Carbon · Fat-Tire · 27.5 Fat
For The Extremes.
For The Extremes
Adventure's best friend. Conquer any terrain with the Kings Peak's 27.5 x 4.5 tire clearance. The larger wheels and tires provide a stable and capable ride, allowing you to roll smoothly over loose and soft terrain and have maximum grip on rough and rocky trails.
The Kings Peak features a full carbon frame and fork which is not only lightweight but also provides the strength and durability needed to conquer various terrain. Our MonoForm frame construction sets the foundation for a high-performance fat bike designed to handle the toughest conditions.
Experience the King Peak's progressive frame geometry for the most demanding adventures. The stable 67-degree head tube angle enhances control, offering a confident ride over diverse landscapes. Coupled with a comfortable 75-degree seat tube angle that helps you pedal efficiently and powerfully. The low standover height accommodates riders of all sizes, and the design allows for longer dropper seat posts.
Gear up for any adventure with the Kings Peak's impressive 19 mounting points. Carry all your essential gear, tools, and water easily. All the mounts ensure you're well-equipped for extended rides, bikepacking trips, or any adventure that demands extra storage.
In the press
01 / 02
"OutdoorGearLab’s 2026 mountain-bike guide names it the best fat bike."
OutdoorGearLab’s 2026 fat-bike guide names the Ari Kings Peak Comp the best fat bike for aggressive riders, pointing to the reasonable price, modern geometry, and loads of frame and fork mounts.
Frame
Enjoy no chain slap noise and the UDH (Universal Derailleur Hanger) system, ensuring easy serviceability no matter where you are.
Chassis
Custom-molded protection quiets chain slap and shields high-impact areas. UDH compatibility simplifies service, while the epoxy-infused finish is made to resist chips and scratches.
Watch
From winter crossings to summer adventures, the Kings Peak has proven its mettle, demonstrating durability, performance, and the ability to handle the toughest challenges.
Colorways
Complete builds are available in Galaxy Purple Metallic and White Black. Additional frame-only finishes are available in Small. Choose your build, color, size, and setup in the configurator.
Studio
The details that define the ride.
Configuration
Every build shares the same Kings Peak frame and ride character. Choose the component level, then configure size, color, custom setup, and upgrades.
Build specifications
| Component | Comp | Elite | Frame |
|---|---|---|---|
| Chassis & suspension | |||
| Frame | Ari Racing Design Fat King Carbon V3, full carbon construction, 197x12mm rear axle, 100mm english thread BB, tapered headtube, internal cable routing | Ari Racing Design Fat King Carbon V3, full carbon construction, 197x12mm rear axle, 100mm english thread BB, tapered headtube, internal cable routing | 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 | Ari Racing Design Kings Peak Carbon V3, tapered, 150x15mm thru axle | Ari Racing Design Kings Peak Carbon V3, tapered, 150x15mm thru axle |
| Rear shock | N/A | N/A | N/A |
| Sizes | S,M,L,XL | S,M,L,XL | S,M,L,XL |
| Drivetrain & brakes | |||
| Drivetrain | Shimano Deore M6200, 12-Speed | Shimano XT M8200 Mechanical, 12-Speed | N/A |
| Brakes | Tektro HD-M280 Hydraulic 180/160mm Rotors | TRP EVO Expert, 180/160mm Rotors | N/A |
| Shifters | Shimano Deore M6200, 12-Speed | Shimano XT M8200, 12-Speed | N/A |
| Rear derailleur | Shimano Deore M7200, 12-Speed | Shimano XT M8200, 12-Speed | N/A |
| Cassette | Shimano CS-M6200, 10-51T, 12-Speed | Shimano XT M8200, 10-51T, 12-Speed | N/A |
| Crank | Raceface Ride, for Fat Bike | Raceface Turbine, for Fat Bike | N/A |
| Chainrings | Raceface DM 30t | Raceface DM 30t | N/A |
| Bottom bracket | Raceface X-Type, 100mm | Raceface BSA, 100mm | N/A |
| Chain | Shimano CN-M6100 12-Speed | Shimano XT M8100, 12-Speed | N/A |
| Cockpit & contact points | |||
| Handlebars | Ari Racing Design Alloy Riser Bar, 31.8mm x 780mm, 25mm Rise (customized sizing through Ari Custom Setup) | Ari Racing Design Alloy Riser Bar, 31.8mm x 780mm, 25mm Rise (customized sizing through Ari Custom Setup) | N/A |
| Stem | Ari Alloy, 31.8mm (Size varies with Ari Custom Setup) | Ari Alloy, 31.8mm (Size varies with Ari Custom Setup) | N/A |
| Grips | ODI Elite Pro | ODI Elite Pro | N/A |
| Saddle | WTB Volt Comp | WTB Volt Comp | N/A |
| Seatpost | TranzX JD-YSI63FL1 w/ Travel Adj. 30mm, Dropper- customized sizing through Ari Custom Setup | TranzX JD-YSI63FL1 w/ Travel Adj. 30mm, Dropper- customized sizing through Ari Custom Setup | N/A |
| Pedals | Available Separately | Available Separately | Available Separately |
| Wheels & tires | |||
| Wheels | WTB ST i76 76mm, 32 hole, 27.5 | WTB ST i76 76mm, 32 hole, 27.5 | N/A |
| Rims | WTB ST i76 76mm, 32 hole, 27.5 | WTB ST i76 76mm, 32 hole, 27.5 | N/A |
| Hubs | Sun Ringlé SRC 197x12, 150x15, Microspline | Sun Ringlé SRC 197x12, 150x15, XD | N/A |
| Spokes | Sha-Dar 14G, Stainless | Sha-Dar 14G, Stainless | N/A |
| Tires | WTB Bailiff TCS Light/High Grip, 27.5x4.5 Tubeless Ready | WTB Bailiff TCS Light/High Grip, 27.5x4.5 Tubeless Ready | N/A |
| Tubes | 27.5x4.5 Presta Valve for Fat Bike, tubeless setup available after adding bike to cart | 27.5x4.5 Presta Valve for Fat Bike, tubeless setup available after adding bike to cart | N/A |
| Extras | N/A | N/A | N/A |
Specs are subject to change. Any substitutions will be comparable or better.
Fit & geometry
Compare every Kings Peak frame size. Measurements come directly from the same geometry metafield used on the bike comparison page.
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Top Tube | 590 | 614 | 637 | 660 |
| Seat Tube | 400 | 440 | 460 | 480 |
| Chainstay | 450 | 450 | 450 | 450 |
| Head Angle | 67° | 67° | 67° | 67° |
| Seat Angle (Effective) | 75° | 75° | 75° | 75° |
| Head Tube | 90 | 100 | 120 | 130 |
| Bottom Bracket Height | 325 | 325 | 325 | 325 |
| Bottom Bracket Drop | 65 | 65 | 65 | 65 |
| Wheelbase | 1156.9 | 1184.1 | 1208.3 | 1232.6 |
| Fork Offset | 51 | 51 | 51 | 51 |
| Fork Axle to Crown | 511 | 511 | 511 | 511 |
| Trail | 119 | 119 | 119 | 119 |
| Standover Height | 700 | 750 | 770 | 780 |
| Stack | 598 | 615 | 625 | 635 |
| Reach | 430 | 450 | 470 | 490 |
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Top Tube | 59.0 | 61.4 | 63.7 | 66.0 |
| Seat Tube | 40.0 | 44.0 | 46.0 | 48.0 |
| Chainstay | 45.0 | 45.0 | 45.0 | 45.0 |
| Head Angle | 67° | 67° | 67° | 67° |
| Seat Angle (Effective) | 75° | 75° | 75° | 75° |
| Head Tube | 9.0 | 10.0 | 12.0 | 13.0 |
| Bottom Bracket Height | 32.5 | 32.5 | 32.5 | 32.5 |
| Bottom Bracket Drop | 6.5 | 6.5 | 6.5 | 6.5 |
| Wheelbase | 115.7 | 118.4 | 120.8 | 123.3 |
| Fork Offset | 5.1 | 5.1 | 5.1 | 5.1 |
| Fork Axle to Crown | 51.1 | 51.1 | 51.1 | 51.1 |
| Trail | 11.9 | 11.9 | 11.9 | 11.9 |
| Standover Height | 70.0 | 75.0 | 77.0 | 78.0 |
| Stack | 59.8 | 61.5 | 62.5 | 63.5 |
| Reach | 43.0 | 45.0 | 47.0 | 49.0 |
Measurements are shown in the selected unit. Angle values remain in degrees.
Press reviews
Impressive quality for its price tag and solid on-trail performance to go with it.
The Loam Wolf
An extensive fit process before sending the bike so that it’s ready to rock.
Singletracks
A lot of value without resorting to common cost-cutting measures.
Bicycling
Customer reviews
Great purchase experience the staff assists with questions to help customize the bike to your fit. After that they provide you with text updates as your build out happens. Bike was packaged well and zero damage happened during transit. It only took me about 20 minutes to unpack and do the small amount of assembly. I didn't have to make any adjustments to the custom settings they did. Bike rides like a dream and I can't wait to ride it more.
Oh, and beautiful too! This bike not only looks great, it's a four-season machine that easily handles snow and mud. The geometry of the bike is very comfortable but still feels lively enough. The components are plenty modern but still practical and reasonably affordable. I find it easy to maintain which is important to me.
I picked up a 29" wheelset for narrower tires and between the two wheelsets, I literally have a go-anywhere, do-anything bike. Even though I ride every day, I still get off the bike each time and think: "Now THAT was fun."
New into fat biking and wanted a decent bike but nothing much over $2k, being unsure how much I would enjoy this foreign land of riding on snow trails. The geometry really shines on every kind of trail, from snow-covered bike paths to the groomed blue/black fat bike trails where I live. It's lively and stable, predictable and playful, handling just like a rigid modern mtn bike. SLX drivetrain has been solid, glad I put on a dropper, and the frame details are spot on--I like all the mounts for my bags. The bike feels like it can handle anything I put it through. I've been pleasantly surprised by the stopping power of the 2-pot Tektro brakes. It would be nice if they spec'd the builds with brakes the use DOT, but it's just a minor issue. The Colossus tires have great traction on cold packed snow but do break free pretty easily in wetter/warm snow. For the price, you would be hard-pressed to find a better winter ride with a nice carbon frame. I'm a convert.
I just spent three days on a backcountry bikepacking trip, and it was my first ride on this bike. I was initially worried about potential issues, but it performed flawlessly. In fact, all four of us were riding Kings Peaks, and none of us had a single problem. The bike felt like a machine—super comfortable, and it climbed and handled beautifully. I absolutely love it!
My new King's Peak is an outstanding Fat Tire ride. The geometry is what sold me on my purchase and it rides as advertised. I can easily loft my front wheel over obstacles. The ride is stable while also being extremely nimble through the techy bits. I made the request for studdable tires and the extra cost was worth every penny. The King's Peak is like a billy goat on steroids, it wants to roll over everything I toss at it. The staff at Fezzari were also top notch. The attention to detail and frequent updates on the progress of the bike build were welcomed. I would buy another Fezzari without any hesitation. One of the best buying experiences I have ever had.
Tech support
Specs and setup for your first ride and beyond. Every bike comes with support from our team in Utah.
Remove packaging foam and zip-ties. Confirm the small-parts box has pedals, thru-axle and multitool.
Center the bar, set roll, and tighten faceplate bolts evenly in a cross pattern.
Seat the rotor between the pads, insert the thru-axle from the non-drive side and close to spec.
With the dropper fully extended, set height so your knee is slightly bent at the bottom of the stroke.
Grease threads. The left pedal is reverse-threaded.
Set sag for your weight using your fork and shock manuals, then check tire pressure against the sidewall range.
Frame and Ari-supplied hardware. Numbers match the diagram.
Hangers, bearings, shock hardware, and the rest of the replacement parts for the Kings Peak are listed on the support page, with current stock.
Support
Still deciding? Our team rides these bikes and can help you find the right setup.
A rider who enjoys the Kings Peak is someone who values adventure and versatility in their cycling experiences, combined with a love for cutting-edge technology and materials. They are likely drawn to the unique capabilities that fat tire bikes offer, such as the ability to traverse a wide range of terrains that might be challenging or inaccessible with standard mountain bikes, including snow, sand, mud, and loose gravel.
Yes, at checkout there are several options available for financing.
Estimated lead times are listed under each model's size in the bike builder. Times may vary a little based on current conditions, frame size, color, and availability.
The contact patch of a 27.5x4.5” tire is larger than the contact patch of a 26x4.8” tire. This is due to the longer contact patch that happens with the larger diameter 27.5” tire. A longer contact patch will float better as well as roll faster. This helps when riding in snow, sand, or other soft trails conditions. The larger diameter helps you get over obstacles easier too.
100mm english thread BSA
197x12 rear hub spacing and 150x15 front hub spacing. Rear axle dimensions: TA12/224mm/M12xP1.0x20mm. Front axle dimensions: TA15/198mm/M15xP1.5x20mm.
The cables are routed internally through the frame from ports located near the headtube. The Fezzari Clean-catch cable guides hold the cables tight for a rattle free ride.
We recommend SRAM Fat 5 cranksets that feature a 76.5mm chainline and 208.5mm q-factor. The RaceFace Ride Cinch crankset will also work in the 190mm spindle configuration.
The max wheel and tire sizes are 26x5.0” and 27.5x4.5
Fat bikes can be run tubeless. It is a good idea to check with sealant manufacturers for their recommendations. We use Stan’s NoTubes sealant with great success in the cold.
ZS44/ZS56
All Ari bikes go through our <a href='https://aribikes.com/pages/custom-fit' target='_blank'>Custom Setup</a> process, making sure the bike is fit and tuned specifically to you. They are test-ridden before delivery. If your bike is shipped to you, it’s still tuned and ready to ride and requires just a few minutes of assembly.
You can work directly with us, one of our recommended shops, or work through your local shop.
Each frame comes with a <a href='https://aribikes.com/pages/warranty' target='_blank'>Lifetime Warranty</a>. Ari branded frames come with a <a href='https://aribikes.com/pages/warranty#transfer-form' target='_blank'>transferable warranty</a> as well.
It comes with a <a href='https://aribikes.com/pages/love-it-or-return-it' target='_blank'>30 Day Love it or Return it Guarantee</a>.
Ari branded frames come with a transferable frame warranty available to the second owner. The second owner can receive a one-year frame warranty from the date they purchase the bike from the original owner. Warranty only transfers once. All Ari bikes must have the transfer documented from the original owner to the new owner <a href='https://aribikes.com/pages/bike-registration' target='_blank'>here</a> in order to qualify for a transferable warranty.
