YT Industries YT Jeffsy CORE 4 29 2021
2021 Mountain
Estimate price |
5,199$
Weight | 13.9 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Carbon -
Wheels 29" -
Travel Front 150mm -
Travel Rear 150mm -
Fork Fox Factory Float 36
-
Groupset X01 Eagle, Truvativ Descendant Carbon -
Suspension Full -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
154cm - 166cm
MD
163cm - 176cm
LG
173cm - 185cm
XL
182cm - 194cm
XXL
191cm - 202cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Carbon
Suspension Fork
FOX 36 FLOAT FACTORY, 29“ | 150 mm Travel | Grip 2 | 110 x 15 mm Axle | 44 mm Offset
Rear Shock
FOX FLOAT DPX2 FACTORY, Shock Length: 210 mm | Shock Stroke: 55 mm ? 150 mm Travel | 3pos-Adjust
Drivetrain
Rear Derailleur
SRAM X01 EAGLE, 12-speed
Shift Levers
SRAM X01 EAGLE, 12-speed
Cassette
SRAM XG1295 EAGLE, 10-52T | 12-speed
Crank
SRAM Descendant Carbon, Crank Arm Length 175 mm | 32T I DUB-PressFit
Wheels
Rims
DT SWISS XM 1700 SPLINE, Aluminum Rims 29“ | Inner Width 30 mm | Front Hub 110 x 15 mm | Rear Hub 148 x 12 mm I XD I Ratchet 36SL
Tires
MAXXIS MINION DHR II, Front Tire Size 29“ x 2.4 | EXO Casing | Tubeless Ready | 3C MaxxGrip Compound / Rear Tire Size 29“ x 2.4 | EXO+ Casing | Tubeless Ready | 3C MaxxTerra Compound
Brakes
Brakes
SRAM G2 RSC, Rotor CENTERLINE Ø front 200 mm / rear 200 mm | Adjustable Bite Point and Reach
Cockpit
Stem
RENTHAL APEX 35, 50 mm |+/-6° | Black/ Gold
Handlebar
RENTHAL FATBAR 35, 780mm | 30mm Rise | 7° Back | 5° Up | Custom Black
Grips
ODI ELITE MOTION V2.1, Lock-On
Headset
ZS44 ZS56 | High Cap | 2 Spacer 5 mm, ACROS AZX-576
Seat
Saddle
SDG BEL AIR 3.0, YT Custom | Width 140 mm
Seatpost
YT POSTMANMMX Remote, Ø 31.6mm | 125 mm (S-M) | 150 mm (L) | 170 mm (XL-XXL)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL | XXL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.437 mm | 1.382 mm | 1.334 mm | 1.298 mm | 1.255 mm |
| Bottom Bracket Height | 344 mm | 344 mm | 344 mm | 344 mm | 344 mm |
| Front Center | 741 mm | 763 mm | 785 mm | 809 mm | 831 mm |
| Rake | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Trail | 117 mm | 117 mm | 117 mm | 117 mm | 117 mm |
| Stack | 618 mm | 622 mm | 627 mm | 636 mm | 640 mm |
| Reach | 430 mm | 450 mm | 470 mm | 490 mm | 510 mm |
| Top Tube Length | 572 mm | 593 mm | 615 mm | 638 mm | 660 mm |
| Seat Tube Angle | 77 ° | 77 ° | 77 ° | 77 ° | 77 ° |
| Seat Tube Length | 400 mm | 415 mm | 435 mm | 460 mm | 485 mm |
| Head Tube Angle | 66 ° | 66 ° | 66 ° | 66 ° | 66 ° |
| Head Tube Length | 100 mm | 105 mm | 110 mm | 120 mm | 125 mm |
| Chainstay Length | 435 mm | 435 mm | 435 mm | 440 mm | 440 mm |
| Wheelbase | 1174 mm | 1196 mm | 1218 mm | 1247 mm | 1269 mm |
| Bottom Bracket Drop | 32 mm | 32 mm | 32 mm | 32 mm | 32 mm |
| Standover Height | 706 mm | 702 mm | 701 mm | 693 mm | 694 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" |
| Rider Min Height | 154 cm | 163 cm | 173 cm | 182 cm | 191 cm |
| Rider Max Height | 166 cm | 176 cm | 185 cm | 194 cm | 202 cm |
Model Overview
Jeffsy CORE 4 29 is part of the Yt Jeffsy model. YT released 64 bikes variations of this model so far. Take a sneak peek at all Yt Jeffsy bikes models from 2021, by clicking here.
Model range prices
The most economical model, the YT Jeffsy Primus 2021 has a starting price of 1899$. YT JEFFSY Pro Race 29 2021 on the other hand is the most expensive at 5299$.
Safety
Your safety should be the top priority when you go for a ride. In short, make sure that you always use a helmet, high visibility clothing, and proper lights when riding at night-time.
Enduro bikes average price
According to our calculations, the average cost of an Enduro bike that is reliable is 3599$. However, even if your budget is less than the average, you might still be able to get a top-quality Enduro bike. To sum up, when you purchase your bike, make sure to check if it has reviews, and also do some components research.
Furthermore, this bike was made available in 2021 for 5199$. Comparing this to the average Enduro bike price, we see that the price is 44.46% more expensive.
Enduro bikes average weight
If we make a quick analysis of the average weight of an Enduro bike, we get 14.27 kg (31.46 lbs). An easier bike will give you a big advantage in climbs. However, a heavier bike can gain speed when you descend.
YT Jeffsy CORE 4 29 it’s weighing 13.9 kg (30.64 lbs). At this weight, is slightly lighter than average. To sum up, it’s 2.66% lighter than the average weight of Enduro bikes.
Jeffsy CORE 4 29 components
Fork
YT Jeffsy CORE 4 29 2021 bike is equipped with the Fox Factory Float 36 fork, and has 150mm travel. Bike forks are great for shock absorption and provide you with a smooth ride. In short, you should always ensure you have a good fork when purchasing a bike.
Rear Shock
YT Jeffsy CORE 4 29 bike has the FOX FLOAT DPX2 FACTORY model installed, and has a travel of 150mm. Rear shocks offer better comfort, better traction, and better cornering. This allows for quicker riding on rough roads and trails. In short, if you want smooth rides, get a full-suspension bicycle.
Wheels
As for the wheels, YT Jeffsy CORE 4 29 2021, has a 29″ aluminum model. With 29″ wheels, bumps will feel lighter and you’ll gain more speed on descends, compared to smaller wheel-sized bikes. However, these wheels are not ideal for smaller people.
Brakes
When you want to stop the bike in time, the brakes are vital. The Jeffsy CORE 4 29 has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, these are ideal for anyone.
Sizes
This bike is available in 5 sizes. They vary from 154 cm – 202 cm (5.05 ft – 6.63 ft). In conclusion, you won’t have a problem finding one that suits you.
Dropper post
The YT model is also equipped with a dropper post. Needless to say, a dropper post will come in handy on climbs and descends. You’ll fall in love with it at first sight!