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Extralite parts okay? Crank specifically
http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=112393
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Author:  bobqzzi [ Mon Feb 11, 2013 2:55 am ]
Post subject:  Extralite parts okay? Crank specifically

Hi.
I'm building a dedicated hill climb bike for Mt. Washington where the time penalty is about 30 seconds per pound.

I'm going to run either a single 20 or 22T chain ring which requires 64mm BCD. Obviously shift quality and bearing durability are not issues. loose or broken cranks would be.

Frame will be a PF-30

The Extralite e-bones W (479 grams advertised) look pretty good to me.

Any experience as far as quality?

Any better alternatives?

Author:  theremery [ Mon Feb 11, 2013 8:11 am ]
Post subject:  Re: Extralite parts okay? Crank specifically

They are not extralite's finest work. The company builds good gear but the e-bones are quite an old design. See madcow's review on cranks...it is VERY comprehensive.

Author:  Weenie [ Mon Feb 11, 2013 8:11 am ]
Post subject:  Re: Extralite parts okay? Crank specifically


Author:  Tokyo Drifter [ Mon Feb 11, 2013 8:55 am ]
Post subject:  Re: Extralite parts okay? Crank specifically

no

Author:  bobqzzi [ Mon Feb 11, 2013 9:43 am ]
Post subject:  Re: Extralite parts okay? Crank specifically

theremery wrote:
They are not extralite's finest work. The company builds good gear but the e-bones are quite an old design. See madcow's review on cranks...it is VERY comprehensive.


Tried the search but can't seem to find the review. Could you link me please

Author:  jooo [ Mon Feb 11, 2013 6:27 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

The MTB E Bones have a Qfactor more than 20mm wider than the road version. Is that an issue for you? Other than that, nothing to worry about.

Have you thought about Lightning or Specialized road cranks and using a Lightning 104/64 spider?

Author:  Cheers! [ Mon Feb 11, 2013 6:57 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

http://fairwheelbikes.com/forum/viewtop ... =77&t=7916

Author:  bobqzzi [ Mon Feb 11, 2013 8:11 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

jooo wrote:
The MTB E Bones have a Qfactor more than 20mm wider than the road version. Is that an issue for you? Other than that, nothing to worry about.

Have you thought about Lightning or Specialized road cranks and using a Lightning 104/64 spider?


I hadn't- traditionally I just use Shimano stuff for my road and mountain bikes- but I'm inspired to build a ~10 pound bike for this ride.
Q factor isn't an issue- I use MTB triples on everything pretty much.

I'll look into those- thanks for the reference.

Author:  prendrefeu [ Mon Feb 11, 2013 8:20 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

Necessary research:
viewtopic.php?f=3&t=76357

Author:  bobqzzi [ Mon Feb 11, 2013 8:33 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

prendrefeu wrote:
Necessary research:
viewtopic.php?f=3&t=76357" onclick="window.open(this.href);return false;


Thanks!

Author:  Privateer [ Tue Feb 12, 2013 1:36 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

I have the road version and can't fault them. Madcow's test doesn't seem too critical of them to me - they are among the lightest in the test, and while the stiffness to weight ratio doesn't seem very impressive I don't notice any flex in mine.

Author:  WMW [ Tue Feb 12, 2013 5:52 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

bobqzzi wrote:
I'm building a dedicated hill climb bike for Mt. Washington where the time penalty is about 30 seconds per pound.


Thought about fixed gear?

Author:  cerro [ Tue Feb 12, 2013 7:12 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

Hollowgram SiSL with a one-piece chainring?

Author:  bobqzzi [ Tue Feb 12, 2013 10:22 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

WMW wrote:
bobqzzi wrote:
I'm building a dedicated hill climb bike for Mt. Washington where the time penalty is about 30 seconds per pound.


Thought about fixed gear?


Yes, but rejected it immediately- the grade varies enough (8% to 22%) to require different gears. Any time gained from weight reduction ( 1 rear cog and no brakes, rear derailer) you (or at least I) more than give back with less than optimal gears at certain spots.

I'm going to run the 4 top cogs from a 9 speed XTR cassette (34/30/26/23) which shoudl give me the proper range of speeds with a 20 or 22T front.

Good thought though

Author:  bobqzzi [ Tue Feb 12, 2013 10:37 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

cerro wrote:
Hollowgram SiSL with a one-piece chainring?


I assume that I would have to have such a chainring custom made or is there one currently produced?

Author:  prendrefeu [ Tue Feb 12, 2013 10:59 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically

They're available via HomeBrewed Components (or Fibrelyte, but contact them)

Homebrewed Components.

Author:  Weenie [ Tue Feb 12, 2013 10:59 pm ]
Post subject:  Re: Extralite parts okay? Crank specifically


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