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Overview
CORE 5
CORE 4
CORE 3
CORE 2
CORE 1
UNCAGED 13
UNCAGED 14
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If you're seeking a versatile rig to let loose on winding singletrack, look no further: with JEFFSY CORE 3, you've found your sidekick. Durable, balanced, and fun as hell, it's packed with high-quality, low-maintenance components that land it in the sweet spot for flat-out trail riding. Underneath the paint, you'll find our High-Modulus carbon fiber for precise control over every line and turn, and with YT STASH downtube storage, you can ditch the backpack and free your rides. FOX Performance and DT Swiss wheels round off the package, offering the doubt-slaying confidence you need to tear up your favorite trails.
Hide your loot on all Carbon frames
Putting the rider in focus
Never go thirsty again!
inch
cm
153cm-166cm
162cm-176cm
172cm-185cm
181cm-194cm
190cm-203cm
Pale Green
Black Magic
This bike has the earliest arrival
All Available Options
Fixed debit interest rate of 4.9 (annual) applies only to the selected term from Conclusion of the contract (Fixed-interest period); You have to do monthly installments in the amount you choose. If you do not redeem your installment plan within the fixed-interest period, the conditions for subsequent disposals apply.
For other and future dispositions (subsequent dispositions) the variable debit interest rate (annually) is 17.43% (if you already have a line of credit with us, the actual variable interest rate may differ). For subsequent orders, you must make monthly installments in the amount you have chosen, but at least chosen by you, but at least 2.5% of the highest debit balance rounded to a full €100 of the subsequent orders (min. €9). Payments for follow-up orders will only be credited to interest-bearing In the event of different interest rates, the higher interest rate will be credited first.
Included:
YT Bike Box
Costs nothing, helps a lot – the toolbox contains everything you need to assemble your bike.
You can select financing as one of the payment method options. After completing the ordering process, you will be automatically redirected to the website of our financing partner, Consors Finanz BNP Paribas. The effective annual interest rate is 4.9 % in Germany and 5.9 % in Austria with terms available between 6 and 72 months. Please note that financing is currently only possible for customers in Germany and Austria.
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Together with Jobrad, we offer companies and employees the opportunity to lease bikes. Since bicycles are treated like company cars for tax purposes, both sides benefit from the JobRad concept.
With Bikeleasing, your employer is the leaser and pays the monthly instalments. In return, you receive part of your wages/salary as a benefit in the form of a bicycle. Leasing is significantly cheaper than buying directly - save up to 40% off the RRP!
Just leave us your e-mail address and we'll let you know as soon as Jeffsy 29 CORE 3 is back in stock.
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Our High-Modulus carbon crushes it on the trail, offering immense strength, lightweight performance, and an improved ride feel.
1/1
Gone are the days of taping a tube to your frame: Beneath the double-sealed, weatherproof lid lies two water-resistant neoprene bags to keep your payload silent, while a separation wall prevents your goods from getting lost within the frame. Sidewall bonding keeps the cables extra tidy, and for total security, we separated the bottle cage from the lid to prevent unwanted movement.
Tools, check. Spare tube? Check. Why let a mechanical end your ride; use the toptube mounts to ditch the backpack to store your essentials.
For optimal protection and sleek lines, cables are routed almost entirely through the frame. This bike is a mechanic's dream: Uninterrupted internal tubes provide easy, intuitive cable replacement and eliminate noise for stealthy slap-free riding.
This frame is compatible with the SRAM UDH hanger, meaning it can pair with a wide range of drivetrain options, including SRAM Full Mount Transmission rear derailleurs. Sent it too hard? No sweat – these hangers are easily available worldwide.
Stashed neatly into the rear axle, this custom, removable HEX6 tool is always on hand to save the day. The design allows for effortless wheel removal, helping to put you back on track in no time, and is engineered with ergonomics in mind to ensure generous hand clearance. Whether stuck on the trail with a puncture or cramming multiple bikes in the car for a road trip, this tool has you sorted.
Included with JEFFSY is our Thirstmaster 6000 bottle and cage combo. As our go-to solution for rider hydration, this BPA-free bottle has a 620ml capacity to quench even the driest thirst, and the side-load cage is simple to use, even on the move.
The JEFFSY features Rider Centered Geometry, so you can push harder on the trail in total confidence. A roomy reach measurement, slack head angle, proportional seatstay measurements, and a steep, 77-degree effective seat tube work in sync to create a balanced and precise bike. JEFFSY keeps you, the rider, as the focus – It’s your best friend, after all.
Situated at the lower shock mount, the Flip Chip makes it quick and easy to adjust the geometry according to your ride style. This chip is set to low by default but increases the BB height by 8mm and ST/HT angle by 0.6 degrees in the high position. It's your call: Choose high for enhanced agility, precision, and climbing efficiency or low for trail-ripping confidence and a lower center of gravity.
Our V4L suspension technology is award-winning and has seen more than a few podiums in its time. Sensitive off the top, the design provides claw-like traction on loose terrain while remaining supportive through the mid-stroke. The end-stroke ramps up to prevent bottom-out, even on monster jumps, and did we mention the pop? Load up that linkage and let it fly.
Proportional seatstay lengths ensure JEFFSY is perfectly balanced. By keeping the front and rear center in check, the ride character is fast, confident, and predictable, for total control when things get hectic.
Depending on your weapon of choice, your JEFFSY will feature either a carbon or hand-crafted aluminum frameset. Our carbon fiber frames come in two options: High Modulus and Ultra Modulus. Both materials are equally durable and built for rowdy riding, with Ultra Modulus being the lighter choice.
Extensive chainstay and seatstay protection guards the frame from chain slap, while the knobs reduce chain slap noise. All you’ll hear is the adrenaline rushing through your veins and your tires rolling over the trail.
In addition to the double-sealed industrial bearings used, all pivot points are equipped with an additional seal to keep water and dirt at bay, protecting the bearings and extending their service life.
Increased heel clearance to reduce friction caused by the shoes rubbing on the frame while riding.
Silence is the sound of speed. More than just robust protection, the extensive frame guards eliminate unwanted noise, keeping you focused on the trail ahead as you descend like a ninja. JEFFSY even goes a step further: Beneath the bolt-on downtube protector lies sound-deadening foam to keep you cruising through those "Oh sh*t" moments without fear.
Flip Chip Position
low
high
s
m
l
xl
xxl
Jeffsy 29 Core Range Manual - MY2024
PDF | 7.88 MB
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Now in its third iteration, JEFFSY rewrites the rulebook for trail bike performance. No half measures; only Trail Excellence.
29
MX
Not sure if this is the perfect fit? Go ahead and browse more models!
Uphill
Downhill
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