YT Industries Jeffsy 29 CF Pro

Name: YT Industries Jeffsy 29 CF Pro
Brand: YT Industries

2019 MountainTrail Manufacturer page

Last known price: $3,999

Prices shown first for United States
Travel: 140 / 140 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–50t
Gear range: 500%
Weight: 13 kg 28.7 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

21 of 24 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

JEFFSY CARBON 29" high modular carbonfiber frame, V4L Virtual 4-Link rear suspension, 148x12mm DT Swiss QR Thru axle, down tube/seat stay/chain stay protection Not identified

Suspension

2 parts

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

7 parts

Grips
- ODI
Handlebar
- Race Face Turbine
Headset
- Acros
AZX-203
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. Not identified
Saddle
- SDG
Seatpost
- e*thirteen
Stem
- Race Face Turbine R 35

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size LG

Table

Reach 474mm

Stack 624mm

Wheelbase 1215mm

Head angle 66.5°

Seat angle 77.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	434	454	474	494	514
Stackmm	615	620	624	633	638
Top tube lengthmm	571	592	614	637	659
Seat tube lengthmm	400	415	435	460	485
Head tube lengthmm	100	105	110	120	125
Head tube angle	66.5°	66.5°	66.5°	66.5°	66.5°
Seat tube angle	77.5°	77.5°	77.5°	77.5°	77.5°
Chainstay lengthmm	435	435	435	440	440
Wheelbasemm	1171	1193	1215	1244	1266
Front centermm	737	759	781	805	827
Bottom bracket dropmm	27	27	27	27	27
Bottom bracket heightmm	349	349	349	349	349
Fork rakemm	43	43	43	43	43
Trailmm	116	116	116	116	116
Stack/reach ratio	1.42	1.37	1.32	1.28	1.24

Not published by the manufacturer: Standover height, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Bicycle weight: 13 kg

28.7 lb

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 50
Lowest gear: 19.7 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.35″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 986 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

19.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Highest gear

98.6 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Shifting

Mechanical

34 of 1,020 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2019
Sample: 1,020 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.6 km/h
Highest gear: 37.8 km/h

Total gear range 500%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 19.7–98.6 gear inches
Class reference (p10–p90): 16.5–92.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2019
Lowest gear: 968 bicycles with this information, 94.9% of the class
Highest gear: 968 bicycles with this information, 94.9% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2019 builds
Specification	This bicycle YT Industries Jeffsy 29 CF Pro	YT Industries Jeffsy 27 AL Base	YT Industries Jeffsy 27 CF Comp	YT Industries Jeffsy 27 CF Pro	YT Industries Jeffsy 27 CF Pro Race	YT Industries Jeffsy 29 AL Base
Frame
Frame material	Carbon	Aluminum	Carbon	Carbon	Carbon	Aluminum
Bicycle weight	13 kg	13.8 kg	13.3 kg	12.9 kg	12.7 kg	13.9 kg
Suspension
Front travel	140 mm	150 mm	150 mm	150 mm	160 mm	140 mm
Drivetrain
Smallest chainring	34	34	32	34	32	34
Largest chainring	34	34	32	34	32	34
Rear sprockets	12	12	11	12	11	12
Smallest sprocket	10	11	9	10	9	11
Largest sprocket	50	50	46	50	46	50
Lowest gear	19.7 in	18.7 in	19.1 in	18.7 in	19.1 in	19.7 in
Highest gear	98.6 in	85.0 in	97.8 in	93.5 in	97.8 in	89.6 in
Other specifications
Tire width	2.35″	2.4″	2.35″	2.35″	2.35″	2.4″
Rear travel	140 mm	150 mm	150 mm	150 mm	160 mm	140 mm
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Wheel size	29″	27.5″	27.5″	27.5″	27.5″	29″
Fork spring	Not informed	Air	Air	Not informed	Air	Air
Bottom bracket standard	Not informed	Not informed	BB86/BB92	Not informed	BB86/BB92	Not informed

Changes since 2018
Specification	2018 YT Industries Jeffsy 29 CF Pro	This bicycle YT Industries Jeffsy 29 CF Pro
Frame
Bicycle weight	12.81 kg	13 kg
Drivetrain
Smallest chainring	32	34
Largest chainring	32	34
Rear sprockets	11	12
Smallest sprocket	9	10
Largest sprocket	46	50
Lowest gear	20.2 in	19.7 in
Highest gear	103.1 in	98.6 in
Other specifications
Bottom bracket standard	BB86/BB92	Not informed
Fork spring	Air	Not informed