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Yeti Cycles SB4.5 Carbon GX Eagle Complete Mountain Bike - 2018

Yeti Cycles SB4.5 Carbon GX Eagle Complete Mountain Bike - 2018
$5,199.00

Item # YTI00AA

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  • Raw, S ($5,199.00)
  • Raw, M ($5,199.00)
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Item # YTI00AA

Description

Pedal like a butterfly, sting like a Yeti.

It seems that industry publications and tradeshow buzz has been all about huge enduro sleds with plus-sized tires and slacked-out geometries of late, but the SB4.5 Carbon GX Eagle Complete Mountain Bike proves that even flow-centric brands like Yeti Cycles are still into the trail scene. It's a moderately slack 29er with 4.5in of travel that's designed for stability and speed on descents with plenty of snap on climbs for cyclists who still earn their laps the old-fashioned way.

Though it was created to fill the trail niche in Yeti's line, the SB4.5 has a noticeable focus on losing weight, which combines with the wagon wheels to keep it versatile enough for straight-up XC riding. The carbon fiber frame is stiff and light, with a relaxed 67.5-degree head tube angle and stability-enhancing 17.2in chainstays that don't get in the way on climbs. The FOX Performance 34 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 just 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 reduces squat by using a pivot system that switches direction as you move through the bike's travel.

Yeti's inclusion of Boost axles also contributes to the SB4.5's stiff, efficient pedaling platform, and the departure from the 142mm rear standard allows for more space between the hubs for better tire clearance and shorter chainstays—dimensions that are especially relevant for 29ers. With a greater hub distance, you also get a better spoke bracing angle, which creates a stiffer wheel and chassis platform. Finally, the hub's bearings themselves will experience less damaging torsional forces with the wider footprint, prolonging their lifespan and leading to a more efficient rear triangle as a whole. This stiffness and Switch Infinity's pedal-ability are what make 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.

While Yeti's Shimano builds tend to feature Race Face cranks, this build takes full advantage of SRAM's Eagle gearing. The 30t chainring and comically huge 10 - 50t spread out back ensure you'll almost never find yourself without a gear whether you're burning up hardpack or laboring up a punishing grade. Either way, the finishing touch of a FOX Transfer dropper post ensures that you'll never be more than a switch throw away from keeping your saddle at the right height.

  • A 29er that pedals like a trail bike but drops in like a Yeti
  • 4.5in of Yeti's premier Switch Infinity devours big hits
  • Trail bike geometry remains stable across the funky stuff
  • Stubby stays keep 29er handling sharp
  • Stiff, light carbon frame brooks no nonsense on climbs
  • Massive BB shell and Boost spacing maintain stiff pedaling
  • Dropper post keeps your perch at the right height
  • SRAM Eagle gearing covers every gradient, up or down

Tech Specs

Frame Material:
carbon fiber
Suspension:
Switch Infinity
Rear Shock:
FOX Performance DPS
Rear Travel:
114mm
Fork:
FOX Performance 34
Front Travel:
140mm
Headset:
Cane Creek 40
Shifters:
SRAM GX Eagle
Front Derailleur:
n/a
Rear Derailleur:
SRAM GX Eagle
ISCG Tabs:
no
Crankset:
30t SRAM GX Eagle
Bottom Bracket:
PF90
Cassette:
10 - 50t SRAM 1275
Chain:
SRAM GX Eagle
Brakeset:
SRAM Guide R
Brake Type:
hydraulic disc
Rotors:
[front] 180mm, [rear] 160mm
Handlebar:
Race Face Evolve
Handlebar Width:
750mm
Grips:
Ergon GA2
Stem:
Race Face Ride
Stem Length:
60mm
Saddle:
WTB custom
Seatpost:
FOX Transfer
Seatpost Diameter:
30.9mm
Wheelset:
DT Swiss M1900
Front Axle:
15 x 110mm Boost
Rear Axle:
12 x 148mm Boost
Tires:
Maxxis Ardent Exo TR
Tire Size:
[front] 29 x 2.4in, [rear] 29 x 2.25in
Pedals:
not included
Claimed Weight:
28.6lb
Recommended Use:
trail
Manufacturer Warranty:
5 years limited on frame

Geometry Chart

Yeti Cycles

Geometry Chart

 

SB4.5 Carbon
140mm Travel Fork
 

Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over

Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Height

(BBH)

Chainstay

(CS)

Wheelbase
S 16.5in 22.8in 23.9in 15.6in 29.6in 3.5in 67.4o 73.3o 13.1in 17.2in 44.4in
M 17.5in 23.8in 24.1in 16.6in 29.6in 3.7in 67.4o 73.3o 13.1in 17.2in 45.4in
L 19in 24.8in 24.5in 17.5in 29.6in 4.1in 67.4o 73.3o 13.1in 17.2in 46.4in
XL 20.5in 25.8in 25in 18.3in 29.6in 4.7in 67.4o 73.3o 13.1in 17.2in 47.5in

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