YT Industries Jeffsy Base 29

Name: YT Industries Jeffsy Base 29
Brand: YT Industries

2021 MountainEnduro Manufacturer page

Last known price: $2,299

Prices shown first for United States
Travel: 150 / 150 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Weight: 14.2 kg 31.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

15 of 17 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 Alloy 29" high modular alloy main 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

4 parts

Brakes

1 part

Brakes
- SRAM Guide T

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips
- ODI
Handlebar
- Race Face Aeffect R 35
Headset
- Acros
AZX-576
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
- YT Industries
Stem
- Race Face Aeffect R

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 470mm

Stack 627mm

Wheelbase 1226mm

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 Reach Stack

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	1182	1204	1226	1255	1277
Front centermm	748	770	792	816	838
Bottom bracket dropmm	24	24	24	24	24
Bottom bracket heightmm	352	352	352	352	352
Fork rakemm	49	49	49	49	49
Trailmm	113	113	113	113	113
Stack/reach ratio	1.44	1.38	1.33	1.30	1.26

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: Aluminum
Bicycle weight: 14.2 kg

31.3 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: 11
Largest sprocket: 50
Lowest gear: 18.6 in
Highest gear: 84.4 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: 2021
Sample: 1,011 bicycles with this information
Coverage: 99.0% of the class

Rear travel

150 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 839 bicycles with this information
Coverage: 82.1% of the class

Lowest gear

18.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Highest gear

84.4 gear inches

This value is below the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Shifting

Mechanical

65 of 1,021 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2021
Sample: 1,021 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.1 km/h
Highest gear: 32.3 km/h

Total gear range 455%

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: 18.6–84.4 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: 2021
Lowest gear: 892 bicycles with this information, 87.3% of the class
Highest gear: 892 bicycles with this information, 87.3% 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 2021 builds
Specification	This bicycle YT Industries Jeffsy Base 29	YT Industries Jeffsy Base	YT Industries Jeffsy Blaze 29	YT Industries Jeffsy Comp	YT Industries Jeffsy Comp 29	YT Industries Jeffsy Core 2
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Aluminum
Bicycle weight	14.2 kg	14.1 kg	14.2 kg	13.8 kg	13.9 kg	15.1 kg
Suspension
Front travel	150 mm	160 mm	150 mm	160 mm	150 mm	160 mm
Drivetrain
Smallest sprocket	11	11	10	11	11	10
Largest sprocket	50	50	52	50	50	50
Lowest gear	18.6 in	17.6 in	17.9 in	17.6 in	18.6 in	17.6 in
Highest gear	84.4 in	80.0 in	92.8 in	80.0 in	84.4 in	88.0 in
Other specifications
Tire width	2.4″	2.4″	2.5″	2.4″	2.4″	2.4″
Rear travel	150 mm	160 mm	150 mm	160 mm	150 mm	160 mm
Wheel size	29″	27.5″	29″	27.5″	29″	27.5″