Heras’s climbing bike. Note the oversized 1-3/8′ lower headset bearing, with the 1-1/8′ upper head cup. The u …
Heras's climbing bike. Note the oversized 1-3/8' lower headset bearing, with the 1-1/8' upper head cup. The upper cup has wrench flats (Shimano doesn't make threadless headsets), but the threads have been bored out for the threadless steering tube.
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Heras’s climbing bike. Note the oversized 1-3/8′ lower headset bearing, with the 1-1/8′ upper head cup. The upper cup has wrench flats (Shimano doesn’t make threadless headsets), but the threads have been bored out for the threadless steering tube. | Photo: L. Zinn
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Heras’s climbing bike. Note the oversized 1-3/8′ lower headset bearing, with the 1-1/8′ upper head cup. The upper cup has wrench flats (Shimano doesn’t make threadless headsets), but the threads have been bored out for the threadless steering tube. | Photo: L. Zinn