Climbing with kilos

A place for those keen on vintage and retro bikes - steel is real.
User avatar
marc2131
Posts: 1107
Joined: 03 Jul 2011, 13:14
Location: Ashbury

Postby marc2131 » 15 Jul 2014, 19:41

Spotted this GCN video on Youtube a while back. However thought it is appropriate seeing that many of us will be racing in the CNSW Club Team time trial at Nowra this weekend. Not forgetting its rather tiring 18km hill climb, I thought this video would give a bit of insight how a little extra weight on the bike or rider can impact on ones power expenditure.

http://m.youtube.com/watch?v=5DRQwKREgvI

Apparently climbing at approx 20kmph on an 8 kg bike compared to a 12 kg bike, a rider needs to expend 22 per cent more power if riding the 12 kg bike.
Guess it is stating the bloody obvious.

User avatar
jonboy
Posts: 353
Joined: 01 Sep 2011, 20:26
Location: Marrickville

Postby jonboy » 15 Jul 2014, 19:57

Yes, but what is the effect of a heavier bike in the downhill half of the time trial?
Assist /not assist / no effect? Discuss...

User avatar
marc2131
Posts: 1107
Joined: 03 Jul 2011, 13:14
Location: Ashbury

Postby marc2131 » 15 Jul 2014, 20:14

Oh, we have already did the lab testing during the 2013 TTT, and know the answer.
JohnJ is deadly on the downhill sections.

User avatar
mikesbytes
Posts: 6988
Joined: 13 Nov 2006, 13:48
Location: Tempe
Contact:

Postby mikesbytes » 16 Jul 2014, 09:27

My TT bike is about 3kg heavier than my road bike. My body weight + TT bike weight total is about 10kg heavier than the heavy guy in that video.

So marc I expect to see you doing a faster time than me on the outward leg on Sunday :)


Return to “Vintage Bicycles”

Who is online

Users browsing this forum: No registered users and 1 guest