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2017 Yeti Cycles SB4.5 Turq X01 Eagle Complete Mountain Bike

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2017 Yeti Cycles SB4.5 Turq X01 Eagle Complete Mountain Bike

 

If you’re looking for a whip-fast bike that can handle some bigger terrain on occasion, look no further than the 2017 Yeti Cycles SB4.5 Turq X01 Eagle Complete Mountain Bike. It blends XC speed with geometry to handle the bigger stuff, and now carries Yeti’s new Turq designation for an even lighter footprint than its predecessor. Turq manifests as a more precise carbon layup that’s carefully molded to reinforce key stress points without adding bulk, resulting in strength where you need it and light weight where you don’t. In the end, Yeti claims that Turq construction nets a savings of 300g compared to the regular SB4.5 Carbon—a stat that lends the SB4.5 Turq more climbing pedigree and complements the bike’s surprisingly climb-happy X01 Eagle drivetrain.

Yeti also says that the SB4.5 has a stiffer pedaling platform than most of its other bikes. While we don’t have numbers to verify this claim, it’s definitely a responsive go-getter when the going gets mashy, and we think the inclusion of a Boost 148mm rear axle is at least partially responsible for the bike’s eagerness on climbs. Coupled with the innate aggression of 29in wheels and the stiff, collet-style hardware, the boosted rear triangle certainly feels every bit as stiff as any of Yeti’s other models.

The frame’s aggressive speed is not to be outdone by its slack front end and surprisingly capable Switch Infinity suspension, though. Its 67.4-degree head tube is one of the slackest we’ve seen on an XC-leaning 29er, and it makes for a boost of confidence while picking lines across terrain that would make a more typical 70-degree head tube stumble. The Switch Infinity suspension is equally confidence-inspiring, and its linear travel hits the sweet spot of anti-squat to keep pedaling sharp across rocky climbs. It also erases the momentary harshness that its predecessor, the Switch Link design, would display when pushed to the absolute limit.

Of course, most riders didn’t experience that dead spot on the Switch Link, but the SB4.5 isn’t for most riders. It’s for the all-mountain racer who demands that their machine flattens big hits with the same tenacity that it cleans long climbs. In our experience, the SB4.5’s Switch Infinity suspension isn’t quite as soft off the top as the 5.5 and it finds the bottom when we overshoot a landing. That said, the steeper head tube produces sharper handling and rewards technique while picking lines, making the SB4.5 more fun if you value finesse over just bombing terrain.

 

2017 Yeti Cycles SB4.5 Turq X01 Eagle Complete Mountain Bike

A mid-travel 29er with expanded capability

4.5in of smooth Switch Infinity suspension

Geometry balances slack and moderate for confident handling

Turq carbon construction drops weight and bolsters stiffness

Boost axles track on descents and transfers power on climbs

SRAM’s X01 Eagle drivetrain provides the ultimate bailout gear

 

2017 Yeti Cycles SB4.5 Turq X01 Eagle Complete Mountain Bike

Frame Material:

Turq carbon fiber

Suspension:

Switch Infinity

Rear Shock:

Fox Float Factory

Rear Travel:

114mm

Fork:

Fox 34 Factory

Front Travel:

140mm

Headset:

Cane Creek 40 inset taper

Shifters:

SRAM X01 Eagle 12-speed

Front Derailleur:

n/a

Rear Derailleur:

SRAM X01 Eagle 12-speed

Crankset:

30t, SRAM X01 Eagle Carbon 12-speed

Bottom Bracket:

SRAM GXP BB92

Cassette:

10 – 50t SRAM 1295 Eagle 12-speed

Chain:

SRAM Eagle 12-speed

Brakeset:

SRAM Guide RS

Brake Type:

hydraulic disc

Rotors:

[front] 180mm, SRAM Centerline, [rear] 160mm, SRAM Centerline

Handlebar:

Yeti Carbon

Handlebar Width:

740 mm

Grips:

Yeti lock-on

Stem:

Easton Haven

Stem Length:

55mm

Saddle:

Yeti WTB Custom

Seatpost:

Race Face Turbine Dropper

Seatpost Diameter:

30.9mm

Wheelset:

DT Swiss W/XM421 Boost

Hubs:

DT Swiss 350

Front Axle:

15 x 110mm Boost thru-axle

Rear Axle:

12 x 148mm Boost thru-axle

Tires:

Maxxis Ardent EXO Tubeless

Tire Size:

[front] 29, x 2.4in, [rear] 29, x 2.25in

Claimed Weight:

27.2lb

Recommended Use:

cross-country

Manufacturer Warranty:

5 years limited on frame

 

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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