The Sun Helix series rims offer the performance and tubeless ready function of higher end rims, but at an attainable price point. The Helix 29 has a 25.5mm tubeless ready inner profile, (comes with tape + valves installed), and offers an immense amount of rim strength given its rim weight, (540g). These rims are super strong, stiff laterally, (thanks to it's 21.5mm tall profile height), and will work for a wide range of riding. They're not the lightest XC rim, obviously, but there's a strong chance that they are still lighter weight, wider, and stronger than most OE rims used for new bike wheel builds. But the Helix 29 is also strong enough to carry over into Downhill riding. So if you ride aggressive, on fast descents, the Helix 29 will hold up.
You have the choice to go with Shimano XT centerlock or 6 Bolt loose ball bearing, cup+cone disc hubs, or upgrade a few notches with Speed Tuned D MTB sealed cartridge bearing disc hubs, (QR and TA, Shimano and XD available).
In "stock" form, these wheels are built with DT Swiss black stainless steel 2.0mm (14g) J-bend spokes in a 32 hole, three cross configuration front and rear. These spokes are an upgrade over most "new bike" spokes. Small details make big differences with regards to spoke wire, and even though there are lighter weight spoke options available, these straight gauge spokes still feature top quality stainless, with a precise finish that allows for precise wheel building. That being said, there is a spoke upgrade option available, DT Swiss Competition Double Butted 2.0/1.8/2.0 black spokes. DT "Comp" spokes offer legendary quality and performance. Even if you didn't know a thing about spokes, if you select this option, know that your wheels would come with a super top notch spoke product. Selecting "Comp" spokes and Alloy nipples will shave off approximately 80 - 85g from the wheel set.
-Comes with tubeless tape & valves installed.
-The Sun Helix 29 (sleeved joint) 27.5 (650b) disc rim has a 25.5mm tubeless ready inner width, is 21.5mm tall, 29.5mm wide, features single stainless eyelets, and weighs about 540g
-Recommended for use with 27.5 x 2.1 - 2.5" tires
-Wheel set weight with QR Shimano XT 6 bolt disc hubs and brass nipples is approximately 2250g (Black stainless w/ brass) or 2160g (Competition w/ Alloy); with Speed Tuned D MTB 15/142TA hubs (XD driver) the wheel set weight is approximately 2145g (Black stainless w/ brass) or 2060g (Competition w/ Alloy). Wheel set weight will vary with end caps, freehub driver, spoke, and nipple selection. Tape + Valves comes installed and adds approximately 35g for the wheel set, on average.