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I'd go with mechanical: https://www.canyon.com/en-gb/bikes/bike-detail.html?b=3746
And get U-shaped chinese wheels like these: http://www.wheelsfar.com/road-wheels/clincher-tubeless-compatible-wheels/38c/38mm-x-25mm-dt-350-clincher-tubeless-wheelset.html
Spend rest money on aero suit and aero helmet.If you like Roadlite you will love ultimate
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Endurace carbon Di2 is cheaper than that oddly enough.
Hmmm - this one? https://www.canyon.com/en-gb/bikes/bike-detail.html?b=3748
Ticks the boxes for group, wheels and paint job. Was kinda set on crabons, but having been thoroughly pleased with the performance of my Roadlite, I'm open to staying with Alu, especially at that kit level and price. Decisions, decisions.