Author Topic: Road Bike versus Mountain Bikes  (Read 405 times)

Offline eskimo2

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Road Bike versus Mountain Bikes
« on: July 18, 2007, 06:43:53 PM »
When I was a kid I started off with a Schwinn Scrambler.  Later I inherited my big brother’s 10 speed and road it to and from school daily.  I would take that thing off road just about anywhere; my ride home incorporated getting three feet of air at 35 mph.  After I ruined that thing (bent the frame, forks, pedals, etc.) I bought another Schwinn 10 speed.  I didn’t ride it that much, especially after I got a car.  When I was in college the mountain bike craze took off.  Alaska is a great place for mountain biking and I wanted one.  I was frugal though and bought nearly everything used.  After not being able to find a used one for quite awhile I finally broke down and bought a new one.  I paid more for it than I’d paid for any car.  It was a great bike and even had a front shock back when most mountain bikes still had solid front forks.  I road it everywhere and had a blast with it.  When I moved to Hawaii, I brought it with me.  Most of Hawaii was paved so I replaced the knobbys with a solid center dual purpose road tire.  That sped the bike up tremendously and I rode it more than ever.  The next move was to Colorado where I had plenty of places to put the original knobby tires and front shock to good use.  

Now I live in Ohio and I’m feeling and looking old(er) but still try to stay in shape.  This summer I’ve been biking regularly for at least and hour each ride.  I can get a good workout on my old mountain bike, but I kind of want to go faster.  Of course most of my ride is paved so I’ve got the street tires back on.  Most of the time I’m in the top gear and quite often wish I had higher gears.  (I’ve always though this bike was geared too low since anything steep enough to require the lowest gears ends up with the tire spinning on any surface except pavement.)  I also wonder about the efficiency of my tires and riding position.  A road bike handlebar drop position looks a lot more aerodynamic.  I’m sure much of my energy is spent just dragging air around.  Then there’s the tires; I’m about 10% faster at 80 PSI than I am at 40 PSI.  I wonder how much faster slicks would be?  But, what would be the point without higher gearing.  I have another issue: I’ve got arthritis in my hands and some serious tendon issues.  Alternate hand positions would be nice.  Those triathlon-bull-horn-forearm-pad-handlebar extender things also look interesting.  I’d like to have the option of putting weight on my forearms for awhile.

I‘ve been looking at road bikes on ebay and at a local shop.  Bottom of the barrel is $700… dang, and I’m poor.  Where the heck are the cheaper used bikes?  (Besides the old steel frame shifter POS)  

Do I really want a road bike?  I don’t know because I haven’t ridden one in 20 years and that was a POS Schwinn.  My daily ride takes me on subdivision streets, highway, paved bike trails, city streets and even a bit of sidewalk, loose gravel, dirt and grass.  The loose gravel stretch is on a fast downhill/steep uphill – maybe will be repaired section of the bike trail.  It’s a bit tough to control on a mountain bike, I think I’d be taking a big risk flying across it on a road bike.  I also find myself often passing pedestrians and other bikers on the grass to the side of the pavement.  I don’t know how much control I’d have on a road bike?  Then again I could always slow down for that stuff.

So, my questions are mostly for those of you who know both road and mountain bikes:
How much faster is a road bike over a mountain bike (with street tires)?  
How much harder are they to control in less than ideal surfaces?
Is there anything decent out there in the $300-$500 range (new or used)?  
Where would you shop?
Would you even recommend a used bike for a road newbie?
Would I be better off just finding a higher/faster set of gears and tires for my old Giant mountain bike?

Offline Maverick

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Road Bike versus Mountain Bikes
« Reply #1 on: July 18, 2007, 07:05:44 PM »
Before you drop serious money on a new bike why don't yo try modifying the one you have to take care of your main complaint, speed. Try installing a higher speed set of sprockets on it first. If it gets you the speed you want and is still comfortable to ride you'll be money ahead.  I found that the racer style of being bent over parallel to the ground is uncomfortable so I liked the mountain bike position better. If your primary interest is fitness, speed is secondary and you'll get a workout over smaller distances with the mountain bike.
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Offline Hornet33

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Road Bike versus Mountain Bikes
« Reply #2 on: July 18, 2007, 07:10:46 PM »
If the bike you have is still in good condition but you just want to go faster look into getting some new gears instead of a new bike. Replace your front high gear sprocket with a larger one, and possibly purchase a new rear rim with a different freewheel sprocket set that is geared more for speed instead of tourqe. With 2 rear wheels you would have the versatility of being able to road ride at greater speed and with a simple wheel change be back out in the mud. A new wheel would be allot cheaper than a whole new bike.

When I raced BMX way back when I had 2 rear wheels for my bike. One with a 16 tooth sprocket and the other with a 14 tooth sprocket. I also had 40, 42, 44, 46 tooth front sprockets I could switch out depending on the type of track I was racing on. Medium sized flat tracks with big jumps I would normally run a 44/16 gear. Short tracks I would run a 42/16 unless it had allot of sand on the track then I'd run a 40/16. Long fast tracks I'd gear up to 46/14 and go like a bat out of hell. My freestyle bike was set up with a 38/18 gear for low speed tourqe.

Just some thoughts on how to save some money but get the performance your looking for. Any decent bike shop should be able to hook you up with what you need and most shops will have used wheels so you might be able to get a real good deal.
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Offline eskimo2

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« Reply #3 on: July 18, 2007, 08:38:19 PM »
Thanks guys.  The bike is a 15 year old Giant.  Do they still make parts for it?  I looked on Ebay but really didn’t understand everything/much of what I was reading.  The biggest gear in the front has 46 teeth.  The teeth are all different lengths and are pretty gnarly; I guess I’ve been a bit hard on it.  Colorado was pretty rocky.  Anyway, it says:
Shimano SGX – Dual SIS Composite (it’s actually a bit hard to read from wear.)
It has 5 allens that attach it to the crank (Shimano Defore LX)

The smallest gear on the rear cassette has 13 teeth.  I see on ebay they have cassettes that have 11 teeth on the smallest gear; replacing that would make it 18% faster for the same pedaling cadence, right?

Or, if I replace the biggest front gear with a 52 toother I could get 13% more speed for the same pedaling cadence, right?

Replace them both and I’m a third faster (at best, where I need it)…  

I like it…
If they still make the parts…

Offline Roscoroo

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Road Bike versus Mountain Bikes
« Reply #4 on: July 18, 2007, 09:40:42 PM »
I'm using a older specialized 21 speed, moly frame, w/  26in cruiser tires for the rainy hops to work .

For long sunny day cruises I have a '04 Novara corsa,all aluminum frame, 700cm wheels, 24 speed with oil forks ,and dampening seat post .

The corsa is faster and more comfortable , but as with all bikes with shocks it absorbs part of the energy you put into it .  
for run-out i like the 700cm w/ slicker tires ,48/11 top gear ratio though alot I just wish it was in  my other bike's frameset .

But I like my comfort these days over going full slipstreamlined setup . but then i dont ride 20 miles a day anymore, i avg 3-5 miles daily w/ a 20 mile weekend run.

I suggest you go down to you local bike shop (Not wally world ) and take some out on a test ride .  I recommend the 700cm wheelset over the 26in .
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Offline lasersailor184

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« Reply #5 on: July 18, 2007, 09:44:51 PM »
Or possibly look into used bikes.
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Road Bike versus Mountain Bikes
« Reply #6 on: July 19, 2007, 04:48:32 AM »
Oh, so you want to go fast on your bicycle you say...  http://www.youtube.com/watch?v=5V2FgwN_re4

Offline Gunthr

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Road Bike versus Mountain Bikes
« Reply #7 on: July 19, 2007, 05:42:43 AM »
eskimo, it depends entirely on where you ride.   i ride on pavement, often in that flat-tire zone on edge of the road, often switching back and forth to sidewalk, and over curbs.  i use the special heavy gauge spokes, thorn proof tubes with slime.  i can fix a flat in 10 minutes or less - i get them fairly regular.  i also use  German made stainless chains with a quick link so i can easily take the chain off for thorough cleaning.  usually a 14 mile ride 5 times a week.  

for me, efficiency is not so much of a concern because i ride for the excercise and only compete against myself.  and i don't want to pay more than 400 for a bike.

so i basically stick with 5 or 7 speed cruisers.  i have a modified Calois and a Boss Cruiser.
 
so my bikes are more in the sturdy clunker catagory, while the road bikes that pass me all the time are like sports cars.   i don't care for mountain bikes for my purposes.

i don't know very much about the road bikes - but i bet there are some good used buys out there from people who get into it and back out again.   thats how i buy my scuba gear and saltwater aquarium stuff  ;)
« Last Edit: July 19, 2007, 05:45:28 AM by Gunthr »
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Offline bj229r

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Road Bike versus Mountain Bikes
« Reply #8 on: July 19, 2007, 07:15:24 AM »
Heh, brings back my childhood in the late 60's/early 70's--we all had 'English racers'-- skinny 27" tires, and ALL we did was ride through woods, streams, up/down mountains (no girly/panzy bicycle helmets for US!:aok ) Wore out lotsa brake shoes/tires, bent lotsa rims...remember dragging/carrying my bike with my pretzel-shaped front wheel home some 10 miles once:lol  (Didn't EVERybody have concussions when they were kids?)
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Offline Hornet33

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« Reply #9 on: July 19, 2007, 11:03:36 AM »
Quote
Originally posted by bj229r
(Didn't EVERybody have concussions when they were kids?)


Man I did. Blew an inner tube on my front tire during a BMX race once. Had about 10 minutes to get it fixed before my next heat. Sent my buddy up to the bike shop that was right near the track to get one for me. I barely made it to the starting gate for my next heat but I forgot one important little detail. I forgot to tighten the nuts holding the wheel to the forks. They were only finger tight. I came off the the third jump on the track which was an 8 foot table top jump and my front wheel decided to leave my bike at that point. I vaugely remember hitting the ground, then waking up with my bike on top of me and 3 people standing over me asking me if I was OK. Evidently the seat on my bike hit me in the back of my helmet the SECOND time my head hit the ground and knocked me out.

It hurt.:aok
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Offline mentalguy

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Road Bike versus Mountain Bikes
« Reply #10 on: July 19, 2007, 11:31:30 AM »
Quote
Originally posted by bj229r

(Didn't EVERybody have concussions when they were kids?)


I haven't, I had to feel the pain.


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Offline eskimo2

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Road Bike versus Mountain Bikes
« Reply #11 on: July 20, 2007, 08:58:07 PM »
I took my bike to the local shop last night.  I’m replacing the busted up 46 tooth big front gear with a 50 tooth, and the rear cassette 13 (smallest) with an 11 and a new chain.  That should change the ratio from one crank revolution turns the wheel 3.54 revs to 4.55 revs.  That’s about 29% higher/faster.  If I’m still greedy for speedy I’ll look at faster tires later.  I should get the bike back Monday.

Offline Replicant

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Re: Road Bike versus Mountain Bikes
« Reply #12 on: July 21, 2007, 03:22:01 PM »
Quote
Originally posted by eskimo2

So, my questions are mostly for those of you who know both road and mountain bikes:
How much faster is a road bike over a mountain bike (with street tires)?  
How much harder are they to control in less than ideal surfaces?
Is there anything decent out there in the $300-$500 range (new or used)?  
Where would you shop?
Would you even recommend a used bike for a road newbie?
Would I be better off just finding a higher/faster set of gears and tires for my old Giant mountain bike?


Have you thought about a hybrid/sports-bike?  I bought a Scott hybrid last year (lightweight, looks like a MTB but has 700c wheels).  The one I have only has 21 gears but you can get ones up to 27 and maybe more if you get a different cassette.  I usually do 13 miles a day on smooth-ish paths/roads and quite frequently I end up cycling alongside road bikes at around 20+mph.  I've cycled up to 28mph on the flat but I really need higher gearing to go any faster.  Off road it isn't too bad and fairly stable as I used to cycle through a forest on rough stone paths.  I've had a few punctures and a few falls if the stones are a bit too loose.  This is probably where the MTB would be more stable but then I was cycling perhaps a little too fast.  At the moment I'm using it indoors on a TACX machine after recovering from fracture ribs (bike fall!) lol ;)
« Last Edit: July 21, 2007, 03:28:14 PM by Replicant »
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Offline Shuffler

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Road Bike versus Mountain Bikes
« Reply #13 on: July 23, 2007, 09:30:31 AM »
I still have my Miata Mountain bike... hardly ever ride anymore. I even rode in 2 road rides.... one from Houston to Austin and the other Houston to San Antonio. Both were alot of fun.

The bike is a Miata Elevation 200 with the torque sprocket. Back in the day it was about $1100.
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