Auf http://www.bikeradar.com/fitness/article/how-aero-is-aero-19273
gibt es einen recht guten Artikel über "How aero is aero?" (in englisch). Getestet wurde ein normales RR, mit Aufleger, mit TT Rad, Aufleger, Aerolaufrädern, SRM etc; mit Fotos (u.a. Windtunnel, Lowe's Speedway ) und Videos.
Key points
* Position: Going from drops to aerobars will save you ~30 watts at 40km/h
* Bike: A time trial frame will save you ~20 watts over a road frame at 40km/h
* Helmet: A time trial helmet will save you ~10 watts over a road helmet at 40km/h
You want to get faster against the clock. You want to know if you spend X you will get Y time savings in return. Problem is, you're bamboozled by a plethora of marketing hype and scientific data put out by companies who want you to buy their stuff, whether it be snazzy equipment or even time in a wind tunnel. Where do you start?
Conclusio:
Finally, to put it in perspective, we can list the wattage savings per unit cost.
Cost $/watts saved at 40km/h
Clip-on bars $100-1200 $3.30-$40
Aero helmet $75-230 $8.30-25.50
Time trial frame $1000-10,000+ $50-500
Aero wheels $600-$8000 $60-800
How much is it worth? That's for you to decide.
mfg wo-ufp1