the head angle.
140mm travel forks, 29er
| Frame size | Small | Medium | Large | XL |
|---|---|---|---|---|
| Seat tube (centre-top) | 390mm | 425mm | 460mm | 495mm |
| Top tube (effective) | 594mm | 620mm | 646mm | 673mm |
| Head angle | 64.9° | 64.9° | 64.9° | 64.9° |
| Seat angle (720mm saddle height) | 76.2° | 76.2° | 76.2° | 76.2° |
| Seat angle (815mm saddle height) | 75.9° | 75.9° | 75.9° | 75.9° |
| Chainstay length | 447mm | 447mm | 447mm | 447mm |
| BB drop | -30mm | -30mm | -30mm | -30mm |
| Head tube length | 100mm | 110mm | 120mm | 130mm |
| Reach | 448mm | 471mm | 494mm | 519mm |
| Stack | 612mm | 621mm | 630mm | 639mm |
| Wheelbase | 1224mm | 1252mm | 1280mm | 1308mm |
| Usual height range | 160-170cm | 169-180cm | 178-188cm | 186-195cm |
| Stem length | 30-45mm | 30-45mm | 30-45mm | 30-45mm |
| Frame wheel travel | 140mm | 140mm | 140mm | 140mm |
| Wheel size | 29" | 29" | 29" | 29" |
| Maximum rear tyre size | 29 x 2.5" | 29 x 2.5" | 29 x 2.5" | 29 x 2.5" |
| Maximum seatpost insertion (incl. actuator) | 178mm | 213mm | 248mm | 283mm |
All measurements static, based on a 140mm travel fork (553mm axle to crown).
140mm travel forks, 27.5" rear wheel (mullet)
| Frame size | Small | Medium | Large | XL |
|---|---|---|---|---|
| Seat tube (centre-top) | 390mm | 425mm | 460mm | 495mm |
| Top tube (effective) | 598mm | 624mm | 650mm | 677mm |
| Head angle | 65.0° | 65.0° | 65.0° | 65.0° |
| Seat angle (720mm saddle height) | 75.7° | 75.7° | 75.7° | 75.7° |
| Seat angle (815mm saddle height) | 75.4° | 75.4° | 75.4° | 75.4° |
| Chainstay length | 447mm | 447mm | 447mm | 447mm |
| BB drop | -34mm | -34mm | -34mm | -34mm |
| Head tube length | 100mm | 110mm | 120mm | 130mm |
| Reach | 441mm | 463mm | 487mm | 511mm |
| Stack | 620mm | 629mm | 638mm | 646mm |
| Wheelbase | 1215mm | 1242mm | 1269mm | 1299mm |
| Usual height range | 160-170cm | 169-180cm | 178-188cm | 186-195cm |
| Stem length | 30-45mm | 30-45mm | 30-45mm | 30-45mm |
| Frame wheel travel | 140mm | 140mm | 140mm | 140mm |
| Wheel size | 29" front / 27.5" rear | 29" front / 27.5" rear | 29" front / 27.5" rear | 29" front / 27.5" rear |
| Maximum rear tyre size | 27.5 x 2.8" | 27.5 x 2.8" | 27.5 x 2.8" | 27.5 x 2.8" |
| Maximum seatpost insertion (incl. actuator) | 178mm | 213mm | 248mm | 283mm |
Static, with a 140mm fork (553mm axle to crown) and a Works Components 1° angleset fitted to steepen the head angle.
Component sizes
- Seatpost diameter: 31.6mm (375mm long minimum)
- Front mech: not applicable, 1x drivetrains only
- Fork: maximum 150mm travel, 563mm axle to crown (without sag)
- Bottom bracket: 73mm width, conventional English/BSA thread
- Chainline: 52mm Shimano / 53mm Boost for up to 32t round or 30t oval chainring; 55mm Shimano for up to 36t round or 34t oval
- Chainguide mounting: ISCG05 bottom two tabs; integrated Cotic top guide included with frame or bike
- Headset: 44mm for taper steerer forks (Hope 2H, Cane Creek ZS44 top / EC44 bottom, Chris King InSet i7)
- Rear hub: Boost 148 x 12mm bolt-through
- Rear axle: Syntace X-12
- Rear mech hanger: Syntace X-12 Type 1 (conventional or Shimano direct mount)
- Shock: 210 x 55mm, air shock only
- Shock fittings: 20.0 x M8 down tube end, 24.0 x M8 seatstay end
- Dropper routing: stealth via the down tube
- Rear brake mount: IS, compatible with rotors up to 203mm
Setup guide
Cotic droplink suspension works best with 25-30% sag, and we prefer starting at 30%. With the 55mm stroke shock that means 15-16.5mm at the shock; we suggest starting around 15.5mm. For the fork, aim for 28-35mm sag on a 140mm fork (start around 32mm) or 30-37mm on a 150mm fork (start around 34mm).
To set shock sag, start with 170psi, turn off any lockout or climb switch, and put on your riding kit (including a full pack or bottles). With the saddle at full height, bounce on the saddle while riding, stop, slide the o-ring down to the seal, sit on the bike with your feet off the pedals, then get off carefully and measure. Adjust the air pressure to suit. For the fork, start a new fork at 60psi with compression at minimum, measure sag in a balanced standing position, then recheck the rear. Set up by sag, not by a generic pressure, because weight distribution differs between bikes.
Volume spacers: forks and shocks come set up for a rider of around 75kg. On the fork, add one spacer for every 10kg lighter than that, or remove one for every 10kg heavier (on a Cane Creek HELM, move the adjuster one step instead). Shocks are less sensitive to rider weight: add a spacer if you want more support, or remove one if you’re heavier and not using all the travel. There’s also a full sag setup video on YouTube.
Cane Creek DB Air IL (as delivered, counted from fully open): 2 large volume spacers, HSC 1.0 turns, LSC 6 clicks, HSR 1.0 turns, LSR 4 clicks
Cane Creek Kitsuma (as delivered, counted from fully open): 1.6 large volume spacers, HSC 0.75 turns, LSC 3 clicks, HSR 0.5 turns, LSR 1 click
Our base settings run on the lively, fast-rebound side, so you’ll probably need to run your fork a little faster than before to balance the feel. Give them a couple of rides before changing anything. For other shocks, start with rebound 3 clicks from open and compression or platform switched off, as droplink doesn't need a compression circuit to pedal well. On the fork, start with high-speed compression fully open and low-speed in the middle of its range, and add a volume reducer rather than more damping if you're using full travel too easily. Don't set rebound by bouncing the bike in the street; adjust on the trail, change one thing at a time, and keep notes of a base setup you can go back to.
Download the droplink owner's manual (PDF)
Origin
Designed, developed, engineered and tested by us in the Peak District, with Cy Turner as lead designer and engineer, ride tested by everyone at Cotic and our race team, and lab tested beyond ISO 4210.
Launch Edition frames, in Afterburner and Matte Teal, were made in the UK.
Production frames were hand made in Taiwan by our selected framebuilder, zinc phosphate dip-coated inside and out before painting, finished with a protective clear coat, and QC'd in Taiwan and again in the UK. A final one-off run of Taiwan-made frames in Dark Crystal Malt closed out the generation, after which all our droplink bikes moved to UK-made front triangles. Complete bikes were always built to order in the Peak District.
Reviews
Bike Perfect (4.5 stars, Gold XT build): said the Jeht felt right from the first ride, with dialled geometry for speed and control and well-sorted kit and suspension. Read the Bike Perfect review.
Singletracks.com (Gold Eagle build): found it climbed as well as a carbon bike of the same weight, with notably supple initial suspension, and was surprised how much fun a long-chainstay steel 29er was to throw around. Read the Singletracks review.
BikeRadar (4 stars, Silver Mullet build, Trail Bike of the Year 2023): praised the geometry for steep tech, the spec options and the smooth suspension, and said it almost made the top three in the test. Read the BikeRadar review.
Photo gallery
