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3 comments
Direct your question to the experts, Continental https://www.continental-tires.com/bicycle/contact
Post back to let us know what Conti says.
GP 4000 II are larger compared to regular GP5000.
25 mm TL version is closer to 27 mm. Have them on my bike and found to be pretty comfortable.
You can see more details in review below
https://www.bicyclerollingresistance.com/road-bike-reviews/continental-g...
And comparison table
https://www.bicyclerollingresistance.com/road-bike-reviews/compare/conti...
I think they're round so you should be OK.