I never ride with a computer or even speedometer. I let the lycra-clad crowd pass, and try to stay ahead of the grannies.

However, the latter is becoming more difficult these days. Only last weekend, as I was riding (vintage steel shod with 20mm tires at 120 pounds) through a town riddled with cobblestones and hazardous junctions I had a couple of OAP's on their e-bikes on my rear wheel for at least three miles. While I was doing my best trying to stay upright and not get hit by a car, I kept hearing them babbling behind me. Not an uplifting experience.