I think the +s are more sensitive to running 'under pressure' than the normal marathons. The original front wheel for my SMGTe has a Marathon racer, whilst the replacement (SON hubbed) now has a Marathon+. Before the SON'd racer gave up, I couldn't really detect any difference in the speed (and believe me, I was looking). With the plus, its like riding through sludge at times.Auntie Helen said:Well I don't agree with them, having had Marathons on the front, then M+, then back to Marathons. There is a significant difference in rolling resistance and I am unlikely to go back to M+ on the front although it's still a consideration on the rear.
I'd agree with that, plus you are lugging an extra couple of kilograms around, which shows up hill. I find I'm faster into the wind with the Streamer, in fact the speed loss into even a full gale is pretty small compared to riding without the fairing. Down some of out local hills the faster I am without the fairing the greater the gain with it. So a hill I descend at 40-42 mph unfaired sees 44-48 mph faired. While another that sees me consistently hit 32mph unfaired gets 34-35 mph faired.Ben Lovejoy said:The fairing, incidentally, makes naff-all difference to streamlining until you get to pretty high downhill speeds - I did a roll-down test with & without it on a hill where I reach just over 20mph from a standing start, and the difference was from memory about 0.1mph.