Craig said:Ok, I have a 2001 GT Palomar mountain bike which I MUST USE!!!! My wife will not let me buy a new
bike, even if the new one will be cheaper. If
the project is too expensive, it simply will not be done.
Quoted message said:
So the goal is to put drop bars on my bike. I like the feel of them better. But of course, this is
not as easy as it sounds.
I have a Specialized Rockhopper FS comp, that someone converted to a touring bike with drop bars,
racks front and back, fenders, bar end shifters, Diacompe levers etc. It is all XT with an XTR
reverse derailleur. It is a great bike as an all arounder, I paid $500 for it, about as much as I
would ever pay for a bike and it nice, but there are some issues you need to be aware of.
1. Fit. Mountain bikes are designed to fit with flat bars. Putting drop bars on a mountain bike
that currently fits will mean that the stem needs to shortened a great deal and in fact it may
be impossible to make the bike comfortable because you will be too stretched out. Also realize
that for off roading, the forward position that a road bike requires for braking is not ideal,
especially on a steep downhill.
2. Gearing. Most MTBs come with a compact drive crank these days. For most uses these are fine but
normally a 44 is about all you will find so you if you purchase the appropriate tires, ie high
pressure 1 inch tires, your top gear will we well under 100 inches.
Quoted message said:So, to still be able to use the shocks occasionally, I was going to use a steering tube extender, a
threadless headset and hopefully use the same stem. Which brings me to...
Shocks with drop bars are a pain. When you brake you are already stretched out, the shocks accenuate
the dive. Once you do the conversion forget switching back.
Quoted message said:
2. Is it possible to use the same stem for road and mountain geometries simply by flipping it over
to give the bars some rise?
See above about fit. Also others have commented on the fact that most road bars are 26.0 while MTB
bars are 25.4. Need a different stem but stems are cheap.
Quoted message said:3. Drop bars will need new shifter and brake levers. Now, since I have really low end Shimano stuff
on the bike now (Altus), I have no issues with going higher end for the entire drivetrain.
However, I would like to buy the parts over the run of a season and continue to ride while
waiting for the next part. SO, since I have a 7 speed freewheel, will my new Ultegra shifters be
compatible until I upgrade the freewheel to a 9-speed cassette? Also, will the break levers be
compatible with my V brakes?
You can either go the travel agent route with the shifters or use separate brake levers and bar
ends. The bar ends will let you operate in the friction mode and thus use 9 speed shifters with a 7
speed cassette. To use STI shifters you would have to respace your current cassette with 9 speed
spacers, some more work.
Quoted message said:4. When it comes to getting my new drivetrain, should I go all Ultegra or should I go XT or a combo
of both? I will be doing mostly road but some hard path and single track as well.
This is about money mostly, so without knowing your situation, I would say the best crank would be a
standard 110-74 crank, this will allow you the widest range of chain ring choices, I would suggest
something like a 48-36-24. As far a rear derailleur, get MTB stuff, it will handle the big
differences in cogs better.
Quoted message said:
5. Will I have to replace my cranks and chainrings for this whole thing to work?
Probably unless you want to be stuck with a too low top gear.
Quoted message said:6. What else am I not seeing?
Quoted message said:Ok, what does everyone think?
Craig
I am guessing that you probably paid about $300 for this bike what with Altus etc. To put drop bars
on it, get the shifters working, getting the cranks, bottom bracket, it probably will cost you
probably another $300 minimum and by the time you include another cassette, freehub, tires and
stuff, you will be looking at $500.
And the problem is that in the end, you will have $800's invested in a $100 frame that probably
won't fit right anyway.
The first such conversion I did was to my Softride MTB. I had all the parts and it was just time.
One ride around the block was sufficient to convince me that this was a poor idea.
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In my experienced, based on several years of being a "junk yard" engineer and bicycle mechanic is
that it is best not to ask a bike to be more than it is.
Leave this bike as it is, if you want to go faster, put on some 1 inch 100 psi tires and go for it.
The drop bars and gears and all will add a small amount but mostly if you put those tires on it,
that will do about as much as you can
do.
Over the season, keep your eye open for a decent road bike, your size that fits and is being sold at
a bargin price. A bike that cost $1000 or $2000 10 years ago can be bought for less than the cost of
upgrading to STI shifters, sometimes much less.
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It is better in my view to start with a bike designed for the job rather than trying to make
something into something it is not. Sure in the case of my Specialized someone took the time to do
this. But this bike is not particularily fast, certainly no faster than it would be with flat bars.
It is just a very solid bike that handles loads and rough roads well, looks nice and is durable,
reliable, uses 26 inch tires and tubes which are available in out of the way places...... For this
task, a nicely made steel MTB frame with a rigid fork is a reasonable choice..
I believe that experimenting as you propose to do is a good thing, but unless one wants some real
heartburn and heart ache over money spent with a sad result, it is best to do such experiments with
as little investment as possible. In my case, I am fortunate that I have a garage full of parts,
even a couple of extra frames, lots of wheels, chain rings, cranks, derailleurs.......
Bottomline: You are asking something of your current bike that is unreasonable, I believe when you
are done, you will be disappointed in the results. You would be wiser to find a decent road bike and
start from there.
The important factors about a road bike are not the things that you can easily change, brakes,
shifters and cranks, rather it is the geometry, the tires, and the fit. The 1984 SR Maxima that
hangs in my garage is realistically every bit as fast as the more recent vintage bikes, sure it has
friction shifting and only 6 or 7 speeds, but it fits and it wants to fly.
Jon Isaacs