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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 12-17-06, 07:20 AM   #1
shogun17
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Mavic 631 cranks.

Whats the general opinion on Mavic 631 cranks. I think they look sweet and with the single bolt system and semi-adjustable chainline could make a good set of fixie cranks.

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Old 12-17-06, 11:26 AM   #2
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Only if you want a 52X20 gearing.
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Old 12-17-06, 11:31 AM   #3
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They take standard road chainrings... you can just swap em out.
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Old 12-17-06, 12:27 PM   #4
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Stiffest cranks I've ever ridden. Totally rad, but won't take a chainring smaller than 48t. Adjustable chainline?
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Old 12-17-06, 12:39 PM   #5
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IMHO they're hideous.
and yeah adjustable chainline what?
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Old 12-17-06, 12:59 PM   #6
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Quote:
Originally Posted by baxtefer
IMHO they're hideous.
and yeah adjustable chainline what?
New pet peeve: People using words like "hideous" in their "humble opinion". You're welcome to your opinion, but if you want to be humble about it, try something like "not attractive" rather than hideous, and if you're not interested in presenting your opinion humbly, don't pretend to do so.

MHO FWIW
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Old 12-17-06, 01:38 PM   #7
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I know nothing about them, but I think they are ugly and cheap looking.
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Old 12-17-06, 01:53 PM   #8
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"Ugly" seems to be the public opinion then because I don't like them, either...
But if you like them, why not? I admit it's a nice touch that the chainring bolts are hidden.
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Old 12-17-06, 02:51 PM   #9
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H for honest? who said anything about being humble?
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Old 12-17-06, 03:00 PM   #10
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on the right bike i think they look rad.



^^vomitrons
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Old 12-17-06, 05:20 PM   #11
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Semi-adjustable chainline because you cann add spacers to bring the cainring closer to the frame, and you can't see the difference, unlike normal road doubles.
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Old 12-17-06, 05:22 PM   #12
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They are hot, hot cranks. Ugly? wtf!

Run em if you got em. If you hate them, send them to me.

As for the chainline, is the mavic bb like phil or Miche, i.e. 2 adjustable cups?
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Old 12-17-06, 06:20 PM   #13
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Mavic made a cartridge bottom bracket that didn't use the threads in the frame. Instead, the cartridge is threaded and one tapered lockring threads on each side, sandwiching the BB shell in between. It's adjustable to an extent.

The downside to this, is that the BB shell has to have tapers cut on the sides, using a special tool. The upside is that you can use it in a shell with completely destroyed threads of any type. They are hard to find, and not all shops will have the tool to cut the tapers in the shell. I've heard that they put some strange stresses on the BB shell also.
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Old 12-17-06, 06:23 PM   #14
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I have a set kicking around but I'll never use them. They are neat, but not my thing. IMHonestO, they look like pie plates.
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Old 12-18-06, 08:08 AM   #15
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Quote:
Originally Posted by Cynikal
Only if you want a 52X20 gearing.
... and why the hell not?

I freaking love the look of those cranks. It's like robocop for your bike.
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Old 12-18-06, 08:15 AM   #16
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i got a broken set in my garage.

the driveside cracked where the arm hits that crazy external spider.

they were really cool for 6 months before they died...

btw they cracked in use as a geared crankset so they might not be the strongest (or i got a bunk set).

i still run the rear d fom that gruppo on my gf's commuter. nice stuff!
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Old 12-18-06, 08:57 AM   #17
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I've never used them but I've always liked them and I have never used a Mavic product that has not been of the most exceptional quality...

If people don't want em send em my way! I'd like to build a geared time trial bike with as full of a mavic group as possible some day. Right now I just have the bars and rims
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Old 12-18-06, 09:57 AM   #18
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Quote:
Originally Posted by Shiznaz
I'd like to build a geared time trial bike with as full of a mavic group as possible some day. Right now I just have the bars and rims
i got the brake levers... i'll trade you sumpin for them!
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Old 12-18-06, 10:20 AM   #19
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Quote:
Originally Posted by Aeroplane
... and why the hell not?

I freaking love the look of those cranks. It's like robocop for your bike.

Upon first look, I didn't think you could get any chain ring in the 40's past the crank spiders. This is a question of mere aesthetics. Not my style, but rock them if you dig them. If they are Mavic, then they are probably great cranks.
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Old 12-19-06, 01:08 AM   #20
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Quote:
Originally Posted by Cynikal
Upon first look, I didn't think you could get any chain ring in the 40's past the crank spiders. This is a question of mere aesthetics. Not my style, but rock them if you dig them. If they are Mavic, then they are probably great cranks.
Let us set aside speculation. I own these cranks, and I have owned other sets of them. They are my favorite cranks for the following reasons: stiffness, q-factor, straightness (easy to sight if it's crooked), looks, rarity (in that order). They don't look good on every bike, but I ride stupidly ridiculous pursuit bikes, so what do I know (PS have you seen my ridiculous tights?).

They don't take anything smaller than 48t, but they're pretty much the stiffest cranks ever. They don't come in black, but they take a powdercoat (though my guy said he had some trouble with bubbling, who knows). Supposedly, they come in lengths other than 170 but that's just hearsay from one dude. I would kill for a 180mm set. Please let me know if you come across a pair.

Also, it was margarita monday, so go *** yourselves.
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Old 12-19-06, 01:13 AM   #21
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you need to come to sf again, man.
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Old 12-19-06, 05:24 AM   #22
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There's some 172.5s on UK ebay at the moment and a friend of mine has 165s, although one of the chainbolt threads has stripped a bit.
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Old 12-19-06, 09:05 AM   #23
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Quote:
Originally Posted by vomitron
(PS have you seen my ridiculous tights?).
POST THEM AGAIN!
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Old 01-14-07, 07:05 AM   #24
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hello, i´m the new guy here.
are the mavic cranks for jis or iso bb? i would think iso but im not sure.
i have an syntace adjust able bb is the axle of this iso or jis?
thanks a lot
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