| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1940.1 | spoked wheels with covers are lighter than disk wheels | OXNARD::KLEE | Ken Lee | Wed May 08 1991 21:31 | 7 |
| I would think that wheel covers would always give you better
performance since they give the same aerodynamic advantages,
but are considerably lighter. Note, however, that wheel covers
are barred from many races.
Ken
|
| 1940.2 | The jury's still out... | NOVA::FISHER | It's Spring | Thu May 09 1991 10:08 | 5 |
| I have seen reports that wheel covers do not provide a benefit because
they do not provide a smooth surface, because they are stretched over
the spokes.
ed
|
| 1940.3 | DESIGNER DISKS... | WMOIS::C_GIROUARD | | Thu May 09 1991 10:33 | 11 |
| HED has done extensive wind tunnel testing (and I'll leave the
bias argument for the audience). They show minimal if any ad-
vantage above a spoked wheel. There are results of these tests
in a few issues of Bicycling magazine. If I get a minute or
two I'll try and find them and publish.
Chip
P.S. You're disks/tri-spokes are veeeerrrry pricey.
|
| 1940.4 | Others? | TPWEST::SHROYER | | Thu May 09 1991 14:38 | 24 |
| > <<< Note 1940.3 by WMOIS::C_GIROUARD >>>
> -< DESIGNER DISKS... >-
>
> HED has done extensive wind tunnel testing (and I'll leave the
> bias argument for the audience). They show minimal if any ad-
> vantage above a spoked wheel. There are results of these tests
> in a few issues of Bicycling magazine. If I get a minute or
> two I'll try and find them and publish.
>
> Chip
Thanks, I'd really appreciate the info. The only article I saw in Bicycling
did not test rear wheels. The marketing hype from Unipro claims high
efficiency.
By the way, these would be for TTs only. USCF districts and nationals;
both relatively flat and smooth courses.
>
> P.S. You're disks/tri-spokes are veeeerrrry pricey.
Hmmmmmm.....this comment coming from a Merlin/C-record person?!
|
| 1940.5 | WILL TRY... | WMOIS::C_GIROUARD | | Thu May 09 1991 15:45 | 4 |
| Wellllllllll.... there more than the average bear, I mean
spoked set up regardless of hub... I'll get at it...
Chip (I run ZIPP...)
|
| 1940.6 | impressions? | SHALOT::ELLIS | John Lee Ellis - assembly required | Thu May 09 1991 16:08 | 6 |
|
RE: "I run ZIPP" - can you speak from your own experience?
Worthwhile performance gains? How critical is the wind
direction?
-john
|
| 1940.7 | GOOD QUESTION... | WMOIS::C_GIROUARD | | Thu May 09 1991 17:10 | 9 |
| Crosswinds don't seem to be a problem. I run a 28 spoke radial
laced...
It does seem to be slippery but I couldn't quantify it... It does
feel faster.... I like the ZIPP, but I do't have anything to compare
it to either except spokes...
Chip
|
| 1940.8 | Triathletes know Disks | NEMAIL::DELORIEA | I've got better things to do. | Fri May 10 1991 12:47 | 7 |
| >> I'm interested in the performance characteristics of wheel covers (such
>>as the Unidisk) vs. a solid disk/J-disk. Has anyone seen test data on their
>>relative performance?
See notes 438, 507 in the Tri notes conference.
T
|
| 1940.9 | | BUSY::SLABOUNTY | Holy rusted metal, Batman! | Tue Aug 15 1995 14:03 | 7 |
|
Any new info on wheel covers? Nashbar appears to have them for
$50 each [ouch, but better than $200-$300 for disc wheels].
I read recently that they're supposed to be very helpful in red-
ucing drag [up to 25%?] and increasing downhill speed [5MPH].
|
| 1940.10 | | WMOIS::GIROUARD_C | | Tue Aug 15 1995 16:02 | 11 |
| -1 the only thing better is they are much cheaper than the real
thing given they perform better than a spoked wheel (but not
a whole lot).
it really gets down to what you will be doing, e.g. serious TT'g,
centuries, cruising, etc...
i know people who use them. they can be a pain if you're going to
removing them regularly.
Chip
|
| 1940.11 | off road applications? | PAR3::GLYNN | John | Tue Aug 22 1995 20:45 | 12 |
| I've been toying with the idea of putting a wheel cover over
the rear wheel of my mt bike. I broke a rear deraileur last
year when I picked up a stick (well, ok, more like a branch)
in my rear spokes.
How sturdy are these covers?
Do they stand up to the beating of single track?
How accessable is the stem? I change my tire pressure quite
often.
Thanks,
/John
|