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Mercury Wheels
X1 Carbon 27.5in Wheelset

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Don't worry though, we have a lot more 27.5" Mountain Bike Wheels - Tubeless in stock than that.

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The stiffness.

Given that Mercury Wheels is located near our home office in Northern Utah, we often get the opportunity to spend a lot of quality time abusing its latest and greatest wheelsets before they even hit the market. The X1 Carbon 27.5in Wheelset is no exception. In the time we've been able to spend on it, we've constantly found ourselves returning to one word: Stiffness. They're responsive as hell on climbs, sure, but the rims really shine while tracking across terrain. Loose, chundery, crunchy — it doesn't matter. The X1 Carbon is so on-point that it actually inspired us to fiddle with our fork pressure in order to account for the added stiffness.


The rims are built with a hookless bead, which — contrary to what common sense might suggest — makes the rim-to-tire bead connection more reliable. Burping and tire blow-offs are actually more common with hooked rims, and the hookless models also demonstrate improved tire retention on-trail. By eliminating the ridge of material constituting the hook, hookless beads also enjoy increased structural integrity — a definite plus when you consider that the X1 Carbon is built for the big hits of enduro and all-mountain riding. We have found that mounting some tire brands can be a little tricky, but — once they're on — the bead holds a tubeless setup as steady as any other manufacturer's.


Finally, and you should brace yourself for this, those stiff, gorgeously branded carbon rims are laced to Mercury's own hubs by 28 spokes. Yeah: 28. We were surprised, too. Before we get into the details on the spoke count, it bears mentioning that the weight bearing threads are laced in a two-cross pattern, which further increases stiffness for sharper mashing and tracking. The rims are carbon, though, so stiffness is already guaranteed, which is one reason why we aren't sorry to trade the additional (and unnecessary) stiffness of a 32 spoke build for the lower weight of 28 spokes. The other reason is that fewer spoke holes mean less drilling and, ultimately, a more structurally sound rim.


Finally, note that the rims don't include tape or tubeless valves, but we've had luck installing most readily available tubeless conversion kits and wouldn't recommend running the X1 Carbon wheelset any other way.


Rim Material
carbon fiber
Wheel Size
27.5 in
Rim Depth
24 mm
Rim Width
[external] 32 mm, [internal] 26 mm
Brake Compatibility
6-bolt disc
Hubs
Mercury
Front Axle
15mm quick-release
Rear Axle
12 x 142mm thru-axle
Spokes
Sapim Race
Spoke Count
28 / 28
Wheel Bag Included
no
Claimed Weight
[complete set] 1,530 g
Manufacturer Warranty
2 years

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