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10:43AM Tue, 24th July 2012
The seat tube design that Trek calls a Roll-wrap seat tube. The seat tube is an independent member that pierces that top tube and seatstays. The idea is to give a really compliant ride so that the rider can keep the power down while seated, according to Trek. The design is claimed to be twice as compliant as the previous Superfly frame.

The seat tube design that Trek calls a Roll-wrap seat tube. The seat tube is an independent member that pierces that top tube and seatstays. The idea is to give a really compliant ride so that the rider can keep the power down while seated, according to Trek. The design is claimed to be twice as compliant as the previous Superfly frame.