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-   -   Review on the GMC Denali bicycle (https://www.bikeforums.net/commuting/237231-review-gmc-denali-bicycle.html)

Lurker1999 02-01-07 06:43 PM

Attack the man, attack the bike. No matter what he does, he clearly can't win with you people.

I-Like-To-Bike 02-01-07 06:58 PM


Originally Posted by Lurker1999
Attack the man, attack the bike. No matter what he does, he clearly can't win with you people.

Didn't know it was possible for a review or reviewer to win, or lose. Take Cig's comments for what you think they are worth, no more, no less. I thought his comments were interesting.

lyeinyoureye 02-01-07 07:12 PM

purple nurple

ModoVincere 02-01-07 07:44 PM

At least the bike is still working and Cig has not died some horribel face plant death due to the many predicted mechanical failuresthat did not arise.

Scientific, methodical, reliable are not words that describe this test, but it does go to show that you do not have to have some super expensive bike to commute on day in and day out.

No Exit 02-01-07 10:29 PM

FWIW I think Cig got his money's worth out of the bike.... and it's still going. Even if the average person doesnt get 2k miles out of this $150 bike, how much is it worth in wrenching experience? I think in the end, he proved what a LOT of (enter PC term here) X-mart bike commuters prove every day... that you can pretty much ride anything as transportation. He added his opinions - which is essentially all a review is. Like it or not, even if you dont agree with all of his conclusions, you have a better understanding of this particular bike without ever having to buy or ride it.

btw, I appreciate the time he put into this thread. It's made for good reading and Cig is always more than willing to share his experiences and advice with others. Nobody is forced to read what he writes.

carlton 02-01-07 10:39 PM

CigTech,

I thank you for your response on the handlebars. Correct me if I'm wrong. I'm seeing by your drawing and photo that the middle of the bars are a smaller diameter (mtb size) and the outer parts (hoods and drops) are larger size (road bar size). After removing the bolt through the bar you would be able to remove one shifter. If you then removed the clamp on the stem then the other shifter could be removed. Are my assumptions correct mastro?

BluesDawg 02-03-07 08:57 AM

Thanks to Cig for an interesting read. It definitely gives me something to challenge my preconceptions about bikes like this. Not that it would make me consider buying one or recommend that someone else buy one. There's just too many nice 80s steel bikes out there looking for a good home. But if I come across someone riding one of these bikes I won't automatically assume he or she is an idiot and has made a horrible mistake. But I'd sure check to see if the brake pads were on right.

BTW, I like the bank drive-in story. Nice reaction! :beer:

CigTech 02-04-07 06:07 AM

Like some one said long ago "you can't please all the people all the time".

The handlebars are the same (MTB bike) size all the way across the top bar. But the middle is shimed to fit the road one piece headset. And this is why the cheap brake levers keep moving up and down the bars. Because the brake levers clamps are sized for road bars. I am checking them at least every two weeks to make sure they are still tight. And won't move around on the bars.

tlupfer 02-04-07 10:19 AM


Originally Posted by CigTech
First the handle bars. They cut them in half and then welded a piece of tubing into the left side. Them slid the right side bar onto the tube. Drilled a bolthole through the right side piece and the tube. Installed a bolt through the hole. Then a two-piece around shim to make it the right size for the headset. It has not failed as of yet. I took them off last week to see if they where bent at all. And they are still true and striate. But I do still think that if any part is going to fail it will be the bars.

To say that if you take a wrench to a bike that it is not a Trek, Denali, Grant, or whatever that it's not a Trek, Denali, Grant, or whatever any longer. So the first time you get a flat and have to remove the wheel to fix it, then it's no longer a whatever (Brand name bike)******************** And have you never adjust the seat or handlebars on a new bike at all.... Or adjust the Break pads********** Then you’re not a commuter or biker.

As far as replacing any parts. I have not yet changed any parts out.

And yes I am fast on any bike. I know most people ride between 10 and 15 mph. However I am not most people.
http://www.filehigh.com/viewvid.php?f=31791&i=333184
As you can see from the above video I am fast. My wife was out taking a video of the son on his new bike and I happened to go flying by. I was coming in form a 12-mile ride when She was making the video. My average speed for that ride was 23.6 mph over the 12 miles. I hope this will put to rest the speed issue.

Here is a drawing of the handlebars.

wow. if that was just a normal start/stop commute speed on a denali without aero gear, sounds like you could do a 40k time trial in about 45-50 minutes! you should be selecting between the multitude of pro teams that ought to be clamoring to sign you.

stevo9er 02-04-07 10:34 AM

My first though was, oh **** Nick Nolte rides a Denali!

matimeo 02-04-07 04:23 PM


Originally Posted by tlupfer
wow. if that was just a normal start/stop commute speed on a denali without aero gear, sounds like you could do a 40k time trial in about 45-50 minutes! you should be selecting between the multitude of pro teams that ought to be clamoring to sign you.

That's only about 18 miles and hour. I've done that on 30 mile rides on a 35 pound steel bike when I very first started riding. Exactly what is your point? That's hardly fast enough for a pro team to care about you.

tlupfer 02-04-07 06:44 PM


Originally Posted by matimeo
That's only about 18 miles and hour. I've done that on 30 mile rides on a 35 pound steel bike when I very first started riding. Exactly what is your point? That's hardly fast enough for a pro team to care about you.

you should check your math.

40km = 24.85miles
48kph = 29.82mph

my point is that averaging 24mph on an average commute would mean that on a tt bike, on a closed course, with aero gear he could probably post a time that would allow him to get a job as a cyclist. I was simply impressed.

matimeo 02-04-07 07:58 PM


Originally Posted by tlupfer
you should check your math.

40km = 24.85miles
48kph = 29.82mph

my point is that averaging 24mph on an average commute would mean that on a tt bike, on a closed course, with aero gear he could probably post a time that would allow him to get a job as a cyclist. I was simply impressed.

40km (or 24 miles) in 45 minutes= 24x.75= 18mph
Thus, according to your original statement, at best he would be going 18mph if he went 40km in 45 minutes. I guess I should have shown my work.

nasiralpharia 02-04-07 08:49 PM


Originally Posted by matimeo
40km (or 24 miles) in 45 minutes= 24x.75= 18mph
Thus, according to your original statement, at best he would be going 18mph if he went 40km in 45 minutes. I guess I should have shown my work.

Now I don't claim to be a math wiz either, but... If you are travelling at 18 mph, in one hour you cover 18 miles. How then do you cover 24 miles in 45 minutes and still only be going at 18 miles an hour?

tlupfer 02-04-07 08:56 PM


Originally Posted by nasiralpharia
Now I don't claim to be a math wiz either, but... If you are travelling at 18 mph, in one hour you cover 18 miles. How then do you cover 24 miles in 45 minutes and still only be going at 18 miles an hour?

I'm confused too. I think that's a light saber in his avatar though. maybe it's a jedi thing.

bjkeen 02-04-07 09:06 PM

Multiply, divide, whatever!

matimeo 02-04-07 09:14 PM

good point. my bad. I always mix up multiplying and dividing. That would have him going 32 miles an hour. Did he say he could do that over 40km?

nasiralpharia 02-04-07 09:18 PM

I do believe a commuter could go that fast though. I remember last summer I was climbing a long moderate grade on my hybrid with no gear going at about 12 mph. Well a guy passed me wearing one of those huge camping backpacks, he went by so fast I thought I was standing still. I know he was going over 20. When he passed he spoke and smiled like he wasn't even breathing hard. I believe that their are good athletes out there who just don't have the aspiration to do their sport full time. Maybe Cigtech likes his regular job, home and all that stuff and doesn't want to compete.

tlupfer 02-04-07 11:36 PM


Originally Posted by matimeo
good point. my bad. I always mix up multiplying and dividing. That would have him going 32 miles an hour. Did he say he could do that over 40km?

I doubt it. I was just projecting from the figure that he gave of averaging 23.6mph on his commute. average speeds (I'm assuming this is based on a compute reading) typically include at least some amount of starting and stopping, and combined with his choice of equipment, 28-30mph on a closed course with proper equipment does not seem unreasonable. that would put him up there with some of the best in the world.

as an example, the guy who finished last in the final time trial of last year's tour de france averaged around 26mph. mr. cigtech is only 2.4mph off that pace on his denali! sure, the distance was a bit shorter, but that's still a mighty effort.

bdinger 02-05-07 09:35 AM

I dunno, I've passed Madones on my badass -n- black SPecialized Hardrock. And I've had a moving average (note, only while I was moving derr) of 18mph on said bike. Not bad with a tubby rider, big stupid MTB tires and big stupid MTB suspension.

Perhaps, I know this is a interesting shot of logic, he posted his moving average speed? Like, you know, what most bike computers/GPSes will do - give you a average speed when you are moving? That seems much more reasonable.

If not, and he claims 23.6 over 12 miles as a whole.. I'm calling bull****.

CigTech 02-07-07 12:08 AM

May Average computed speed is around 22.5-mph for long rides (25 and above miles). For short rides it's a lot higher around 26.5-mph.

Well still looking for shifters. Have not changed any parts out yet. The shifters will be the main change. But I want to add Higher gears for better speeds. I have 2714.6 miles on the Denali so far and still have not has a brake down yet.

greenstork 02-07-07 12:17 AM

I don't mean to sound rude but an average speed of over 26 mph is somewhat absurd. This is what pros ride on the flats outside of the peleton. Seriously, if you're riding that fast, why don't you head over to Europe and get yourself signed.

My speculation is that your computer isn't calibrated correctly. What kind of computer is it and have you input your wheel diameter into it?

mastershake916 02-07-07 12:17 AM

I'll take a look at the shifters.

sonatageek 02-07-07 06:14 AM

I sort of wonder if the cycle computer is fully and correctly calibrated. My feeling is that it may be off slightly, and the speed may be very fast, but a few mph slower than is being shown.

Just a thought.

Oh, and I have really enjoyed reading the thread.

I-Like-To-Bike 02-07-07 06:25 AM


Originally Posted by sonatageek
I sort of wonder if the cycle computer is fully and correctly calibrated...
Oh, and I have really enjoyed reading the thread.

Maybe it is perfectly calibrated - for kilometers per hour. Either way the OP's real speed is irrelevant to the gist of his review of the bike. Nobody is going to buy this type of bike expecting to set speed records.

I also enjoyed the review.


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