XC swiftness with a rowdy trail personality.
Yeti's faithful fans know that a short-travel 29er isn't unprecedented in their line, seeing the previous ASR Carbon occupied this same genre, offering cross-country racers the efficiency to blow the doors off the competition, but with a rowdy alter ego that made it far more capable than its limited travel figures would suggest. As such, you'll find Yeti created the SB100 GX Eagle Comp Complete Mountain Bike to fill the void left by the previous ASR Carbon, but with updated geometry figures to make it far more confident over technical sections of trail. It features a compact version of Yeti's Switch Infinity suspension platform packing 100 millimeters of efficient travel that excels on climbs and across longer distances seen during multi-stage XC races, such as the BC Bike Race or Downieville Classic.
We typically think of cross-country bikes as one trick ponies that barely trouble the scale which makes going uphill less of a chore, but the sometimes anorexic build can be slightly unnerving and requires a good test of faith when pushed through its paces on technical descents. With the SB100, it has some pretty good lineage to draw inspiration from and even though the geometry and suspension have cross-country riding and racing on its mind as the intended purpose, it's hard not to notice the trail and enduro highlights that bled over from Yeti's long-travel offerings.
The Switch Infinity platform, utilized on all Yetis all the way up to the EWS-winning SB6, has been redesigned specifically for 100mm of travel on this model. It’s light and tucks behind the seat tube, sitting in its own compartment out of the way of wheel spray and errant trail debris. This design also allows the front triangle to accommodate a large water bottle—the first we've seen from a Switch Infinity bike. We feel like this is a move in the right direction, even if it does come with a few added grams over the ASR's single pivot design, as every Yeti we've ridden with Switch has awesome climbing efficiency without infringing on its descending prowess. Yeti gets high marks for creating a very capable 100 millimeter travel bike, with a stiff and responsive ride that rarely feels out of place, short of trails where we'd don body armor and a full-face. Beefy pivots offer incredible lateral stiffness that tracks so confidently through blown out washboard trails and minefields that, in the back of our minds we have to remind ourselves that we are pointing and shooting on an XC bike. The Switch platform on this frameset operates in the same manner as on Yeti's other bikes—meaning supple off the top while transitioning into excellent mid-stroke support before ramping up as you test all 100 millimeters on offer. Pair this action with the silky-smooth FOX DPS Factory shock and you'll swear that the rear end is packing more travel.
The brief exodus from the XC scene allowed for a few reboots and allowed Yeti to truly build a no-compromise bike that could climb and descend, not just one that was great at one and mediocre at the other. A 67.8-degree headtube angle might look more appropriate on a trail bike and on paper it would appear that it would detract from the nimble handling and quick steering XC bikes are known for. Yeti has a few tricks up its sleeve and spec'd a FOX 34 Step-Cast fork with a 44mm offset. After a bit of experimentation, Yeti found this reduction in fork rake improves your weight distribution on the bike, offering a bit more downhill stability without compromising its ability to clean tight switchbacks on climbs and negotiate around trail obstacles at slower speeds.
The 74 to 74.3-degree seat tube angle (depending on size) puts you on top and in control of your bike and offer maximum pedaling efficiency for marathon 24-hour stretches or for those lucky enough to have the time off work, a stage race. The wheelbase also walks the tightrope of being nimble and offering stability so you can blitz through the techy bits without wondering if you'll blow it through the berm on the next turn. A departure from the ASR, this rear end is updated with Boost, which allows for wider hub flange spacing and better bracing angles to stiffen things up. It also allowed Yeti to hack off a little length on the chainstays and they now sit at 17.2-inches, so you have plenty of rear wheel traction for competent climbing while remaining agile through tight singletrack. Other notable frame features include internal tubed cable routing for silent operation and easy setup and an uninterrupted seat tube allowing for maximum dropper post compatibility.
This SB100 is built using Yeti's lower spec carbon, which offers nearly the same stiffness and strength as their top-flight TURQ carbon. The main difference between the two frame materials lies in its slightly heavier weight, with this particular SB100 frame weighing about 7.2 ounces heavier (that's approximately 205 grams) than TURQ carbon models. The payoff is a significantly cheaper price point, which helps you save funds for bike upgrades down the road, trips to iconic trail systems, or even fees to enter that multi-stage race you've been dreaming about for the past few years.
The suspension, as well as the Switch Infinity shuttles, come from FOX in the form of a Float Factory DPS shock and all new 120 millimeter Step-Cast 34 Performance Fork that pairs sculpted lowers with 34 millimeter stanchions for the best weight savings possible without sacrificing its ability to absorb bigger hits and tame rowdy sections of trail. Yeti didn't stop there in outfitting the bike appropriately for the terrain at hand, opting for properly wide 760-millimeter bars, beefier 2.3-inch tires, and FOX Transfer dropper post for getting aggressive on descents without sacrificing your pedaling position on long climbs.
This GX Eagle Comp build comes with carefully curated components chosen for a mix of cross-country racing and spirited trail riding. SRAM's workhorse GX/XO1 Eagle drivetrain offers plenty of range for taming the climbs on 5-digit elevation days while having a tall enough gear pedal on downhill sections of trail and link up paved roads between trail heads. It's finished with a dependably strong DT Swiss M1700 wheelset with 25 millimeter internal width, as well as tried-and-true Shimano XT brakes for powerful stopping force.
- Yeti reinstates XC speed with a rowdy trail alter ego
- 4in of smooth, highly efficient Switch Infinity suspension
- 67.8° head tube angle balances agility with trail composure
- Carbon frame is strong and stiff at a lower cost than TURQ
- SRAM's Eagle drivetrain with a mix of GX and XO1 components
- DT Swiss M1700 wheels for reliability and optimal tire support
- Beefy 2.3 in tires, dropper post, 34mm fork for aggressive riders