Frameset
Frame
Ari Racing Design Fat King Carbon V3, full carbon construction, 197x12mm rear axle, 100mm english thread BB, tapered headtube, internal cable routing
Fork
Ari Racing Design Kings Peak Carbon V3, tapered, 150x15mm thru axle
Kings Peak Comp
The Ari Kings Peak is a full-carbon fat bike built to handle soft winter conditions and loaded backcountry travel without abandoning the handling traits of a modern mountain bike. Moving away from the steep, upright posture of traditional snow cruisers, Ari designed this frame to feel familiar to riders accustomed to contemporary trail bikes. It relies on massive 27.5-inch wheels and 4.5-inch tires to provide flotation over snow and sand, while the rigid carbon chassis keeps the overall weight manageable for long days in the saddle.
Designed with utility in mind, the frameset is heavily equipped for bikepacking. With multiple cargo mounts across the front triangle and fork legs, it easily transitions from a stripped-down winter training tool to a heavy-duty expedition rig. It suits riders who want a highly capable, progressive platform for foul-weather riding and remote exploration.
$2,599ARI1631BGen Current
Build
Size
| Stack | 615mm |
| Reach | 450mm |
| Top tube | 614mm |
| Headtube length | 100mm |
| Standover height | 750mm |
| Seat tube length | 440mm |
Fit and geometry
The Kings Peak utilizes a progressive geometry blueprint that heavily influences its trail manners. A slack head tube angle pushes the front wheel further out, which directly contributes to the bike's stability on fast descents and rough, unpredictable snowpack. Paired with a generous reach and a relatively long wheelbase, this layout gives the rider a centered, balanced stance rather than pitching their weight over the front axle.
To maintain climbing efficiency, Ari pairs that slack front end with a steep seat tube angle. This positions the rider directly over the bottom bracket, ensuring efficient power transfer and keeping the front wheel grounded on steep, loose pitches. The chainstays are kept moderate—long enough to clear massive tires and maintain traction, but short enough to prevent the rear end from feeling entirely disconnected in corners.
Riders coming from standard mountain bikes should anticipate a wide Q-factor. The crank width is necessarily broad to accommodate the rear tire clearance, which alters pedaling ergonomics and may require a brief adjustment period during longer rides.
Full specs
Groupset
Shift levers
Shimano SLX Trigger 12-Speed
Rear derailleur
Shimano SLX SGS 12-Speed
Cassette
SLX M7100, 10-51t, 12-speed
Chain
Shimano SLX 12-speed
Crankset
Samox TAM38, for Fat Bike, Samox 28T
Bottom bracket
Samox BSA EB2403BB 100
Front brake
Tektro HD-M275 Hydraulic
Rear brake
Tektro HD-M275 Hydraulic
Front rotor
180mm
Rear rotor
160mm
Wheelset
Front wheel
WTB ST i76 76mm, 32 hole, 27.5; Sun Ringlé SRC 150x15; Sha-Dar 14G, Stainless
Rear wheel
WTB ST i76 76mm, 32 hole, 27.5; Sun Ringlé SRC 197x12, Microspline; Sha-Dar 14G, Stainless
Front tire
WTB Bailiff TCS Light/High Grip, 27.5x4.5 Tubeless Ready
Rear tire
WTB Bailiff TCS Light/High Grip, 27.5x4.5 Tubeless Ready
Cockpit
Stem
Ari Alloy, 31.8mm
Handlebars
Ari Racing Design Alloy Riser Bar, 31.8mm x 780mm, 25mm Rise
Saddle
WTB Volt Comp
Seatpost
TranzX JD-YSI05J w/ Travel Adj. 30mm, Dropper
Grips
Velo MTB grip, black, double density Kraton
Builds
The Kings Peak lineup is split into two builds that share the same full-carbon frame and rigid carbon fork. Both models utilize a reliable 100mm English threaded bottom bracket, internal cable routing, and a highly capable 27.5-inch wheelset wrapped in 4.5-inch WTB Bailiff tubeless-ready tires.
The entry-point Comp build focuses on functional reliability, utilizing a Shimano SLX 12-speed drivetrain and Tektro hydraulic disc brakes. This configuration provides a massive gear range for grinding through soft snow, keeping the price accessible without compromising the core ride quality.
Stepping up to the Elite build introduces a SRAM GX Eagle 12-speed drivetrain and TRP Trail EVO brakes. This tier is aimed at riders who want crisper shifting under load and more refined braking power for steeper terrain. Both builds feature an alloy cockpit and a TranzX dropper post, ensuring the bike is ready for varied topography straight out of the box. The value across both options is anchored by the high-quality carbon frameset, which offers a lighter starting point than many aluminum competitors in the same price bracket.
Comp
$2,599
ARI1631BSelected
Elite
$2,999
ARI1632B
Reviews
Critics consistently praise the Kings Peak for bridging the gap between a dedicated snow machine and a standard trail bike. By stretching the wheelbase and slackening the front end, Ari has created a platform that feels "calmer and more composed" (Outdoorgearlab) on descents than older, steeper fat bike designs. Testers noted that this stability is especially valuable when navigating rutted, frozen trails or when the bike "transitioned seamlessly between dirt and snow surfaces" (GearJunkie) during shoulder-season rides.
While the rigid carbon frame transfers some trail feedback, reviewers found the ride surprisingly comfortable. The massive air volume of the 4.5-inch tires acts as the primary suspension, effectively muting high-frequency chatter from boot tracks and icy crust. Despite the large footprint, the bike avoids feeling sluggish on the climbs. Testers highlighted that the relatively low frame weight keeps the bike feeling "snappy and responsive under pedaling power" (Outdoorgearlab), making long winter efforts less draining.
The primary handling tradeoff noted by reviewers is a slight reduction in low-speed maneuverability. The longer footprint requires a bit more steering input in tight uphill switchbacks. However, testers generally agreed this is a minor compromise given the bike's excellent high-speed stability and predictable traction across varied terrain.
