OK, I have never ridden a Marathon tire on a brevet. But I used a pair for commuting, and I know I am at least 1 mile per hour slower on the flats compared to a tire like Conti GP4000S. For me a typical 600K could mean about 26 hours of riding time. If I take out 6 hours where tire resistance is not a big factor (significant climbs and descents), I would lose 1 mph over 20 hours, or I would be behind by 20 miles. This is a very rough estimate - I may actually hang in a paceline and keep the same speed some of the time, but I would be expending more energy which means I would be paying for it later.
Paradoxically, tire resistance makes a bigger difference for slower riders. If you ride faster, work against air resistance becomes a larger percentage of your total power expenditure, so you gain less by using faster tires. On Sunday, November 22, 2015 at 10:15:04 AM UTC-8, ted wrote: > > Metin, > > I don't mean to be argumentative, just curious. Could you explain how you > know that using Marathons would cost you at least an hour in a 600K ride? > > regards > Ted > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
