The Arch MK4 is the wheelset a lot of us here at Stan's choose to ride. All-mountain, Downcountry, Trailduro—whatever they're calling it this week, when you like pushing your limits on climbs, descents, and every kind of trail, this is your wheelset.

The Arch MK4's 28mm internal width and patented lightweight, low-profile design is not afraid to climb, while being an absolute monster on the descents. With a welded seam, reinforced spoke bed, and durable 6069 aluminum construction, the Arch MK4 rims give you the confidence to ride everything. When it comes to a consistent and reliable airtight tubeless seal, nothing beats Stan's patented Bead Socket Technology. The Arch MK4 rims feature an asymmetric design with offset spoke holes to improve spoke angle and create a stronger all-around wheel. Unlike most asymmetric rims that suffer from difficult inflation and poor tubeless performance, Stan's BST-Asymmetric design delivers all the advantages of a stronger wheel, with no compromises in tubeless performance. Nobody likes downtime, so the Arch MK4 wheelset is built with traditional J-bend spokes based on their proven strength, ride quality, and easy serviceability. Stan's has always made it easy to find replacement spokes should you ever damage your wheel, and now we've made it even easier. MK4 front and rear wheels of the same diameter all use the exact same very common spoke length, both sides, front and rear. Serviceability doesn't get any easier than that.

From the first click of the incredible M-pulse hubs, it's clear that confidence is the philosophy behind every part of this wheelset. Designed and CNC machined by Project321 in Bend, Oregon, M-pulse freehubs feature 6 pawls with Neodymium magnets that lock into place with greater force than conventional pawl springs, but offer virtually no resistance when coasting. Multiple teeth on each pawl offer better load distribution for years of trouble-free riding, and the angle of the pawls was engineered to transfer stress away from the rotating bearings, decreasing stress and wear on the entire freehub. That durability extends to the 17mm axles machined of 7075 aluminum and the full complement of Enduro brand bearings, including a double-row freehub bearing. M-pulse internals are also fully shielded inside the hub, because the only thing better than a good bearing seal is a good bearing seal most dirt can't even reach. As durable as they are, these hubs are also built for speed. M-pulse hubs engage with only 1.66°of rotation, putting down power nearly instantaneously, but how smooth these hubs roll is what really stands out. Adjustable preload allows you to fine tune M-pulse hubs for reduced friction, and less drag means more speed on the ground.The result is a bombproof hub with quick, consistent engagement and less resistance for more speed.

Available with Shimano Micro Spline, HG, or SRAM XDR freehub, and 6-bolt or Centerlock brake style, with options to fit all popular axle configurations.Tubeless ready with rim tape installed.

The Arch MK4 is our most versatile wheelset, and the best aluminum wheelset available for riders who want to push limits on every trail. Up, down, and wherever the ride takes you, the Arch MK4 wheelset has it under control.

FEATURES

• Versatile 28mm internal rim width optimized for 2.2-2.5” tires

• Light and durable 6069 aluminum with welded joint and reinforced spoke bed

• BST-Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build

• M-pulse ultra-low drag magnetic pawl adjustable hubs with 1.66° engagement

• Enduro bearings with double-row freehub bearing

• Matched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceability

• Connection program includes 5-year hub Warranty, 3-year rim Warranty, 1-year crash replacement, and $10 donation to trail maintenance or advocacy group of your choice

3-YEAR ALUMINUM RIM Warranty AND CRASH REPLACEMENT POLICY

3-YEAR ALUMINUM RIM Warranty:
Stan’s MK4, S2, and EX3 series aluminum rims are covered under a 3-year Warranty against manufacturing defects from the original purchase date. Warranty does not cover abuse, misuse, consequential damages, normal wear and tear, damage resulting from crashes, or improper installation. Warranties only apply to the original owner. If a product is found to be defective, a free repair or replacement will be provided at the sole discretion of Stan’s. Purchases made through unauthorized resellers such as eBay, Alibaba, Amazon or similar resale sites are not supported under our Warranty policy.

ALUMINUM RIM Warranty PROCESS:

1. Retain a copy of the original proof of purchase (i.e. Itemized receipt or invoice)
2. Submit your claim via an authorized Stan’s dealer with your proof of purchase or contact us at Warranty@notubes.com with a description of your issue, a photo that helps illustrate the issue, and your proof of purchase
   Note: For Warranty and crash replacement inquires outside the United States, please contact your local dealer or distributor
3. The dealer will contact Stan’s or the local distributor and arrange for repair/replacement, or, if you’ve contacted us directly, we will work quickly to reply to your email with instructions
4. If you have contacted Stan’s directly regarding a wheelset Warranty, and your approved request requires a return, Stan’s will provide you with a shipping label for return, free labor for your wheel rebuild, and return shipping

1-YEAR ALUMINUM RIM CRASH REPLACEMENT:
Should you have the unfortunate experience of crashing and damaging your Stan’s aluminum rims, we want nothing more than to help you get back on the bike as quickly as possible. The Crash Replacement Policy covers the rims for a period of 1 year from the original purchase date against damage caused during normal operation of the bicycle, including racing. Crash replacement aluminum rim pricing is 50% off the MSRP of the exact or comparable product at the time of the claim. If necessary, spokes, nipples, tape, and costs associated with any build labor performed by Stan’s will be provided at a discount.

ALUMINUM RIM CRASH REPLACEMENT PROCESS:

1. Retain a copy of original proof of purchase (i.e. Itemized receipt or invoice)
   Note: Reply to the registration confirmation email with a picture or scan of your receipt and we’ll keep it on file for you in the event of a future claim
2. Submit your request via an authorized Stan’s dealer with your proof of purchase or contact us at Warranty@notubes.com with a description of your issue, a photo that helps illustrate the issue, and your proof of purchase
   Note: For Warranty and crash replacement inquires outside the United States, please contact your local dealer or distributor
3. The dealer will contact Stan’s or the local distributor and arrange for repair/replacement, or, if you’ve contacted us directly, we will work quickly to reply to your email with instructions
4. If you have contacted Stan’s directly regarding crash replacement and your request has been approved you will be charged crash replacement pricing for your product and standard return shipping fees.

ALUMINUM RIM Warranty AND CRASH REPLACEMENT CONDITIONS:

1. Warranty and crash replacement are valid only for the original owner and are not transferrable.
2. Warranty does not cover the following:
   a. Damage sustained during shipment
   b. Products on which serial numbers, production lot codes/date codes or other identifying marks have been removed
   c. Normal wear and tear, misuse, incorrect installation or improper maintenance, use of incompatible parts or components, accident or crash damage, negligence, modifications not recommended or approved by Stan’s
   d. Labor costs for work not performed by Stan’s
   e. Shipping costs to Stan’s or local distributor
   f. Instances determined to be cosmetic only
   g. Any representation or Warranty expressed or implied by a third party beyond the provisions of this stated policy
   h. Purchases made through unauthorized resellers such as eBay, Alibaba, Amazon or similar resale sites
3. Crash replacement does not cover the following:
   a. Normal wear and tear expected with the use of high-quality mountain bike components
   b. Products on which the serial numbers, production lot codes or other identifying marks have been removed
   c. Misuse, incorrect installation or improper maintenance, use of incompatible parts or components, negligence, modifications not recommended or approved by Stan’s
   d. Instances determined to be cosmetic only
   e. Shipping costs to or from Stan’s or the local distributor
   f. Labor costs associated with removing the wheels and any associated components including but not limited to rotors, tires, cassette, computer magnets, etc. from the bicycle or wheel

M-PULSE HUB Warranty POLICY

M-PULSE 5-YEAR HUB Warranty:
Stan’s M-pulse hubs are covered by a 5-year Warranty against manufacturing defects. Warranty does not cover abuse, misuse, consequential damage resulting from lack of or improper maintenance, normal wear and tear, and improper installation. Warranties only apply to the original owner with valid sales receipt. If a product is found to be defective, a free repair or replacement will be provided at the sole discretion of Stan’s.

HUB Warranty PROCESS:

1. Retain a copy of the original proof of purchase (i.e. Itemized receipt or invoice)
2. Submit your claim via an authorized Stan’s dealer with your proof of purchase or contact us at Warranty@notubes.com with a description of your issue, a photo that helps illustrate the issue, and your proof of purchase
   Note: For Warranty and crash replacement inquires outside the United States, please contact your local dealer or distributor
3. The dealer will contact Stan’s or the local distributor and arrange for repair/replacement, or, if you’ve contacted us directly, we will work quickly to reply to your email with instructions
4. If you have contacted Stan’s directly regarding a wheelset Warranty, and your approved request requires a return, Stan’s will provide you with a shipping label for return, free labor for your wheel rebuild, and return shipping

HUB Warranty CONDITIONS:

1. Warranty is valid only for the original owner and is not transferrable.
2. Warranty does not cover the following:
   a. Damage sustained during shipment
   b. Products on which serial numbers, production lot codes/date codes or other identifying marks have been removed
   c. Normal wear and tear, misuse, incorrect installation or improper maintenance, use of incompatible parts or components, accident or crash damage, negligence, modifications not recommended or approved by Stan’s
   d. Labor costs for work not performed by Stan’s
   e. Shipping costs to Stan’s or local distributor
   f. Instances determined to be cosmetic only
   g. Any representation or Warranty expressed or implied by a third party beyond the provisions of this stated policy