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why are bmx drive trains so expensive?

Old 11-10-07, 10:36 AM
  #1  
makeinu
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why are bmx drive trains so expensive?

I have an internal gear hub on my bike and I was thinking of using a BMX crankset, but I noticed that they are significantly more expensive than regular cranksets.

What's the deal? Any good affordable BMX cranksets out there?
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Old 11-10-07, 11:14 AM
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I recently converted my BMX bike into a three speed. I was able to find a Stumey Archer hub at a good price.
I kept the crankset the same.
But what I wanted to say is, the BMX crankset does NOT have the usual square taper bottom bracket.
It has a Splined bottom bracket.
So you would be looking at replacing the BB , too?
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Old 11-10-07, 12:18 PM
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simple....they are made tough.
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Old 11-10-07, 12:21 PM
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Originally Posted by hotbike View Post
I recently converted my BMX bike into a three speed. I was able to find a Stumey Archer hub at a good price.
I kept the crankset the same.
But what I wanted to say is, the BMX crankset does NOT have the usual square taper bottom bracket.
It has a Splined bottom bracket.
So you would be looking at replacing the BB , too?
Yeah, actually I was looking to replace my BB.

Originally Posted by live4muzic2 View Post
simple....they are made tough.
Yeah, but are they as tough to wear as they are to impact? I don't want to spend $100 on a chainwheel if I'm going to need to replace it every year (as I would with a regular chainwheel).
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Old 11-10-07, 12:23 PM
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depends....racing or freestlyle and what sprockets/cranks are you looking at?
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Old 11-10-07, 12:51 PM
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Originally Posted by live4muzic2 View Post
depends....racing or freestlyle and what sprockets/cranks are you looking at?
Well, I don't know. I'm looking to replace the whole front of my drivetrain ("singlespeed").

I need a chainring around 30-38T and I'm looking for weather resistance, so I guess I'll need a sealed bottom bracket. Durability (in terms of impact resistance and wear...and I'm not talking about pedaling around the skate park, but thousands of miles) are a priority as is a full bashguard.

Price might not be that much of an issue if it weren't for the fact that I really don't want to waste money on something I won't be happy with.

Can you recommend anything?
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Old 11-10-07, 01:27 PM
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I have to wonder why you want to spend more money on a BMX crankset as opposed to something actually designed for what you're planning on doing.
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Old 11-10-07, 02:16 PM
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Originally Posted by CMcMahon View Post
I have to wonder why you want to spend more money on a BMX crankset as opposed to something actually designed for what you're planning on doing.
Because nobody makes chainrings and bashguards specifically designed for folding bikes.
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Old 11-10-07, 02:29 PM
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Now I have to wonder why you would need a bashguard for a folding bike...
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Old 11-10-07, 02:47 PM
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Originally Posted by CMcMahon View Post
Now I have to wonder why you would need a bashguard for a folding bike...
Why wouldn't I?

Most people encase the entire bike in a giant hard suitcase. However, that seems rather silly to me when really the only part that isn't at least as bash-proof as the suitcase itself is the chainring.

I mean, what would you rather attach to your bike? The biggest, heaviest suitcase you can get your hands on or the toughest bashguard you can get your hands on?
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Old 11-10-07, 02:59 PM
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I would just get a bike that doesn't fold into a rectangle, personally.
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Old 11-10-07, 03:00 PM
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Tru dat
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Old 11-10-07, 03:03 PM
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Originally Posted by CMcMahon View Post
I would just get a bike that doesn't fold into a rectangle, personally.
Well, unfortunately, that isn't always possible; Due to either space limitations or rules.
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Old 11-10-07, 05:07 PM
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So, you're looking for a guard-type sprocket then? You might take a look at the Odyssey MDS, it's got a protective guard on one side, and you can buy another guard to screw on the other side for extra protection if you need it. The biggest is a 30t, and it's made out of 7075 aluminium.

https://www.danscomp.com/458044.php?cat=PARTS
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Old 11-11-07, 04:35 AM
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https://www.danscomp.com/452008.php?cat=PARTS#
would probably be ok. i like the macneil guard
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Old 11-12-07, 05:15 PM
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BMX drive trains are not any more expensive than any other area. If you look at sugino 75's, Race Face, etc. they are well over $200. The thing is, you get what you pay for.

I run a chrome set of profiles with a titanium spindle and bolts with magnesium pedals on my 29er. They will never, EVER break. (Plus I got them second hand dirt cheap) way cheaper than I could have gotten a nice set of single speed travativ cranks.
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Old 11-12-07, 08:14 PM
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why should it bend in a suitcase?!
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Old 11-14-07, 02:39 PM
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Originally Posted by sprintcarblue View Post

I run a chrome set of profiles with a titanium spindle and bolts with magnesium pedals on my 29er. They will never, EVER break.
why don't you just dare God to break them.
I run the raws and feel unsafe now having just READ your post.
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Old 11-14-07, 04:19 PM
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Old 11-14-07, 05:40 PM
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My good god thats tempting lol
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Old 11-14-07, 07:53 PM
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Originally Posted by jonly View Post
why don't you just dare God to break them.
I run the raws and feel unsafe now having just READ your post.
Bmx and MTB's put different stress on the components. There is a lot less lateral stress on a MTB because you're not doing spins or anything that will land the bike sideways and bend the spindle. On any bike but a BMX bike, profiles are bombproof. Sacrifices can be made in strength area's like adding the ti/magnesium parts. God PROBABLY won't break my cranks.

Something of a bit better explanation.
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Old 11-14-07, 07:55 PM
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