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2021 superbike prices

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    #32
    Chips Lovell
    Moderators, Politics Moderators, Sports Moderators Posts: 24,266 Mod ✭✭✭✭Chips Lovell


    JimmiesRustled wrote: »
    Also, this is probably an unpopular opinion on here but, threaded BB's on Carbon frames can be garbage. They're bonded in and can, in some instances, come away from the frame as the frame is Carbon with an aluminium insert.

    That's the theory, but the practice is that inserts coming away from frames is rare, but poor build quality on press fit bottom bracket shells means that endless fiddling trying to find the right combination bottom bracket and retaining compound is quite common.


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    #33
    at1withmyself
    Registered Users Posts: 2,477 ✭✭✭at1withmyself


    Diarmuid wrote: »
    I don't think so. The component manufacturers are the ones doing the R&D, Bike manufactures are glorified assemblers.

    Eh they manufacture the frames which need the R&D, this costs money. To call them glorified assemblers is too generic for all manufacturers, some of them do lot of developing, might not always be the best development but regardless this costs money


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    #34
    JimmiesRustled
    Registered Users Posts: 290 ✭✭JimmiesRustled


    Chips Lovell wrote: »
    That's the theory, but the practice is that inserts coming away from frames is rare, but poor build quality on press fit bottom bracket shells means that endless fiddling trying to find the right combination bottom bracket and retaining compound is quite common.

    I'd have more confidence with bike manufacturers to create a press fit bb than a bonded insert for a threaded bb and that's not saying much.

    You'll have the same issues with threaded. Misalignment, creaking, concentric etc. Everyone seems to remember great things about threaded BB's all because we mostly rode them growing up. Next to all of these were in alu or steel frames where the formation of the ope for the BB was and still is much easier than the formation of the same ope in carbon. The bearing seats are machined out on alu and steel while carbon is created with the seats which leads to issues.

    That's not even getting into the fact that you may have a 386 crank. As standard most threaded BB's are Ø24mm with 68mm width. You now need adaptors/spacers for the length as well as a specific bottom bracket.


    The problem isn't the fact that specialized and trek are going back to threaded, although I personally have issues with it, It's the fact that there are so many "standards" of bottom bracket. BSA, ITA, BB30, PF30, BB386 Evo, BB86, BB92, OSBB, SRAM DUB, T47.

    Every single one claim to be better than the last and now all of a sudden we're back where we more or less started and apparently that's part of the R&D we're having to fork out for? Are they going to turn around in a year or two and tell us that square taper bottom brackets, light bikes and skinny tires are all faster?


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    #35
    Chips Lovell
    Moderators, Politics Moderators, Sports Moderators Posts: 24,266 Mod ✭✭✭✭Chips Lovell


    JimmiesRustled wrote: »
    Everyone seems to remember great things about threaded BB's all because we mostly rode them growing up.

    They're not that ancient. There's loads of people (me included) riding bikes with threaded BB shells. I know it's anecdotal evidence but it's anecdotal evidence based on current experience rather than nostalgia.

    For me anyway, nobody has yet improved on Ultra-Torque. I'd say it's around 14 years old now. Cups you rarely, if ever have to replace. Bearings last an age. Single bolt crank mounting. A doddle to swap between bikes.


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