Endurance Bike
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Thread: Endurance Bike

  1. #1
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    Endurance Bike

    So my old bike has an original Di2 10s, and I want to go to a 34 cassette.....
    Probably end up costing over $1K... new RD, jbox, battery, wheel, cassette & crank (maybe could get by with the old crank, but). Cause Shitmano will not make a long cage Di2 10s any longer.

    So, now the new Endurance Bike, they look like I can get what I want, except for threaded BB. I looked at Trek, Fuji, Pino, Giant and a few others all with pressed fit.
    Looks like I'm going to have to go with a pressed fit. The Fuji price is good, but has a praxis BB, are those ok?
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  2. #2
    JSR
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    I think I read the new Specialized Roubaix has a threaded bottom bracket. (?)

    Yep, alt least that’s what Velonews article says. https://www.velonews.com/2019/04/bik...-gender_492414

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    Those are nice bikes, little too spendy!
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    Thought that was interesting about the Roubaix also.
    Anyway, I have a couple of road and mt bikes with pressfit bb's and I've used both the Praxis Works and Wheels Mfg threaded adapters without a problem or creak.
    I'm sure the more knowledgeable will chime in but to me, they're an effective solution to a lot of creaking problems many complained about with pressfit bb's.
    In reference to the Assault on Mt Mitchell...
    Quote Originally Posted by merckx56
    The easier solution is to find a biker bar in Spartanburg the night before, go in and pick a fight. The ass-whipping you'll get will be far less painful than the one Mitchell will give you the next day!

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    Quote Originally Posted by upstateSC-rider View Post
    I have a couple of road and mt bikes with pressfit bb's and I've used both the Praxis Works and Wheels Mfg threaded adapters without a problem or creak.
    I've got nearly 40K miles on a Praxis press fit BB in a Ti frame with ZERO issues.

  6. #6
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    I've heard more problems with some PR30 set ups. Haven't had any issues with my Niner using a Wheels Manufacturing 24mm adapter so I could use a shimano crank. No problems with my Domane frame PF90 (which as well over 20,000 miles on it).
    Last edited by Srode; 5 Days Ago at 12:15 AM.
    Gravel Rocks

    Trek Domane
    Niner RLT9 (Gravel Bike)
    Trek Crockett

  7. #7
    T K
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    Bianchi Intenso, threaded bb and electronic shifting compatible. That would probably be my choice if going carbon.

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    Bianchi Intenso, that is another great looking bike….
    It lists a Ultegra Di2 RD-R8050 SS 11sp, with a 30 cassette, will this handle a 34?
    It lists a PF86 bottom bracket, is that threaded?

    The Specialized is crazy $$, I could get a big KTM for that $$. The Bianchi isn’t cheap, I could get a small KTM for that $$.
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  9. #9
    T K
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    I think you are looking at the Infinito not the Intenso.

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    Quote Originally Posted by T K View Post
    I think you are looking at the Infinito not the Intenso.
    U are right, but I was leaning for Di2 (or etap), which is the Infinito. On a retail site it lists the BB as a "Shimano BB-R60" what ever that is.
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  11. #11
    T K
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    [QUOTE=duriel;5308211]U are right, but I was leaning for Di2 (or etap), which is the Infinito. On a retail site it lists the BB as a "Shimano BB-R60" what ever that is.[/QUOTE
    Are you looking for rim brakes or disc? Intenso comes either way. And threaded bottom bracket. The price for the 105 seems low enough you might be able to upgrade it to electronic and still come out looking good. Damn those press fit bottom brackets. Nice to see a carbon bike from a major manufacturer that offers an English BB.

  12. #12
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    Get a Moots Vamoots DR. Endurance geometry, external cable routing, disc brakes, the option for threaded bottom brackets, tapered head tube, and serious street cred in any group setting.

    I had one built up with Ultegra hydraulic and a lot of Moots/Chris King bling. Really a pretty bike, and it was certainly a comfortable, all-day ride. Unfortunately, my palate leans towards the racier side, so I let it go to a guy who would use it like it should be.

    At this point, semi-custom is fast becoming the last remaining bastion of the easily-maintained bike. If Specialized is moving back to the English thread BB, it's hopefully a positive sign. I'm not holding my breath, though. Form always has trumped function for the major manufacturers.

  13. #13
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    Quote Originally Posted by Srode View Post
    I've heard more problems with some PR30 set ups. Haven't had any issues with my Niner using a Wheels Manufacturing 24mm adapter so I could use a shimano crank. No problems with my Domane frame PF90 (which as well over 20,000 miles on it).
    I have a 2014 Synapse Carbon with BB30 and the same Wheels Manufacturing 24mm adaptor so I could use a Shimano crankset. 8,500 miles and not a peep out of that BB.
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    “Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein



  14. #14
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    The Roubaix is indeed threaded, I think the prior generation was threaded as well.

    Reading up on press fit, it seem like there are a number of factors to consider:

    1. Manufacturing tolerance. Long story short, certain brands seem to build to a tighter tolerance, leading to fewer problems. Hambini did a nice study on this recently:
    https://www.hambini.com/blog/post/bo...ering-opinion/

    Based on Hambini's analysis, Trek and Cannondale are notably problematic, Giant, Time and Look are notably good. This jibes with what I've heard anecdotally from mechanics I know and what I've seen in people I ride with.

    2. Some press fit BB standards seem inherently better than others. BB30 has a tricky combination of requiring particularly precise manufacturing and having a relatively narrow bearing stance, introducing more lateral load on the bearings. PF30 sought to address the tolerance issue by introducing delrin bushings into the system but doesn't fix the stance issue. Both standards aren't great. BB86/BB92 seems far less problematic in general. Note that it's still the only standard that Shimano supports and they generally do very thorough testing.

    3. BB / bearing manufacturer. In general, SRAM press fit BBs seem to suck.

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