Wheel testing - Neaves Road

The last three TT's have been very slow. Even though I have been producing good power numbers, the times have been poor. Barely better (if) than last year. And people I should be matching have been getting times minutes(!) better.

For example at Aldergrove Bill Riley was 23:04 and Gerry van Ganz was 23:10. With me back at 24:21.

So I decided to look at the bike and see if there where any potential problems. And decided it could be the Zipp 404's with Tufo S33 tubulars.

To test I went out to Neaves road and did two tests each to compare the Zipps against my tried and true (and cheap) Bontrager Lite Aero (aluminum) wheels. Each test was 2.5 k out and back (5k total). Tests at 36kph and 42kph.

The results seem to be unequivocal, every Zipp test had higher average power for lower average speed.

Possibly by as much as 20 - 30 watts.