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Home > Forum > Triathlon Forum > Renn IM bike split improvement?

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Renn IM bike split improvement?
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VegasTrilete
Nov 14, 04 7:54
Post #1 of 6 (1281 views)
Ride a 1999 QR Kilo (round tubes), carbonaero fork and H3s.

As a general rule, how much time would I shave off by having a Renn disc in the back and H3 up front for an IM? And for an Oly?

Of course plan on improving my training by being smarter. And am also going to get my weight down. The past 5 years have weighed around 183 during race season. Am going to get down to 173-175 (about were I was at age 25, 20 years ago).

thanks

PS. OLN is showing IM Wisconsin and an ITU race today on TV.
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Re: Renn IM bike split improvement? [VegasTrilete] [ In reply to ]
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cerveloguy
Nov 14, 04 8:46
Post #2 of 6 (1228 views)
The difference between a disc/trispoke combo over regular 32 spoke wheels is on this site.

http://home.hia.no/~stephens/aero.htm

I can't remember the source, but it seems to me that the advantage of a disc over trispoke or deep dish rear was round 8-12 seconds over 40 kms. The disc is fastest but as the deep dish or tri spoke rear are also quite fast wheels, the advantage isn't near as much as against regular 32 spoke wheels.
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Re: Renn IM bike split improvement? [VegasTrilete] [ In reply to ]
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cerveloguy
Nov 14, 04 8:50
Post #3 of 6 (1224 views)
Hed also publishes their aero data so you can see the drag differences between a disc and tri spoke. Unfortunately I don't know how to translate into actual speed.

http://www.hedcycling.com/wheels/hed3.htm
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Re: Renn IM bike split improvement? [VegasTrilete] [ In reply to ]
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sergio
Nov 14, 04 8:52
Post #4 of 6 (1221 views)
It is proven that a disc is always faster in 95% of the courses. How much? there are too many guesses and too many different numbers
=====================================
S�rgio Marques
When it hurts is when it feels good ;-)
Sergio-Marques.com
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Re: Renn IM bike split improvement? [sergio] [ In reply to ]
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freestyle
Nov 14, 04 8:57
Post #5 of 6 (1211 views)
sergio check your pm
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Re: Renn IM bike split improvement? [VegasTrilete] [ In reply to ]
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TriDave79
Nov 14, 04 9:11
Post #6 of 6 (1185 views)
If everybody here on slowtwitch was as concerned about how to improve time by buying stuff, than actually improve their training I think several ppl on this board, including myself, would be a lot faster :) I mean I like buying stuff, especially wheels, but when It comes down to it the, biggest timeshaver will always be how fit you are on raceday...

Dave
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http://www.nasvik.se
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