Pacing? If you just go off RPE you could start at 300w and finish at 200 and still feel the same.
I go off watts. Average 285-290 for a 10, but a measly 245-250 for a 25.
You're not trying hard enough. You should be able to manage at least 265 for a 25.
@Sam started
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Pacing? If you just go off RPE you could start at 300w and finish at 200 and still feel the same.