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2026 Transition Spire Alloy Eagle 90 Bike

a 90 black
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a 90 violet
chip
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Transition
Where To Buy
Free shipping on orders over $50 (contiguous 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.

Specifications

Product
Transition Spire Alloy Eagle 90 Bike
Model Year
2026
Intended Use
Enduro / All-Mountain
Freeride / Bike Park
Rider
Unisex
Sizes and Geometry
SM (high, low)
MD (high, low)
LG (high, low)
XL (high, low)
XXL (high, low)
View Full Geometry
Sizes Additional Info
• Geometry adjustable via two-position flip chip at lower shock mount


• All specifications listed are with 170mm travel fork with 584mm axle-to-crown length (including headset) and 44mm offset


• Saddle heights for effective seat tube angle listed above: 600mm (SM), 660mm (MD), 720mm (LG), 780mm (XL), 820mm (XXL)


• Seat tube offset at bottom bracket: 100mm (all sizes)
View Full Geometry
Wheel Size
29"
Frame Material
Aluminum
Frame Material Details
6061 heat-treated alloy; molded chainstay, seatstay, and down tube protection
Rear Travel
170mm
Rear Shock
RockShox Super Deluxe Ultimate, trunnion mount, 205mm length x 65mm stroke
Fork
RockShox ZEB Ultimate, 38mm stanchions, 44mm offset
Fork Travel
170mm
Head Tube Diameter
Straight, 56mm
Headset
FSA No.55R/57, ZS56 upper/lower
Handlebar
Burgtec Ride Wide Alloy Enduro, 35mm clamp diameter
SM: 800mm width, 20mm rise; MD: 780mm width, 30mm rise; LG/XL: 800mm width, 38mm rise
Stem
Burgtec Enduro MK3, 35mm length, 35mm bar clamp
Grips
ODI Longneck V2.1, lock-on
Brakes
SRAM Maven Bronze, 4-piston
Rotors: SRAM CenterLine, 200mm
Brake Levers
SRAM Maven Bronze Stealth, tool-free reach adjust
Drivetrain
1x
Shifters
SRAM Eagle 90 Transmission, 12-speed, MMX mounting bracket
Front Derailleur
None
Rear Derailleur
SRAM Eagle 90 Transmission, 12-speed
ISCG Tabs
ISCG05
Chainguide
e*thirteen Vario Enduro upper slider with bashguard
Cranks
SRAM Eagle 90 Transmission Alloy DUB, 165mm length
Chainrings
SRAM Eagle 90 Transmission, 30 tooth
Bottom Bracket
SRAM DUB, 73mm English/BSA threaded
Pedals
None
Chain
SRAM GX Eagle Transmission Flattop, 12-speed
Cassette
SRAM GX Eagle Transmission XS-1275, 12-speed, 10-52 tooth
Rims
DT Swiss E 1900 Spline 30 Alloy, 30mm inner width
Hubs
DT Swiss 370, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with Ratchet LN freehub and XD driver
Spokes
DT Swiss Champion
Tires
Front: Schwalbe Magic Mary, Radial Trail Pro casing, Ultra Soft compound, 29" x 2.5"
Rear: Schwalbe Albert, Radial Gravity Pro casing, Soft compound, 29" x 2.5"
Saddle
SDG Bel-Air V3
Seatpost
OneUp dropper
Drop: 150mm (SM), 190mm (MD), 210mm (LG), 240mm (XL)
Seatpost Diameter
31.6mm
Seatpost Clamp
Single bolt, 34.9mm
Rear Dropout / Hub Dimensions
12mm x 148mm (Boost)
Max. Tire Size
29" x 2.6"
Bottle Cage Mounts
One inside front triangle, plus accessory mounts under top tube
Colors
Galactic Black, Ultra Violet
Warranty
Lifetime frame
Weight
 
Miscellaneous
• GiddyUp Four-Bar Horst-Link rear suspension design
• Geometry adjustable via two-position flip chip at lower shock mount
• Internal cable routing
• SRAM UDH (Universal Derailleur Hanger)
• Rear travel can be decreased to 160mm with 60mm-stroke shock
• Compatible with coil shocks and dual-crown forks
• Includes tubeless valves and tire sealant
• Frame weight, size MD with FOX FLOAT X2 Factory shock: 10.6 lbs (4.81 kg)
Price
$5,599.00
More Info

Transition website

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Where To Buy
Free shipping on orders over $50 (contiguous 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.
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