2021 YT Industries Jeffsy Core 4 29
- Design
- Flat Bar, Full suspension
- Frame
- Carbon/Composite
- Suspension
- 150mm fork travel, 150mm rear travel
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
S high | S low | M high | M low | L high | L low | XL high | XL low | XXL high | XXL low | |
Stack | 618mm | 618mm | 622mm | 622mm | 627mm | 627mm | 636mm | 636mm | 640mm | 640mm |
Reach | 430mm | 430mm | 450mm | 450mm | 470mm | 470mm | 490mm | 490mm | 510mm | 510mm |
Stack to Reach Ratio | 1.44:1 | 1.44:1 | 1.38:1 | 1.38:1 | 1.33:1 | 1.33:1 | 1.3:1 | 1.3:1 | 1.25:1 | 1.25:1 |
Seat Tube Length, C-T | 400mm | 400mm | 415mm | 415mm | 435mm | 435mm | 460mm | 460mm | 485mm | 485mm |
Top Tube Length, Effective/Horizontal HT Top | 572mm | 572mm | 593mm | 593mm | 615mm | 615mm | 638mm | 638mm | 660mm | 660mm |
Top Tube Slope | 23.8deg | 23.7deg | 21.9deg | 21.8deg | 19.7deg | 19.7deg | 17.6deg | 17.6deg | 15.2deg | 15.1deg |
Head Tube Angle | 66.5deg | 66deg | 66.5deg | 66deg | 66.5deg | 66deg | 66.5deg | 66deg | 66.5deg | 66deg |
Seat Tube Angle | 77.5deg | 77deg | 77.5deg | 77deg | 77.5deg | 77deg | 77.5deg | 77deg | 77.5deg | 77deg |
Head Tube Length | 100mm | 100mm | 105mm | 105mm | 110mm | 110mm | 120mm | 120mm | 125mm | 125mm |
Bottom Bracket Drop | 24mm | 32mm | 24mm | 32mm | 24mm | 32mm | 24mm | 32mm | 24mm | 32mm |
Bottom Bracket Height | 348mm | 340mm | 348mm | 340mm | 348mm | 340mm | 348mm | 340mm | 348mm | 340mm |
Chainstay Length | 435mm | 435mm | 435mm | 435mm | 435mm | 435mm | 440mm | 440mm | 440mm | 440mm |
Chainstay Length Horizontal | 434.3mm | 433.8mm | 434.3mm | 433.8mm | 434.3mm | 433.8mm | 439.3mm | 438.8mm | 439.3mm | 438.8mm |
Front-Center | 740.1mm | 740.9mm | 762mm | 762.9mm | 784mm | 784.8mm | 808mm | 808.8mm | 830mm | 830.8mm |
Front-Center Horizontal | 739.7mm | 740.2mm | 761.7mm | 762.2mm | 783.7mm | 784.2mm | 807.7mm | 808.2mm | 829.7mm | 830.2mm |
Wheelbase | 1174mm | 1174mm | 1196mm | 1196mm | 1218mm | 1218mm | 1247mm | 1247mm | 1269mm | 1269mm |
Fork Offset/Rake | 47.1mm | 45mm | 47.4mm | 45.2mm | 47.2mm | 45mm | 47.3mm | 45mm | 47.5mm | 45.2mm |
Trail | 110.4mm very high | 116.3mm very high | 110.1mm very high | 116.1mm very high | 110.3mm very high | 116.3mm very high | 110.2mm very high | 116.4mm very high | 109.9mm very high | 116.1mm very high |
Mechanical Trail | 101.2mm | 106.3mm | 101mm | 106.1mm | 101.1mm | 106.3mm | 101mm | 106.3mm | 100.8mm | 106.1mm |
Wheel Flop | 40.4mm | 43.2mm | 40.3mm | 43.1mm | 40.3mm | 43.2mm | 40.3mm | 43.2mm | 40.2mm | 43.2mm |
Standover Height | 706mm | 706mm | 702mm | 702mm | 701mm | 701mm | 693mm | 693mm | 694mm | 694mm |
Tire to Pedal Spindle | 198.1mm 170 mm cranks | 198.9mm 170 mm cranks | 220.1mm 170 mm cranks | 220.9mm 170 mm cranks | 242.1mm 170 mm cranks | 242.9mm 170 mm cranks | 266.1mm 170 mm cranks | 266.8mm 170 mm cranks | 288mm 170 mm cranks | 288.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 178mm 170 mm cranks | 170mm 170 mm cranks | 178mm 170 mm cranks | 170mm 170 mm cranks | 178mm 170 mm cranks | 170mm 170 mm cranks | 178mm 170 mm cranks | 170mm 170 mm cranks | 178mm 170 mm cranks | 170mm 170 mm cranks |
Core 4 29 Build
S high | S low | M high | M low | L high | L low | XL high | XL low | XXL high | XXL low | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Outer Diameter | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm | 743.9mm |
Bike Length with Tires | 1917.9mm | 1917.9mm | 1939.9mm | 1939.9mm | 1961.9mm | 1961.9mm | 1990.9mm | 1990.9mm | 2012.9mm | 2012.9mm |
Published Sizing Recommendations
Height | 154 cm to 1655 cm | 154 cm to 1655 cm | 164 cm to 175 cm | 164 cm to 175 cm | 174 cm to 184 cm | 174 cm to 184 cm | 183 cm to 193 cm | 183 cm to 193 cm | 192 cm to 202 cm | 192 cm to 202 cm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Full-suspension All-mountain/Enduro MTBSource:https://us.yt-industries.com/detail/index/sArticle/374/sPreview/1?number=101369#tech2