YT Industries Jeffsy Core 4 29

Name: YT Industries Jeffsy Core 4 29
Brand: YT Industries

2023 MountainEnduro Manufacturer page

YT Industries Jeffsy Core 4 29, color Black Magic

Last known price: $4,999

Prices shown first for United States
Travel: 150 / 150 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Weight: 14.32 kg 31.6 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 154–166
MD 163–176
LG 173–185
XL 182–194
XXL 191–202

Components

15 of 15 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.

Suspension

2 parts

Drivetrain

4 parts

Brakes

1 part

Brakes
- SRAM G2 RSC

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Reach 470mm

Stack 627mm

Wheelbase 1218mm

Head angle 66.0°

Seat angle 77.0°

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 Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	430	450	470	490	510
Stackmm	618	622	627	636	640
Top tube lengthmm	572	593	615	638	660
Seat tube lengthmm	400	415	435	460	485
Head tube lengthmm	100	105	110	120	125
Head tube angle	66°	66°	66°	66°	66°
Seat tube angle	77°	77°	77°	77°	77°
Chainstay lengthmm	435	435	435	440	440
Wheelbasemm	1174	1196	1218	1247	1269
Front centermm	740	762	784	808	830
Bottom bracket dropmm	24	24	24	24	24
Bottom bracket heightmm	352	352	352	352	352
Standover heightmm	706	702	701	693	694
Fork rakemm	41	41	41	41	41
Trailmm	122	122	122	122	122
Stack/reach ratio	1.44	1.38	1.33	1.30	1.26

Not published by the manufacturer: 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: 14.32 kg

31.6 lb

Suspension

Suspension configuration: Full suspension
Front travel: 150 mm
Rear travel: 150 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 17.9 in
Highest gear: 92.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

5 measures

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

Front travel

150 mm

This value is below the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,826 bicycles with this information
Coverage: 98.4% of the class

Rear travel

150 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,567 bicycles with this information
Coverage: 84.5% of the class

Lowest gear

17.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,313 bicycles with this information
Coverage: 70.8% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,313 bicycles with this information
Coverage: 70.8% of the class

Shifting

Mechanical

365 of 1,854 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,854 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 35.5 km/h

Total gear range 520%

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: 17.9–92.8 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2023
Lowest gear: 1313 bicycles with this information, 70.8% of the class
Highest gear: 1313 bicycles with this information, 70.8% 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 2023 builds
Specification	This bicycle YT Industries Jeffsy Core 4 29	YT Industries Jeffsy Core 2 27	YT Industries Jeffsy Core 2 29	YT Industries Jeffsy Core 3 29	YT Industries Jeffsy Primus 24	YT Industries Jeffsy Primus 26
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Aluminum	Aluminum
Bicycle weight	14.32 kg	15.3 kg	15.3 kg	14.7 kg	12.6 kg	14 kg
Suspension
Front travel	150 mm	150 mm	150 mm	150 mm	130 mm	140 mm
Drivetrain
Smallest chainring	32	32	32	32	30	30
Largest chainring	32	32	32	32	30	30
Rear sprockets	12	12	12	12	11	12
Smallest sprocket	10	11	11	10	11	11
Largest sprocket	52	50	50	52	42	50
Lowest gear	17.9 in	17.6 in	18.6 in	17.9 in	17.1 in	15.6 in
Highest gear	92.8 in	80.0 in	84.4 in	92.8 in	65.5 in	70.9 in
Other specifications
Rear travel	150 mm	150 mm	150 mm	150 mm	130 mm	140 mm
Wheel size	29″	27.5″	29″	29″	24″	26″