Super-holy Rolling Darryls

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How to make a nice pair of 82mm wide fatbike rims even better?  Drill a lot of holes.

Thirty holes per rim, not on the welded seam and not on the valve hole.  Except, that one rim in which Lael accidentally drilled the valve hole and I drilled a new valve hole at the seam, opposite the old valve hole.  Holes are 1 1/2″ in diameter.  Smaller holes are common, while bigger holes might compromise the structure of the rim– 1 1/4″ to 1 1/2″ holes are recommended.  Tools include a spring-loaded punch and template, a drill bit for a preliminary series of pilot holes, and a 1 1/2″ hole saw for the final cutout, drilled by hand with a battery and/or a cord powered drill.  Finish with a deburring tool and a touch of sandpaper.  The final pile of aluminum discs weigh 186 grams, which does not include the handful of aluminum shavings on the floor.  This is more than the claimed weight difference between the un-holy (solid) and the factory-supplied holy Rolling Darryls

Above, Lael’s subtle black, red and white theme continues with a new pair of Revelate Williwaw pogies.

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Thanks to Eric Carpenter for the tools, the expertise, and the rustic lodge-style workspace, right in the middle of downtown Anchorage.

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7 thoughts on “Super-holy Rolling Darryls

    • Drilling the rim and installing a lighter tube (or a tubeless set-up), may bring each wheel down almost a full pound in weight, which I think is substantial and noticeable while riding. There are other places to cut weight off the bike– an ultralight bike of any kind is an ensemble of carefully chosen parts– but this is the cheapest way to reduce the overall weight of the bike. The procedure scores well on the dollars to grams scale, especially vs. some modern component upgrades, including $500 cranks and $2000 rims.

    • Zach, Yes, it was a crude template. I pressed a piece of coruplast onto two adjacent nipples and drilled holes accordingly. Then, I found the midpoint of those two holes and drilled a smaller hole as a guide for the punch.

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