This all depends on how aerobically fit you are, but my first aim would be (upper) Z2 on the flats and sweetspot on the climbs. Zone 5 on 4k of climbing would make no sense imo.
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This all depends on how aerobically fit you are, but my first aim would be (upper) Z2 on the flats and sweetspot on the climbs. Zone 5 on 4k of climbing would make no sense imo.