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2019 YT Industries

JEFFSY 29 CF Comp

A 29″ carbon frame full suspension trail bike with upper mid-range components.
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Manufacturer Price

$3,499
Weight29.5 lbs  
FrameCarbon
SuspensionFull, 140 / 140mm
ForkFox Performance Elite Float 34
ShockFox Float DPS Performance Elite
Wheels29″ Aluminum
Drivetrain1 × 11
GroupsetXT, e*thirteen TRS
BrakesSRAM Guide R Hydraulic Disc
SeatpostDropper
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
JEFFSY 29 CF Comp
Other Trail bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

31 mph

JEFFSY 29 CF Comp

26 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The YT Industries Jeffsy is a highly capable trail bike, praised for its aggressive design, improved geometry, and excellent value. It offers a smooth, efficient ride with a suspension that handles both small bumps and larger impacts well. The bike is noted for its stability at speed and agility, making it a favorite among aggressive riders. However, some reviews mention issues with component choices like harsh-feeling wheels and underpowered brakes in steep terrain.

Pros
  • Aggressive design aimed at serving aggressive riders

  • Improved geometry for better handling

  • Excellent value for money

  • Smooth and efficient suspension performance

  • Stable at speed yet agile

Cons
  • Harsh-feeling wheels and tires

  • Underpowered brakes in steep terrain

  • Some components require adjustment

Key Quotes
From end to end, YT’s entire lineup is aimed primarily at serving aggressive riders.
BIKE Magazine logoBIKE Magazine
The Jeffsy’s updates make it hugely capable on a wide range of trails
BikeRadar logoBikeRadar
Bang Boom Bang – the JEFFSY likes it rough!
Enduro Mountainbike Magazine logoEnduro Mountainbike Magazine
This is not an enduro bike! It's a very capable trail bike.
NSMB logoNSMB
The highly revamped 2019 YT Jeffsy is now hitting consumers’ hands and receiving rave reviews with new owners.
MTBR logoMTBR

Feedback?

View all reviews

Vital MTB
2020 YT Jeffsy Base 29 Bike

Sep 2020 · Sspomer

If you can get it, GET IT.

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NSMB
REVIEW: YT Jeffsy CF Pro Race 29

Jun 2020

YT's bruiser of a trail bike blurs enduro lines

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MBR
YT Jeffsy 29 CF Comp review - MBR

Apr 2020 · Paul Burwell

Back to defend its Trail Bike crown is the YT Jeffsy 29 CF Comp 29. Revamped last year: a new carbon frame, adjustable geometry, top-quality spec.

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Enduro Mountainbike Magazine
The battle: YT Jeffsy CF PRO RACE 29 vs. YT Capra CF PRO RACE 29

May 2019 · Trev Worsey

With category blurring potential, the new 150 mm travel YT Jeffsy CF PRO RACE 29 is ready to battle way beyond its pay grade, but how does it compare against its big brother the YT Capra CF PRO RACE 29? We tested them both against the clock and on the trails to find out. The […]

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BIKE Magazine
Tested: YT Jeffsy 29 CF Pro Race

May 2019

What happens when you add longer travel, burlier suspension and fancier parts to an already-fancy, burly long-travel trail bike? The YT Jeffsy 29 CF Pro Race.

Read Review

BikeRadar
Jeffsy 29 CF Pro review

May 2019 · Tom Marvin

Capable and confident, the Jeffsy retains its place as a great all-rounder

Highs
  • Better pedalling performance, improved geometry, decent kit

Lows
  • Tyres split opinion, rattly bottle, less ‘fun’ than the previous generation

Read Review

MTB Mag
[First Ride] New YT Jeffsy 29 MKII

Jan 2019 · Hector Saura

At the beginning of last December I was in the Portuguese region of Algarve, a location that thanks to the WeRide.pt guys is becoming increasingly popular for the practice of mountain biking, especially in winter, since the good weather It allows you to ride without worrying about whether it is cold or bad weather. The reason why I traveled to the south of Portugal was the presentation of the new and updated Jeffsy, the Aggressive Trail bike from YT Industries. News Kinematics with increased anti-squat Geometry with ergonomics that offers better performance in pedaling and driving sensation Bearing and axle system with one-sided access

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Singletrack World
YT Jeffsy CF 29 Pro Race 2019 - First Ride Review

Jan 2019 · Hannah Dobson

It’s the first few minutes of a bike launch and I’m having to try quite hard not to weep. The scepticism brought about by predictably dramatic music, followed by an...

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Geometry
Specs
Build
Frame

JEFFSY Carbon 29" high modular carbonfiber main frame with aluminium rear triangle | V4L Virtual 4-Link rear suspension | 148x12mm DT Swiss QR Thru axle | down tube/seat stay/chain stay protection

BB StandardBB86/BB92, Press Fit

Fork

FOX 34 Float Performance Elite 29“ | Fit 4 | 140mm | 44mm Rake

Travel140mm

Spring TypeAir

Shock

FOX Float DPS Performance Elite 3pos-Adj. | 210X50mm

Travel140mm

Bottom Bracket

e*thirteen BB92 24mm

Headset

Acros AZX-203 High Cap

Stem

Renthal Apex 35 35 mm Clamp | 40mm

Handlebar

Renthal Fatbar 35 30mm Rise | 800mm

Saddle

SDG FLY MTN Cutout YT Custom | Orange | Grey

Seatpost

e*thirteen TRS Plus 31.6mm | S 125mm Drop | M - XL 150mm Drop | XXL 170mm Drop

TypeDropper

Pedals

included / inklusive The included pedals were not made for demanding trails or racing. That is why we also offer you quality pedals at an attractive price in the shopping cart.

Grips

ODI Elite Motion V2.1 | Lock On

Groupset
Rear Derailleur

Shimano Deore XT Shadow Plus | 11-Speed

Crank

e*thirteen TRS 175mm | 32T BOOST

Shifters

Shimano Deore XT 11-Speed

Cassette

e*thirteen TRS Plus 9-46T | 11-Speed

Chain

Shimano CN-HG601-11

Chain Guide

None included

Brakes

SRAM Guide R ROTOR CENTERLINE | 200mm / 180mm

TypeSRAM Guide R Hydraulic Disc

Brake Levers

SRAM Guide R

Wheels
Rims

e*thirteen TRS 29“ x 27mm | 110x15mm | 148x12mm

Spokes

e*thirteen TRS wheelset

Front Hub

e*thirteen TRS wheelset, 15mm x 110mm front, 12mm x 148mm rear

Rear Hub

e*thirteen TRS wheelset, 15mm x 110mm front, 12mm x 148mm rear

Tires

Front: e*thirteen TRS Plus 29" | 2.35, Rear: e*thirteen TRS Plus 29" | 2.35

Rider Notes
Riders Also Viewed

First added March 17

Last updated August 20

Not listed for 2,474 days