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2025 YT Jeffsy Core 2 AL Bike

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Where To Buy
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
$3,599.94
Free shipping on orders over $69 (continental U.S. only).
International shipping available. Some exclusions apply.
Free U.S. shipping on everything.
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (contiguous U.S. only).
International shipping available. Some exclusions apply.

Specifications

Product
YT Jeffsy Core 2 AL Bike
Model Year
2025
Intended Use
Enduro / All-Mountain
Trail
Rider
Unisex
Sizes and Geometry
SM (low, high)
MD (low, high)
LG (low, high)
XL (low, high)
XXL (low, high)
View Full Geometry
Sizes Additional Info
• Geometry adjustable via two-position flip chip in rear shock mount
• All specifications listed are with 150mm travel fork with 44mm offset
View Full Geometry
Wheel Size
29"
Frame Material
Aluminum
Frame Material Details
Forged multi-butted aluminum alloy; molded seatstay, chainstay, and bolt-on lower down tube protection
Rear Travel
145mm
Rear Shock
FOX FLOAT X Performance, 2-position compression lever, custom tune, 210mm length x 55mm stroke
Fork
FOX FLOAT 36 Performance, GRIP damper, 44mm offset
Fork Travel
150mm
Head Tube Diameter
Tapered, 1.125" top, 1.5" bottom
Headset
Cane Creek Series 10; ZS44 upper, ZS56 lower
Handlebar
YT, 780mm width, 30mm rise, 8° backsweep, 6° upsweep, 35mm clamp diameter
Stem
Race Face Aeffect R, 50mm length, 0° rise, 35mm bar clamp
Grips
ODI Elite Motion V2.1, lock-on
Brakes
Hayes Dominion A4, 4-piston, 203mm 6-bolt rotors
Brake Levers
Hayes Dominion A4, tool-free reach adjust
Drivetrain
1x
Shifters
Shimano Deore XT M8100, 12-speed, RAPIDFIRE PLUS
Front Derailleur
None
Rear Derailleur
Shimano SLX M7100, 12-speed, SHADOW RD+
ISCG Tabs
ISCG05
Chainguide
None
Cranks
Shimano SLX M7100 Alloy, 170mm length, HOLLOWTECH II
Chainrings
Shimano SLX M7100, 32 tooth
Bottom Bracket
92mm press-fit
Pedals
None
Chain
Shimano, 12-speed
Cassette
Shimano SLX M7100, 12-speed, 10-51 tooth
Rims
DT Swiss M1900 Alloy, 30mm inner width
Hubs
DT Swiss M1900 wheelset, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with Ratchet LN freehub and MICRO SPLINE driver
Spokes
DT Swiss M1900 wheelset
Tires
Front: Maxxis Minion DHF, 3C MaxxTerra compound, EXO+ casing, TR, 29" x 2.5"
Rear: Maxxis Minion DHR II, 3C MaxxTerra compound, EXO+ casing, TR, 29" x 2.4"
Saddle
SDG Bel-Air 3.0 Overland, Lux-Alloy rails, 140mm width, YT Custom design
Seatpost
YT Postman V2 dropper, 5/10/20mm adjustable travel, MMX-bracket remote lever
Drop: 125mm (SM), 150mm (MD), 170mm (LG), 200mm (XL), 230mm (XXL)
Seatpost Diameter
31.6mm
Seatpost Clamp
Single bolt
Rear Dropout / Hub Dimensions
12mm x 148mm (Boost)
Max. Tire Size
 
Bottle Cage Mounts
One inside front triangle, plus accessory mounts under top tube
Colors
Frost Blue, Black Magic
Warranty
5 years frame
Weight
34 lb 9.8 oz (15,700 g)
Miscellaneous
• MKIII version
• V4L (Virtual 4-Link) rear suspension design
• Internal cable routing
• Geometry adjustable via two-position flip chip in rear shock mount
• SRAM UDH (Universal Derailleur Hanger)
• Weight given for size SM set up tubeless, without bottle/cage
• Includes Thirstmaster 6000 water bottle and side-load cage
• Includes removable HEX6 tool in rear axle
• EU/UK price: 3499 EUR/GBP
• Canadian price: 4999 CAD
Price
$3,499.00
More Info

YT Introduces the Updated Jeffsy Core Range (press release)

YT website

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Where To Buy
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
$3,599.94
Free shipping on orders over $69 (continental U.S. only).
International shipping available. Some exclusions apply.
Free U.S. shipping on everything.
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (contiguous U.S. only).
International shipping available. Some exclusions apply.
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