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2019 YT Industries

JEFFSY 27 CF Comp

A 27.5″ carbon frame full suspension enduro bike with high-end components.
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Manufacturer Price

$3,499
Weight29.3 lbs  
FrameCarbon
SuspensionFull, 150 / 150mm
ForkFox Performance Elite Float 34
ShockFox Float DPS Performance Elite
Wheels27.5″ 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 27 CF Comp
Other Enduro 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)

29 mph

JEFFSY 27 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?

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Vital MTB
2020 YT Jeffsy Base 29 Bike

Sep 2020 · Sspomer

If you can get it, GET IT.

Read Review

NSMB
REVIEW: YT Jeffsy CF Pro Race 29

Jun 2020

YT's bruiser of a trail bike blurs enduro lines

Read Review

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.

Read Review

BIKE Magazine
Bible Review: YT Jeffsy 27.5 CF Pro

Jan 2020

The YT Jeffsy is like the bike equivalent of twin-tip skis, inviting lots of rider input and encouraging you to play with the terrain.

Read Review

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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BikeRadar
YT Jeffsy CF Pro 27 first ride review

Jan 2018 · Rob Weaver

Instead, the Jeffsy 27 offers some impressive all-round credentials and is as happy being razzed about in your local woods as it is clocking up the trail miles, though the bigger-wheeled version does feel like it carries speed a touch better.. .

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Loam Wolf
Review: YT Jeffsy CF Pro 27.5

Dec 2017 · Drew Barber

Priced right and packing good looks, the YT Jeffsy is a tempting buy. But how does the Jeffsy star up on the trail or against its 29" brother?

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Enduro Mountainbike Magazine
YT JEFFSY 27 CF Pro Race Review

Nov 2017 · Christoph Bayer

JEFFSY 27 or CAPRA? For our enduro bike comparison, YT sent us the YT JEFFSY 27 CF Pro Race. Does this bike live up to its name? [...]

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Geometry
Specs
Build
Frame

JEFFSY Carbon 27" 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 150mm | Fit 4 | 15QRx110 | 44mm Rake

Travel150mm

Spring TypeAir

Shock

FOX Float DPS Performance Elite 3pos-Adj. | Evol LV | 230X60mm

Travel150mm

Bottom Bracket

e*thirteen BB92 24mm

Headset

Acros AZX-203 High Cap

Stem

Renthal Apex 35 50mm

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 XT Shadow Plus | 11-Speed

Crank

e*thirteen TRS 175mm | 32T BOOST

Shifters

Shimano XT 11-Speed

Cassette

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

Chain

SRAM GX Eagle

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 27,5“ x 27mm | 110x15 mm | 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 27,5" | 2.35, Rear: e*thirteen TRS Plus 27,5" | 2.35

Rider Notes
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First added March 17

Last updated August 20

Not listed for 2,483 days