• 1-2km/h average speed difference is far too small to make a conclusion from, especially when it's usually depend whether you're on form or not.

  • I ride with my housemate quite a lot. He used to exclusively ride his Dawes Galaxy with 32c Marathon Plus tyres. I'd basically be on the front the whole ride. Then he went out and got a carbon fancy and fuck me, I could hardly keep up. Massive difference in top speed and acceleration.

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