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go really hard to the top of the hill, you cant help but recover on the way down, the final roundabout to the turn is slow so its worth putting some extra power out there and don't be surprised about it being slow (apparently the resevoir makes the air cooler and slower?!), don't mess up the turn (worth driving round if you have time, but deffo google street view it), pray for luck at the roundabouts on the way back.
finally, enjoy the hill on the way back up, completely spent with 58/23 as your easisest gear!
Anyone got any tips and advice for riding the R25/3H course? I'm racing it on Sunday, and it'd be good to make the most of the trip down to South Wales.