Tuesday, December 4, 2012

Easy Instant Cheapest Most Sensible Effective Proven Aero / Aerodynamic / Performance Part Product Accessory

....a WATERBOTTLE ON THE DOWNTUBE. 7.5 seconds faster in 10km. 30 seconds faster in 40km or approx. 75g less drag thanks to simply putting a standard waterbottle in its usual place onthe downtube bottle cage.

*On the average bike trip that most of us daily cyclists do (2-5km) to go to n from work...that 3 seconds faster on every trip! That can be the difference between catching the bus/subway and missing it. And yes, I am living proof of that.*

So, GET yer DOWNtube bottle on folks! It'll make you faster!
Unless you have a wicked new CYCPRO or equivalent Softride, Zipp or Lotus bike in which case you'd have the fastest bike on the market regardless ofthe downtube bottle.

My source: John Cobb and his test results from the Texas A&M wind tunnel:

The quick numbers results:


Ave. Drag
40 km
112 mi
base bike, no bottles
7.537
1:07:26
5:56:48
down tube bottle only
7.370
1:06:58
5:54:29
seat tube bottle only
7.433
1:07:09
5:55:22
bottles on both tubes
7.598
1:07:36
5:57:38
Profile bottle only
7.337
1:06:53
5:54:01
Hydropac w/40oz. only
7.556
1:07:29
5:57:01
Never Reach only
7.561
1:07:30
5:57:07
behind-seat low bottles
7.658
1:07:45
5:58:27
behind-seat high bottles
7.578
1:07:32
5:57:27



Whole article:
http://www.slowtwitch.com/mainheadings/techctr/waterbottles.html

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