Tube 700x20/25 27x1 to 1-1/8
Inner Tube, 622-630 mm x 20 mm thru 25 mm width.
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I kept the tires inflated a 100 lbs. After two months both tubes developed a separation at the seem where the presta valve is attached and in the same week. I checked the rim tape. Next time I'll deflate the tubes every day and see if they last longer.