Adaptive mountain bike company Bowhead Corp. makes its first foray into the world of everyday wheelchair components with the release of its line of Bowhead Sevens casters. The Sevens feature a unique hollow-wheel design intended to eliminate one of most common annoyances of wheelchair casters: collecting hair between the caster and fork.

The hollow caster uses a large stainless steel bearing that Bowhead says is more durable, less prone to rust and has a higher load capacity than typical wheelchair caster bearings. Christian Bagg, the wheelchair user who founded Bowhead, says the Sevens were designed for long-term use. “A big feature of the Bowhead Sevens is the modularity and the maintainability. What this means is each component is replaceable or maintainable. Some parts like the tire are consumables. We’d rather have you change just the tire than replace the whole casters,” he says.

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Bowhead Sevens start at $549 for a complete assembly or $649 for a height-adjustable version. “The adjustability is not just for accommodating different chairs, but it’s for accommodating different rear tire sizes. If you were to put a bigger tire on your chair as opposed to a smaller one, that would change the ride height of the back of your chair, which will change your caster angle. You can accommodate for this change in tire size just by lengthening or shortening the height of your caster,” says Bagg.

For ordering information, including a list of compatible wheelchairs, visit Bowhead’s website.