john
At 130 lbs and if wanting low Q factor don't count out square taper. Get a
phil wood and your good for decade or more.. Can easily get under 135 mm q with
the right crank and bb and front derailleur combination. I actually have
a triple with 142mm. Low q also means better cornering and aerodynamics..
On Sunday, December 30, 2012, wrote:
> Actually, the pedal-to-pedal distance isn't any narrower on a BB30
> crankset (they still need to be wide enough to clear the chainstays). If
> you have problems scraping your heels on the center of the crank, the BB30
> is narrower there.
>
> I'm personally a big fan of the external bearing options (especially
> Shimano's). The BB30 bearings are harder to install/remove and it has been
> my experience that they have a far shorter lifespan. Additionally, you can
> get a Chris King bottom-bracket for the external standards, whereas they
> don't make one for BB30 (although I hear a PF30 is in the works).
>
> --
> Aaron "Rambo" Harrison
>
> ----- Original Message -----
> From: "eric aldinger" >
> To: "Ryan Storfa" >
> Cc: "obra" >
> Sent: Sunday, December 30, 2012 1:20:36 PM
> Subject: Re: [OBRA Chat] BB30 vs external, 15 mm vs QR, 142 vs 135 mm?
>
>
>
> At 130 lbs, I doubt you would notice the theoretically stiffer bottom
> bracket provided by the BB30 implementation. For someone with your assumed
> narrower hips, you would benefit from the BB30's reduction in Q factor (the
> distance between the threaded holes in the cranks, think distance between
> each cleat as attached in your pedals). This would produce a more
> ergonomically correct pedal stroke, and reduce potential stress on the
> knee, ankle, or hips. I prefer external cups because I like the aesthetic
> dimension they add to a frame, but the Q factor reduction is a serious
> reason to prefer BB30 for some riders.
>
> references
> http://www.bb30standard.com/
> http://en.wikipedia.org/wiki/Q_factor_%28bicycles%29
>
>
>
>
>
> On Sun, Dec 30, 2012 at 8:38 AM, Ryan Storfa < storfar@hotmail.com> wrote:
>
>
>
>
>
>
>
>
> I'm looking to upgrade my mtb frame for the first time in a while and I
> see about a bazillion different standards out there now.
>
>
> Bottom Bracket: BB30 vs the external bearing versions (I'm ignoring BB90
> for now)? I have zero knowledge of pros/cons of BB30 other than I would
> assume it is stiffer due to the larger diameter. Any experience of 1 vs
> the other? Maintenance, longevity, performance, compatibility? For
> background info, I'd like to run 1x10 and I'm in the low to mid 130 lb
> range so super uber stiffness isn't a huge concern.
>
>
> Front Axles: I think I've settled on a 15 mm thru axle for stiffness and
> Stans makes wheels compatible with either the old QR or 15 mm by using $15
> adapters. Am I missing anything?
>
>
> 142 vs 135 mm: Again, it seems like Stans makes relatively cheap adapters
> to go from 135 to 142 on the back but does 142 mm get me anything other
> than added stiffness? Is that the "new, new standard" so I may as well go
> with it now or else the bike will be obsolete in 3 years?
>
>
> Th oughts?
>
>
> Ryan
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>
>
> --
> Eric Aldinger
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