YT Industries Jeffsy 29 AL Base

Name: YT Industries Jeffsy 29 AL Base
Brand: YT Industries

2019 MountainTrail Manufacturer page

Last known price: $2,399

Prices shown first for United States
Travel: 140 / 140 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 11–50t
Gear range: 455%
Weight: 13.9 kg 30.6 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

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 ALLOY 29" hydro-formed aluminum frame, V4L Virtual 4-Link rear suspension, 148x12mm DT Swiss QR Thru axle, 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 Aeffect R 35
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
- SDG Tellis
Stem
- Race Face Aeffect R

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 425mm

Stack 610mm

Wheelbase 1154mm

Head angle 67.0°

Seat angle 74.5°

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 Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	405	425	445	465
Stackmm	605	610	623	628
Top tube lengthmm	571	592	616	637
Seat tube lengthmm	400	440	480	520
Head tube lengthmm	90	95	110	115
Head tube angle	67°	67°	67°	67°
Seat tube angle	74.5°	74.5°	74.5°	74.5°
Chainstay lengthmm	435	435	440	440
Wheelbasemm	1132	1154	1178	1205
Front centermm	698	720	739	766
Bottom bracket dropmm	24	24	24	24
Bottom bracket heightmm	350	350	350	350
Fork rakemm	42	42	36	41
Trailmm	113	113	120	114
Stack/reach ratio	1.49	1.44	1.40	1.35

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: 13.9 kg

30.6 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: 11
Largest sprocket: 50
Lowest gear: 19.7 in
Highest gear: 89.6 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

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

89.6 gear inches

This value is within 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: 34.3 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: 19.7–89.6 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

Differences across 2019 builds
Specification	This bicycle YT Industries Jeffsy 29 AL Base	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 CF Comp
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Carbon
Bicycle weight	13.9 kg	13.8 kg	13.3 kg	12.9 kg	12.7 kg	13.4 kg
Suspension
Front travel	140 mm	150 mm	150 mm	150 mm	160 mm	140 mm
Drivetrain
Smallest chainring	34	34	32	34	32	32
Largest chainring	34	34	32	34	32	32
Rear sprockets	12	12	11	12	11	11
Smallest sprocket	11	11	9	10	9	9
Largest sprocket	50	50	46	50	46	46
Lowest gear	19.7 in	18.7 in	19.1 in	18.7 in	19.1 in	20.2 in
Highest gear	89.6 in	85.0 in	97.8 in	93.5 in	97.8 in	103.1 in
Other specifications
Fork spring	Air	Air	Air	Not informed	Air	Air
Tire width	2.4″	2.4″	2.35″	2.35″	2.35″	2.35″
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″
Bottom bracket standard	Not informed	Not informed	BB86/BB92	Not informed	BB86/BB92	BB86/BB92