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You can bolt an inner chainring to it from the inside with four bolts, or run it as a single ring.

You can bolt an inner chainring to it from the inside with four bolts, or run it as a single ring. The Vuma crank is available from 165mm to 180mm.

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You can bolt an inner chainring to it from the inside with four bolts, or run it as a single ring. The Vuma crank is available from 165mm to 180mm.  |  Photo: Lennard Zinn
Slideshow: Click photo to view next image
You can bolt an inner chainring to it from the inside with four bolts, or run it as a single ring.
You can bolt an inner chainring to it from the inside with four bolts, or run it as a single ring. The Vuma crank is available from 165mm to 180mm.  |  Photo: Lennard Zinn
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Slideshow: Click photo to view next image