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2025 YT Jeffsy Primus 26 Bike

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26 chip
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Where To Buy
Free shipping on orders over $69 (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.
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 Primus 26 Bike
Model Year
2025
Intended Use
Enduro / All-Mountain
Trail
Rider
Kids
Sizes and Geometry
One Size (low, high)
View Full Geometry
Sizes Additional Info
• Geometry adjustable via two-position flip chip in rear shock mount
• Intended for riders approximately 145-160cm (4'9"-5'3") tall
• All specifications listed are with 140mm travel fork with 40mm offset
View Full Geometry
Wheel Size
26"
Frame Material
Aluminum
Frame Material Details
Forged, multi-butted, hydro-formed alloy; bolt-on PA66 down tube protection; molded TPE rubber seatstay and chainstay protection; integrated chainsuck plate
Rear Travel
140mm
Rear Shock
RockShox Deluxe Select, rebound adjust, custom lightweight tune, 190mm length x 45mm stroke
Fork
RockShox Reba, air spring, rebound adjust, custom lightweight tune, 32mm stanchions, 40mm offset
Fork Travel
140mm
Head Tube Diameter
Tapered, 1.125" top, 1.5" bottom
Headset
ACROS AZX-576, ZeroStack
Handlebar
YT Alloy, 760mm width, 20mm rise, 35mm clamp diameter
Stem
YT Alloy, 40mm length, 0° rise, 35mm bar clamp
Grips
ODI Elite Motion V2.1, lock-on
Brakes
SRAM G2 R, 4-piston
Rotors: SRAM CenterLine, 180mm
Brake Levers
SRAM G2 R, tool-free reach adjust
Drivetrain
1x
Shifters
SRAM SX Eagle, 12-speed
Front Derailleur
None
Rear Derailleur
SRAM SX Eagle, 12-speed
ISCG Tabs
ISCG05
Chainguide
None
Cranks
SRAM SX Eagle Alloy DUB, 165mm length
Chainrings
SRAM SX Eagle, 30 tooth
Bottom Bracket
SRAM DUB
Pedals
None
Chain
12-speed
Cassette
SRAM SX Eagle PG-1210, 12-speed, 11-50 tooth
Rims
SUNringlé Düroc 30 Alloy, 26mm inner width
Hubs
SUNringlé Düroc wheelset, 15mm x 100mm front, 12mm x 148mm (Boost) rear with HG driver
Spokes
SUNringlé Düroc wheelset
Tires
Front: Maxxis Minion DHR II, 3C MaxxTerra compound, EXO casing, TR, 26" x 2.4"
Rear: Maxxis Minion DHR II, Dual compound, EXO casing, TR, 26" x 2.3"
Saddle
YT, Lux-Alloy rails, 140mm width
Seatpost
YT Postman V2 dropper, 100mm drop adjustable in 5/10/20mm increments
Seatpost Diameter
31.6mm
Seatpost Clamp
Single bolt
Rear Dropout / Hub Dimensions
12mm x 148mm (Boost)
Max. Tire Size
 
Bottle Cage Mounts
None
Colors
Deep Yellow
Warranty
5 years frame
Weight
30 lb 13.8 oz (14,000 g)
Miscellaneous
• V4L (Virtual 4-Link) rear suspension design
• Internal cable routing
• Intended for riders approximately 145-160cm (4'9"-5'3") tall
• Geometry adjustable via two-position flip chip in rear shock mount
Price
$2,299.00
More Info

YT JEFFSY PRIMUS 24, 26, and Now 27: Small in Size, Big on Performance (2023 press release)

YT website

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Where To Buy
Free shipping on orders over $69 (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.
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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