Trek Supercaliber frame upends XC suspension with IsoStrut

trek supercalibre 9.7

Eventually the suspension Jolanda Neff has been winning world cups on has been unveiled, the Trek’s new Supercaliber cross-country race bike. The IsoStrut, 60mm travel and sub-2kg weight, fewer pivots and linkages make for more simplified and efficient suspension.

Supercaliber’s IsoStrut suspension
Trek teamed up with Fox to design the suspension unit specifically for this Supercaliber.

The IsoStrut itself is fixed in place at both ends, and the frame becomes part of the suspension, with the fixed tube (or ‘carriage’) at the top seat stay junction sliding over a stanchion housing the internal workings of the suspension.

No pivot in the seat stays
Feather-light at a claimed 1,950g including the shock . Trek Supercaliber 9.7

With no pivot in the seat stays, the design relies somewhat on frame flex in order to work. Key for marathon racers is that the frame design leaves room for two water bottles.


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