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Rim bed torn at spoke hole. This tear occurred after the rim wall failed while the tire was running flat. The rim is a nearly new Greenspeed Scorcher disk brake 36-hole 406 rim (manufactured by Velocity) on which a Primo Comet (54mm) had been mounted and inflated to 80 psi. The rim was built into a front wheel of a tandem and failed while being ridden. Fortunately, no one was injured.