Project 321 G3 + Stan's No Tubes Arch Mk4 Custom Alloy Wheels (Front+Rear)

Project 321 G3 + Stan's No Tubes Arch Mk4 Custom Alloy Wheels (Front+Rear)

$1,234.00
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  • Free shipping on wheel orders in Canada and the US!
Our current build time is roughly one week if all the parts are in-stock. We keep a large inventory of hubs, rims, and spokes on hand, but some items may need to be ordered in and can have a longer lead time. Please reach out to us to confirm part availability / time frame over here:

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Project321 Hubs:

Projects 321's approach with G3 was to build a hub that strikes the ideal balance between strength, weight, reliability, and efficiency. The result of this design philosophy is a robust and efficient hub set with instant, rock-solid engagement.

Instant, Rock-Solid Engagement
1.25° / 288 Points of Engagement (POE)
Magnetic Glide Technology
Magnetically actuated pawls minimize drag while coasting
Patent Pending 6-Lock Technology
Easily converts from six bolt to Center Lock

Stan's No Tubes Arch Mk4 Rims:

Mountain bikes have changed in the decade since the original Arch rim helped introduce the world to tubeless technology. With a 28mm wide asymmetric rim shape and ultra-strong 6069 alloy, today's Arch MK4 rim has evolved to match these more capable bikes. Through all the years of testing and refinement of this rim, one thing has never changed: versatility. Now more than ever, when you want a reliable rim that can handle every trail, the Arch MK4 is for you.

The Arch MK4 rim is light enough to take XC racing but was born from research and testing on the Enduro World Series circuit, making it a great rim for anyone looking to improve both descending and climbing. Constructed of light and strong 6069 aluminum alloy, with a reinforced spoke bed and 28mm internal width ideal for 2.2-2.5" tires, the Arch MK4 can get you up the climbs easier and make the descent even better.

The Arch MK4's BST-Asymmetric shape improves spoke angle, allowing for a stronger overall wheel build. Unlike most asymmetric rims that struggle with tubeless inflation and consistent airtight seal under hard cornering, the Arch MK4's shape is designed to equalize pressure for easy inflation and incredibly strong tire retention on both sides of the rim.

Stan's patented Bead Socket Technology, combined with a stronger asymmetric design, light and durable 6069 alloy, and the perfect rim width for balancing control and weight, make the Arch MK4 your best choice for all-around riding. Powering up rocky switchback climbs or slapping berms on every descent, the Arch MK4 is ready for whatever you can throw at it.