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@J0nathan
On the tyre debate, swapped out 25mm GP4Ks for 23mm Four Seasons which I keep for Sportives (when it always rains) as I also have clearance on my Canyon for crudcatchers with 23mms. The last action they saw was at the Tour of Pembrokeshire in April which wasn't as wet but was extremely windy. They behaved brilliantly on both rides.