Forum: Techniques
August 7th 08, 01:35 AM Posted to rec.bicycles.tech
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Replies: 82
Views: 2,100
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Forum: Techniques
July 25th 08, 03:34 AM Posted to rec.bicycles.tech
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Replies: 32
Views: 1,276
Le Tour: How do these guys do it?
"The hematocrit (Ht or HCT) or packed cell volume (PCV) or erythrocyte
volume fraction (EVF) is the proportion of blood volume that is
occupied by red blood cells. It is normally about 46% for...
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Forum: Techniques
July 1st 08, 01:25 AM Posted to rec.bicycles.tech
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Replies: 17
Views: 2,057
Prescription Cycling Glasses?
I have to agree with David's criticism of Bolles, though. They're nice when
they are new (I actually sprung for a third discounted pair this spring),
but they don't hold up well at all,...
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Forum: Techniques
April 11th 08, 10:58 PM Posted to rec.bicycles.tech,rec.bicycles.racing
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Replies: 133
Views: 2,494
HEART RATE
There is VERY little difference between riding slowly and riding very hard
over any specific length of road. The difference is that riding very hard
your muscles don't work quite a...
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Forum: Racing
April 11th 08, 10:58 PM Posted to rec.bicycles.tech,rec.bicycles.racing
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Replies: 104
Views: 1,350
HEART RATE
There is VERY little difference between riding slowly and riding very hard
over any specific length of road. The difference is that riding very hard
your muscles don't work quite a...
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Forum: Techniques
April 11th 08, 02:30 AM Posted to rec.bicycles.tech,rec.bicycles.racing
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Replies: 133
Views: 2,494
HEART RATE
I was always told the rule of thumb was "220 less your age" - until I
came across this formula today:
210 - (half age in years) - (0.11*(weight in kg)) + 4
That is amazingly close....
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Forum: Racing
April 11th 08, 02:30 AM Posted to rec.bicycles.tech,rec.bicycles.racing
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Replies: 104
Views: 1,350
HEART RATE
I was always told the rule of thumb was "220 less your age" - until I
came across this formula today:
210 - (half age in years) - (0.11*(weight in kg)) + 4
That is amazingly close....
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Forum: Techniques
March 16th 08, 03:52 PM Posted to rec.bicycles.tech
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Replies: 19
Views: 763
rear der adjustment
What makes the RD move?
Like anything else, the rear derailleur moves because a force acts on it. In
this case, there are two opposing forces, coming from the cable (tension) and
the spring. ...
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Forum: Techniques
March 16th 08, 01:44 PM Posted to rec.bicycles.tech
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Replies: 19
Views: 763
rear der adjustment
Which it isn't. As you say it's the cable length you're setting here and
the tension is always the same and determined by the derailleur spring.
Correct
I disagree. As the derailleur...
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Forum: Techniques
March 16th 08, 01:11 PM Posted to rec.bicycles.tech
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Replies: 19
Views: 763
rear der adjustment
tension is determined by de spring in the derailleur. You adjust the
POSITION of the upper pulley with barrel adjuster.
If the derailleur is on its lower limit screw and you turn the...
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Forum: Techniques
March 8th 08, 05:44 PM Posted to rec.bicycles.tech
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Replies: 588
Views: 10,126
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Forum: Techniques
March 7th 08, 05:58 PM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
Information on the trimming function is at:
Thanks for the link. I have the older 9-speed version (5500) but found the
proper service instruction on Shimano's website. I do trim in the middle...
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Forum: Techniques
March 7th 08, 05:46 PM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
but I am curious about the chain angles you get at the most inner and outer
rings of your rear cassette. I was always advised to avoid them to get the
most life out of your chain and...
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Forum: Techniques
March 6th 08, 05:54 PM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
should be able to manage with a 39/27, or maybe a compact crank.
I'd call that a really, really low gear. You must have some mega
hills.
Very steep (some over 10%) but short (I haven't done...
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Forum: Techniques
March 6th 08, 05:14 PM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
I have a 3x9 105 Shimano setup on one of my bikes.
I can get cleanly to:
8 sprockets from the small ring.
9 sprockets on the middle ring.
8 sprockets on the large ring,
Did this ever...
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Forum: Techniques
March 6th 08, 02:41 PM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
Do you need a triple?
I don't need a triple anymore, but this is my first bike and that's what it
came with. If/when I get a new bike, I won't get a triple. I do want a
pretty low gear, as I...
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Forum: Techniques
March 4th 08, 12:21 AM Posted to rec.bicycles.tech
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Replies: 20
Views: 1,481
Chain rub and usable gears
I have a 2005 Trek 1500 with Shimano 105 triple front derailleur and 9-speed
cassette. No matter how much I fiddle with front derailleur adjustment, I
find that chain rub limits the usable rear...
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Forum: Techniques
February 28th 08, 05:35 PM Posted to rec.bicycles.tech
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Replies: 19
Views: 1,330
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Forum: Techniques
February 8th 08, 02:24 PM Posted to rec.bicycles.tech
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Replies: 67
Views: 1,474
brain drain at rbt...
It's really unfortunate that United doesn't consider San Jose a co-terminal
to San Francisco. San Jose is almost never affected by weather, but they
won't generally let you change your return...
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Forum: Techniques
January 18th 08, 04:17 AM Posted to rec.bicycles.tech
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Replies: 11
Views: 1,680
Thule roof rack and carbon dropouts?
I no longer feel comfortable with roof racks that clamp the front forks,
period. Particularly for road bikes. I've seen too many customers mangle a
dropout as they were trying to get the bike...
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Forum: Techniques
January 17th 08, 05:31 PM Posted to rec.bicycles.tech
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Replies: 9
Views: 635
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Forum: Techniques
December 25th 07, 05:17 PM Posted to rec.bicycles.tech
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Replies: 141
Views: 4,369
Best multi tool for touring
I couldn't find a photo (mercifully defunct??) but there was a patent twenty
years ago on a wrench system with a couple dozen small pins in a socket
which would surround a bolt head (any...
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Forum: Techniques
December 24th 07, 09:21 PM Posted to rec.bicycles.tech
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Replies: 30
Views: 6,592
Thorn catchers in the TDF
Clarification: 8.25 is the sigma for the difference in the number of flats
between two different years. Sigma for the number of flats in an individual
year would be this divided by square root of...
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Forum: Techniques
December 24th 07, 09:06 PM Posted to rec.bicycles.tech
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Replies: 30
Views: 6,592
Thorn catchers in the TDF
To illustrate luck and random variation, I've had 54 flats so far in
2007 in 313 15-mile rides.
In 2005, I had only 14 flats on the same route, a 75% reduction.
My comparatively flat-free...
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Forum: Techniques
November 22nd 07, 05:04 PM Posted to rec.bicycles.tech
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Replies: 236
Views: 3,971
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