T.R | Title | User | Personal Name | Date | Lines |
---|
1719.1 | Ask your local expert for help | CIMNET::MJOHNSON | Matt Johnson, DTN 291-7856 | Tue Aug 28 1990 15:25 | 12 |
| The best way to solve problems like this is to head out with
an experienced rider one evening for a short spin. He or she
should be able to figure out things like:
o Whether your derailleur can handle a wider-ratio freewheel.
o Whether your handlebars are too low, or your frame is too small.
o Whether you need help on climbing technique.
Without seeing things firsthand, it's hard to judge. Fortunately,
DEC is crawling with great cyclists!
MATT
|
1719.2 | teeth, math, etc. | KOOZEE::PAULHUS | Chris @ MLO6B-2/T13 dtn 223-6871 | Tue Aug 28 1990 15:39 | 24 |
| There's quite a few notes here talking about this kind of upgrade, but,
since I've upgraged my Lotus Eclair 12 speed, perhaps I can summarize.
The following parts were needed:
1. Bottom bracket suitable for triple crank
2. Triple crank
3. Extended range front deraillure
4. Extended range rear deraillure
The triple crank is the main thing you want, but you need the wider
bottom bracket to put it on. Then, the standard range deraillures will
probably not work - the front will not have enough height difference
between the large and small chainwheels to prevent the chain from
dragging, and the rear will not be long enough to take up the larger
difference in number of teeth on the triple.
If you buy the parts at a shop, know what your freewheel teeth
counts are, especially the difference between the large and small cogs,
and the size of the large cog. (ie. 32 - 13 = 19, 32 = largest). Those
numbers and the count on the triple should allow them to chose the rear
and front deraillures.
If you are ordering mail order, you need to become familiar with
the capabilities of deraillures re. the above and make the numbers:
a) difference between chainrings - to size front der.
b) difference between cogs + difference between chainrings, and size
of largest cog - to size rear der.
Have fun! - Chris
|
1719.3 | | EDIT::CRITZ | LeMond Wins '86,'89,'90 TdF | Tue Aug 28 1990 15:52 | 11 |
| Frank,
Where are you located?
I agree with both .1 and .2. It would help to have an experienced
rider ride with you and see what adjustments can be made.
As John Ellis told me once (or implied, I don't remember), it
doesn't hurt to get the body in better shape, either.
Scott
|
1719.4 | adding a granny gear | RUSTIE::NALE | | Tue Aug 28 1990 16:32 | 11 |
|
I had a granny gear (don't know the technical term) added to my
Fuji. Turned my 12-speed into an 18-speed. I didn't need a new
deraillure, as the old one was able to handle the new gear.
I agree that maybe the body could have been in better shape, but
I was going to be lugging 60 lbs of stuff around Germany for 5
weeks and definitely NEEDED this gear! It's saved my butt
(literally) a number of times since!
Sue
|
1719.5 | Granny gear sounds good... | HKFINN::F_JOHNSON | | Wed Sep 05 1990 11:31 | 14 |
| I rode about 20 miles one Saturday with one of my friends who
had the granny gear installed before the bike was delivered new.
It was unbelievably easier for him to climb hills than for me.
I'm sure that his technique in down shifting and upshifting was
lots better than mine, because he has been riding a long time.
Is adding the granny gear a difficult or complex task? Do you
think that a good bike shop could install one for me?
I thought the reply that suggested I ride with a more experienced
rider, to get a better viewpoint on what I really need, was a good
suggestion. Thanks all, for your replies. I'd like to get the bike
refitted soon, so that I can take advantage of the good riding days
of the season.
/fj
|
1719.6 | | SANDS::CRITZ | LeMond Wins '86,'89,'90 TdF | Wed Sep 05 1990 13:16 | 6 |
| Frank,
Could you tell us where you live? Maybe one of us can
then decide if we're close enough to ride with you.
Scott
|
1719.7 | My peddle paths... | HKFINN::F_JOHNSON | | Wed Sep 05 1990 13:31 | 9 |
| Sure, I live in Windham, NH, just beyond Canobie Lake. My riding from
there is east, toward Kingston, where there are some good, protected
off-highway routes; west, toward Nashua and southwesterly, through
Pelham and Salem. Unfortunately, most of these rides inevitably include
a traveled highway, in trying to make up a looping route out and back.
What makes it possible is to go early enough in the morning, out there
with the jogging folks, and when it is much less a threat to be
peddling on the side of a busy thoroughfare.
/fj
|
1719.8 | What do you have? | TALLIS::JBELL | Zeno was almost here | Thu Sep 06 1990 10:50 | 11 |
| > Can anyone advise the practicality of 1) adding another chainwheel
> to get more help on the low end or 2) replacing the lower gears
> with a ratio that is more suitable for the [long!], steep grades?
Could you tell us what kind of set up you have now? Count the number
of teeth on each cog and on each chainwheel.
Adding chainwheels is kind of expensive. It might just be a matter
of changing freewheels.
-Jeff
|
1719.9 | ...and chainwheel, too | SHALOT::ELLIS | John Lee Ellis - assembly required | Thu Sep 06 1990 11:14 | 11 |
|
Yes, I echo -.1! I myself use a 42/52 in the front, and only
have to replace knees every season or so. (I do it when repacking
the bottom bracket - similar tools required.)
Seriously, check that freewheel, and if you are really going over
the gargantuan hills, try a 39-tooth chainwheel (39/52). A 39x28
combo will work on most road bikes, and should get you up pretty
steep walls, if you are in reasonable shape.
-john
|
1719.10 | wall gears... | KOOZEE::PAULHUS | Chris @ MLO6B-2/T13 dtn 223-6871 | Thu Sep 06 1990 12:29 | 5 |
| re. last and 39X28 combo for steep walls...
And then there are those of us with weak knees and little strength
who use ridiculous things like a 24X32 for steeper grades...
- Chris (who could get away with a 26X28 on a regular bike)
|
1719.11 | Thanks a lot! | HKFINN::F_JOHNSON | | Mon Sep 10 1990 17:03 | 4 |
| Thanks, everyone, for really helpful ideas. And thanks, too, for
those who have offered to ride with me this fall. I appreciate your
answers and your experience.
/fj
|