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Yeti Cycles
SB4.5 Carbon X01 Complete Mountain Bike - 2016

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Trail pedigree with XC ambitions.

When Yeti discontinued its SB95 last year without a replacement, loyal fans waited anxiously to hear about what the brand had in the works and when they'd get to see it. The new SB4.5 Carbon X01 Complete Mountain Bike is their answer — a moderately slack 4.5-inch travel 29er designed for stability and speed on the trails with plenty of snappy climbing capability that demonstrates Yeti's faith in the 29er in the midst of the 27.5's rising popularity.


Though it was created to fill the trail niche in Yeti's line, the SB4.5 has a notable focus on lightness to keep it versatile enough for other disciplines. The carbon fiber frame is stiff and light, with a relaxed 67.5 degree head tube angle and stability-enhancing 17.2 inch chainstays that don't get in the way on climbs. The FOX 34 Factory fork also provides confidence on descents, with 140mm of plush, forgiving travel that gives you the option to pick a line when you feel like it, and point the bike downhill when you don't. Yeti uses its relatively new Switch Infinity suspension in the SB4.5, which keeps the pedal stroke consistent and aims to reduce squat using a pivot system that switches direction as you move through the bike's travel.


Yeti's inclusion of a 12x148mm Boost rear axle also contributes to the SB4.5's stiff, efficient pedaling platform, and the departure from the 142mm standard allows for more space between the hubs for better tire clearance — especially relevant for 29ers. With a greater hub distance, you also get a smaller, steeper spoke angle, which creates a stiffer wheel and chassis platform. Finally, the hub's bearings themselves will experience less damaging torsional forces with the increase in space, prolonging their lifespan and leading to a more efficient rear triangle as a whole. This stiffness is what makes the SB4.5 more adept at climbing than you'd expect, aptly demonstrating Yeti's reluctance to allow its bikes to fall too neatly into one category alone.


This build kit features SRAM's X01 drivetrain — a light, fast groupset with a wide cassette ratio for versatility over varied terrain, along with SRAM's Guide hydraulic braking system for reliable stopping power on aggressive descents. As usual, Yeti doesn't skimp on the finishing touches, including a SRAM Reverb hydraulic dropper seatpost for seamless transitions through changes in terrain, as well as DT Swiss XM401 aluminum rims wrapped in Maxxis tubeless tires — the front rim receiving the Ardent, with the Ikon in the rear.


Details

  • A wagon-wheel super bike with bad intentions on the trail
  • 4.5in of Yeti's premier suspension design devours big hits
  • Trail bike geometry remains stable across the funky stuff
  • Stiff, light carbon frame brooks no nonsense on climbs
  • Build kit is a SRAM/Race Face knuckle sandwich
  • Item #YTI002Y
Frame Material
carbon fiber
Suspension
Switch Infinity
Rear Shock
FOX FLOAT Factory DPS
Rear Travel
4.5 in
Fork
FOX 34 Factory
Front Travel
140 mm
Headset
Cane Creek 40
Shifters
SRAM X01
Rear Derailleur
SRAM X01 (11-speed)
Crankset
30 T Race Face Turbine
Bottom Bracket
Race Face
Cassette
10 - 42 T SRAM 1180
Chain
SRAM 1130
Brakeset
SRAM Guide RSC
Brake Type
hydraulic disc
Rotors
[front] 180 mm, [rear] 160 mm
Handlebar
Easton Haven carbon
Handlebar Width
740 mm
Grips
Yeti Lock-On
Stem
Easton Haven
Saddle
Yeti WTB custom
Seatpost
SRAM Reverb
Wheelset
DT Swiss XM401
Hubs
DT Swiss 350
Front Axle
15 x 110mm Boost
Rear Axle
12 x 148mm Boost
Tires
[front] Maxxis Ardent 2.4, [rear] Maxxis Ikon 2.2
Tire Size
[front] 29 in x 2.4 in, [rear] 29 in x 2.2 in
Recommended Use
trail
Manufacturer Warranty
5 years limited on frame

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