YT Industries Jeffsy Primus 26

Name: YT Industries Jeffsy Primus 26
Brand: YT Industries

2023 YouthMountain youth Manufacturer page

YT Industries Jeffsy Primus 26, color Deep Yellow

Last known price: $2,199

Prices shown first for United States
Travel: 140 / 140 mm Fork / rear shock
Wheels: 26″
Drivetrain: 1 × 12 30t / 11–50t
Gear range: 455%
Weight: 14 kg 30.9 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

One Size 145–160

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

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size One Size

Table

Reach 397mm

Stack 549mm

Wheelbase 1105mm

Head angle 65.5°

Seat angle 76.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	397
Stackmm	549
Top tube lengthmm	533
Seat tube lengthmm	355
Head tube lengthmm	95
Head tube angle	65.5°
Seat tube angle	76.5°
Chainstay lengthmm	415
Wheelbasemm	1105
Front centermm	690
Bottom bracket dropmm	4
Bottom bracket heightmm	349
Fork rakemm	41
Stack/reach ratio	1.38

Not published by the manufacturer: Standover height, Trail, 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 kg

30.9 lb

Suspension

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

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 15.6 in
Highest gear: 70.9 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: 26″

Technical analysis

3 measures

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

Lowest gear

15.6 gear inches

This value is below the central range for this class.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 345 bicycles with this information
Coverage: 81.5% of the class

Highest gear

70.9 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 345 bicycles with this information
Coverage: 81.5% of the class

Shifting

Mechanical

20 of 423 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 423 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.0 km/h
Highest gear: 27.2 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: 15.6–70.9 gear inches
Class reference (p10–p90): 14.0–78.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2023
Lowest gear: 345 bicycles with this information, 81.5% of the class
Highest gear: 345 bicycles with this information, 81.5% 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 Primus 26	YT Industries Jeffsy Core 2 27	YT Industries Jeffsy Core 2 29	YT Industries Jeffsy Core 3 29	YT Industries Jeffsy Core 4 29	YT Industries Jeffsy Primus 24
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Aluminum
Bicycle weight	14 kg	15.3 kg	15.3 kg	14.7 kg	14.32 kg	12.6 kg
Suspension
Front travel	140 mm	150 mm	150 mm	150 mm	150 mm	130 mm
Drivetrain
Smallest chainring	30	32	32	32	32	30
Largest chainring	30	32	32	32	32	30
Rear sprockets	12	12	12	12	12	11
Smallest sprocket	11	11	11	10	10	11
Largest sprocket	50	50	50	52	52	42
Lowest gear	15.6 in	17.6 in	18.6 in	17.9 in	17.9 in	17.1 in
Highest gear	70.9 in	80.0 in	84.4 in	92.8 in	92.8 in	65.5 in
Other specifications
Rear travel	140 mm	150 mm	150 mm	150 mm	150 mm	130 mm
Wheel size	26″	27.5″	29″	29″	29″	24″