Specialized Fuse Expert Carbon 6Fattie review
Specialized added a carbon frame Fuse to its trail hardtail lineup for 2017. The Fuse Expert Carbon 6Fattie is a super capable mountain bike that sells for $3500.
Lowdown: Specialized Fuse Expert Carbon 6Fattie
Hardtails aren’t dead. Not by a long shot. Specialized’s new Fuse Expert Carbon 6Fattie proves that handily thanks to its fun geometry, excellent parts spec, and agreeable price point.
| Frame: Specialized FACT 10m carbon | Bars: 750mm Specialized Trail alloy |
| Fork: Fox Rhythm FLOAT 34 | Stem: Specialized Trail, 3D forged alloy |
| Wheels: Roval Traverse hookless alloy | Grips: Specialized Sip Grip |
| Hub spacing: 110×15, 148x12mm | Seatpost: Specialized Command Post IRcc |
| Tires: Specialized Purgatory/Ground Control | Saddle: Specialized Henge Comp |
| Brakes: SRAM Guide R | Headtube angle: 67.5 degrees |
| Rotors: 200mm front/180mm rear | Chainstay length: 430mm |
| Shifters: SRAM GX, 11-speed | Seat tube angle: 73 degrees |
| Front derailleur: N/A | BB drop: 51mm |
| Rear derailleur: SRAM X1 | Wheelbase: 1164mm |
| Cable routing: internal | Sizes: S, M, L, XL |
| Crankset: Race Face Turbine Cinch 28t | Colors: Black/Charcoal/Red, Red/Black |
| Bottom bracket: Race Face threaded | Weight: 27.9 pounds, no pedals |
| Cassette: SRAM XG-1175 10-42T | Price: $3500 |
| Chain: SRAM PC-1130 |
Rating:  4 out of 5 |
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Review: Specialized Fuse Expert Carbon 6Fattie
When I sold a well-loved Kona aluminum hardtail four years ago I told myself that I’d never own a hardtail again. But Specialized’s Fuse Expert Carbon 6Fattie has me rethinking that pact. While the jury seems to still be out on the 27.5+ wheel platform, I’m a big fan and I must say that it makes the idea of a hardtail more alluring than ever before, especially if you’re on a budget and looking for a fun, maintenance-minimal mountain bike. The Fuse Expert Carbon has a super playful geometry and reliable, economical parts.
The Fuse is an exceptionally fun bike that delivers without a huge outlay of cash. Hardtails like the Fuse are becoming more relevant than ever thanks to modern geometry, plus-size tires, and dropper posts.
After recently riding mostly full suspension trail bikes, getting on the Fuse took less adjustment that I expected. Much of this is due to the modern trail geometry. The head tube angle of 67.5 degrees is the same figure as many of my current favorite bikes. Other welcome features included 120mm of front-end travel handled by Fox’s new OE-only 34 Rhythm fork and Specialized’s Command Post dropper with 125mm of travel.
The surefootedness of the 3.0” Specialized Purgatory and Ground Control tires also encouraged the Fuse rider to blast through rough sections, floating above smaller crevices. And while not super wide, the 750mm bars, 70mm stem, and 25” top tube on the size large combined to give the Fuse a fun, rowdy feel.
The Command Post is controlled by a 1x specific lever positioned in the location of a front shifter.
I loved riding the Fuse on many trails that I would normally only tackle aboard a full suspension bike. While it certainly isn’t super light at 28 pounds with pedals, the Fuse still loved to stomp up techy climbs and bomb back down the other side. Not worrying about rear suspension settings and instead dialing in tire pressures was a treat, allowing me to focus on the fun of mountain biking.
The Frame
One of the beauties of any hardtail is that it should be fairly lightweight. While the aluminum Fuse models don’t have a reputation for being overweight, adding a carbon frame version is a smart play. This drops weight and can conceivably add to the frame’s performance, increasing bottom bracket rigidity and rear end compliance. In the case of the Fuse is also provides an opportunity for internal storage inside the frame via Specialized’s SWAT system. Tucking an inner tube inside the downtube keeps it low and helps avoid the need for a seat bag or hydration pack.
Not only does the Fuse offer big fun, it’s also well designed thanks to a threaded bottom bracket (left). As part of Specialized’s SWAT system, the top cap houses a quick link and chain tool (right).
The Fuse carbon frame also looks good, with clean, efficient lines. It has no provision for a front derailleur, but this won’t bother most. Where the Fuse carbon frame really deserves accolades is its threaded 73mm bottom bracket. It’s been said widely and often, but I feel it’s worth repeating: we all want threaded bottom brackets! They rarely creak and they’re so much easier to work on.
As you’d expect the Fuse Expert Carbon uses boost spacing to help keep the rear end short and still clear large tires. If you’re interested in a lighter setup throw on a set of 29er wheels. In fact, Specialized includes measurements for the Fuse in 29er attire in its online geometry chart.
The Fuse Expert Carbon comes with a bottle cage that mounts to the SWAT internal storage cover (left). Removing the cover is a tool-free matter, and inside Specialized placed an inner tube inside a cloth wrap with a pull tab (right).
A hardtail frame also opens up space for water bottles. On the size large Mtbr tested, two large water bottles fit easily, helping me routinely forego a hydration pack. The bike comes with one cage and it’s a good one, the Specialized’s Zee Cage that holds bottles over the roughest terrain without worry.
Internal cable and hose routing looks great even if it does create a bit more work for mechanics (left). The Fuse has no provisions for running a front derailleur, be it does have a mount on the seat tube or a port for running a cable (right).
All cable and hose routing on the Fuse is internal, entering at the junction of the headtube and downtube. While this is a mild inconvenience for mechanics, the clean look is appreciated.
The Build
There is very little that I would change with regards to the parts Specialized selected for the Fuse. I rode it bone stock, liking even the Henge Comp saddle. But the parts spec is what adds to the heft of the Fuse Expert Carbon. The trade-off is what I consider a great deal at $3500.
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