YT Industries Jeffsy Base

Name: YT Industries Jeffsy Base
Brand: YT Industries

2020 MountainEnduro Manufacturer page

Last known price: $2,299

Prices shown first for United States
Travel: 160 / 160 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Weight: 14.1 kg 31.1 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 27,5" 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 462mm

Stack 617mm

Wheelbase 1215mm

Head angle 65.5°

Seat angle 76.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ 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	422	442	462	482	502
Stackmm	598	608	617	626	635
Top tube lengthmm	567	590	613	636	660
Seat tube lengthmm	395	415	435	460	485
Head tube lengthmm	110	120	130	140	150
Head tube angle	65.5°	65.5°	65.5°	65.5°	65.5°
Seat tube angle	76.5°	76.5°	76.5°	76.5°	76.5°
Chainstay lengthmm	432	432	432	437	437
Wheelbasemm	1167	1191	1215	1244	1268
Front centermm	735	759	783	807	831
Bottom bracket dropmm	6	6	6	6	6
Bottom bracket heightmm	352	352	352	352	352
Fork rakemm	39	39	39	39	39
Trailmm	119	119	119	119	119
Stack/reach ratio	1.42	1.38	1.34	1.30	1.27

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: 14.1 kg

31.1 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 160 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: 17.6 in
Highest gear: 80.0 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: 27.5″

Technical analysis

5 measures

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

Front travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2020
Sample: 829 bicycles with this information
Coverage: 98.5% of the class

Rear travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2020
Sample: 678 bicycles with this information
Coverage: 80.6% of the class

Lowest gear

17.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2020
Sample: 705 bicycles with this information
Coverage: 83.8% of the class

Highest gear

80.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Enduro Model year: 2020
Sample: 705 bicycles with this information
Coverage: 83.8% of the class

Shifting

Mechanical

50 of 841 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2020
Sample: 841 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.7 km/h
Highest gear: 30.6 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: 17.6–80.0 gear inches
Class reference (p10–p90): 17.3–93.5 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2020
Lowest gear: 705 bicycles with this information, 83.8% of the class
Highest gear: 705 bicycles with this information, 83.8% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle YT Industries Jeffsy Base	YT Industries Jeffsy Base 29	YT Industries Jeffsy Comp	YT Industries Jeffsy Comp 29	YT Industries Jeffsy Primus JP 24	YT Industries Jeffsy Primus JP 26
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Aluminum	Aluminum
Bicycle weight	14.1 kg	14.2 kg	13.8 kg	13.9 kg	12.3 kg	13.9 kg
Suspension
Front travel	160 mm	150 mm	160 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
Largest sprocket	50	50	50	50	42	50
Lowest gear	17.6 in	18.6 in	17.6 in	18.6 in	17.1 in	15.6 in
Highest gear	80.0 in	84.4 in	80.0 in	84.4 in	65.5 in	70.9 in
Cockpit
Seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Rigid seatpost	Dropper seatpost
Other specifications
Fork spring	Air	Air	Air	Air	Not informed	Air
Rear travel	160 mm	150 mm	160 mm	150 mm	130 mm	140 mm
Wheel size	27.5″	29″	27.5″	29″	24″	26″