2021 YT Industries

JEFFSY Pro Race 29

A 29″ carbon frame full suspension enduro bike with ultra high-end components.
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Manufacturer Price

$5,299
Weight28.7 lbs  
FrameCarbon
SuspensionFull, 150 / 150mm
ForkFox Factory Float 36
ShockFox Float DPX2 Factory
Wheels29″ Carbon
Drivetrain1 × 12
GroupsetX01 Eagle
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
JEFFSY Pro Race 29
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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)

28 mph

JEFFSY Pro Race 29

26 mph

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Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

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Reviews
off.road.cc
YT Industries Jeffsy 29 Core 3 review

Aug 2022

The YT Jeffsy 29 Core 3 is a very capable all-mountain bike which can handle the rough stuff but is equally at home on flow trails and jumps. While the specification list is solid for the money, it's worth paying extra attention to frame sizing and geometry to get the ride you want. With a longer dropper and some tougher tyres this bike has what it takes to be a real challenger when it comes to the best mountain bikes.

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Bike Perfect
YT Jeffsy Uncaged 6 review – the all-mountain ripper meets Flight Attendant tech

Aug 2022 · Richard Owen

Like Robocop or the Six Million Dollar Man, YT have rebuilt the Jeffsy with top notch tech to be (even) better than it was before

Highs
  • Superbly capable

  • Wants to blast every trail

  • Packed with top tech

  • Instant freehub engagement

  • App driven suspension setup

Lows
  • A hefty investment

  • Slightly conservative geometry

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Pinkbike
YT Drops New Jeffsy Uncaged 8 Build

Apr 2022 · Matt Beer

Following the recent release of YT's Capra and Decoy MX Uncaged 9 builds is the trail-friendly 150mm Jeffsy Uncaged 8.

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Beta
The Beta Tests: YT Jeffsy Core 2 29

Dec 2021 · Lydia Tanner

A great value with an appetite for rowdier trails. . 

Highs
  • Incredibly capable

  • Incredibly fun

  • Incredibly versatile

  • Incredible value

Lows
  • Pedal bob had us using the lockout on long climbs

  • Slightly limited water bottle space

  • Could use stronger brakes

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Loam Wolf
Review: YT Jeffsy 29 Core 4

Oct 2021 · Robert Johnston

The YT Jeffsy 29 Core 4 is a versatile all mountain bike that’ll happily crunch out mellower miles or tackle some tough enduro tracks.

Highs
  • Well-Rounded nature

  • Capable suspension package

  • Technical climbing prowess

Lows
  • Steeper head angle in steep terrain

  • Flimsy tires

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Mountain Bike Action
BIKE REVIEW: YT JEFFSY ALL-MOUNTAIN MACHINE - Mountain Bike Action Magazine

Aug 2021 · McCoy

The Jeffsy hits the mark for a rider who wants to go a step beyond...

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Vital MTB
2021 YT Jeffsy Core 3 29 Bike

Jul 2021 · Loganbrown

Not your typical Vital bike test...

Highs
  • All fun, all the time

  • Capable climber

  • Excellent parts spec

  • Encourages aggressive riding

  • Confident descender for both rocks and jumps

  • A true all-rounder

Lows
  • Frame protection quickly peels

  • Seemingly forever sold-out (even before the bike boom)

Read Review

Outdoor Gear Lab
YT Jeffsy Core 3

Jun 2021 · Jeremy Benson

The Jeffsy Core 3 is the latest version of YT's popular longer travel trail bike. While other brands have gone to extremes with their geometry, this bike's...

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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

JEFFSY Carbon 29" high modular carbonfiber frame | V4L Virtual 4-Link rear suspension | 148x12 mm DT Swiss QR Thru axle | down tube/seat stay/chain stay protection

Fork

FOX 36 Float Factory 29" | 150 mm | Grip 2 | 15QR x 110 | 44 mm Rake

Travel150mm

Spring TypeAir

Shock

FOX Float DPX2 Factory 210 x 55 mm | 3 pos- Adjust

Travel150mm

Spring TypeAir

Headset

Acros AZX-576 High Cap

Stem

Renthal Apex 35 50MM Width | 35MM Clamp | 0 Rise

Handlebar

Renthal Fatbar Carbon 35 Black | 30 mm Rise | 780 mm Width

Saddle

SDG RDR MNT YT Custom

Seatpost

FOX Transfer Factory 31.6 mm | S - M 125 mm drop / L 150 mm drop / XL - XXL 175 mm 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 V 2.1 Lock- On

Groupset
Rear Derailleur

SRAM X01 Eagle 12- Speed

Crank

SRAM X01 Eagle 175 mm | 32 T | DUB

Shifters

SRAM X01 Eagle 12- Speed

Cassette

SRAM XG1295 Eagle 10- 50 T | 12- Speed

Chain Guide

E13 TRS Race SL I05 2 Bolt | 28- 36 T | Compact Slider

Brakes

SRAM Code RSC Rotor Centerline 200 mm / 180 mm

TypeHydraulic Disc

Wheels
Rims

E13 TRS Race Carbon 29" x 27 mm | 110 x 15 mm | 148 x 12 mm

Tires

Front: MAXXIS Minion DHR II 3C MaxxGrip 29" x 2.4 | EXO | TR, Rear: MAXXIS Minion DHR II 3C MaxxGrip 29" x 2.4 | EXO | TR

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Last updated February 5
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