Did it this year (together with the rest of the Ronde Van Vlanderen hills) when dry. When dry you can stand on the pedals and just power your way up. Cobblestones make every hill much harder as the friction reduces your speed. As you can see from the pictures, there is a gutter on the side which makes the climb a bit easier as it''s smoother. In the Tour of Flanders, cyclists try to use the side when possible as well. As with most Ronde climbs, there is a turn before the hill starts which means that you have to reduce your speed before the start. However, here you have about 200 m before the hill really kicks up.