WTB goes wide with latest Ci31 carbon rims

31mm internal width hoops built for tackling technical terrain

27.5 29er All Mountain Trail News Wheels
The Ci31 is WTB’s answer to all mountain and enduro riding.

The Ci31 is WTB’s answer to all mountain and enduro riding.

WTB has been dabbling in carbon rims for the past year, but their first forays were designed for cross country riding or drop bar exploration. Their newest product is the Ci31 (carbon internal width 31mm) and is built for tackling technical terrain.

The rims have a 31mm internal diameter and a 39mm outer.

The rims have a 31mm internal diameter and a 39mm outer.

The rims are TCS compatible and designed to pair with all tubeless tires designed to meet ETRTO standards. That means the tires should inflate tubeless with just a floor pump.

Drilling the spokes at an angle allows WTB to reduce stress at the nipple/rim interface.

Drilling the spokes at an angle allows WTB to reduce stress at the nipple-rim interface.

Other features includes WTB’s 4D drilling, which drills the spoke holes at an angle so that the nipples are aligned with the spokes under tension. This reduces binding and lateral movement at the nipple-rim interface to help improve durability and strength.

The 29” version weighs 35g more than it’s 27.5” counterpart.

The 29er version weighs 35 grams more than its 27.5 counterpart.

The WTB Ci31 comes in two sizes. The 27.5 rim weighs 455 grams, while the 29er weighs 490 grams. Retail for a rim is $600, which sounds like a bargain when you consider some other more well known carbon wheel maker’s rims sell for nearly $1000.

For more info, Visit www.wtb.com.

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  • BlackBean says:

    $600 for a RIM! ONE. RIM!!! I had a 29er wheel SET with DTSwiss 240 hubs and spokes and Stans EX rims built for around d$900. These wheels are as true as the day I got them, 4 years ago and the hubs have been flawless. 2/3 of that price for ONE RIM is a bargain?????

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