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  1. #1
    +++++++++++++++ xccx's Avatar
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    need new crank advice for fixed/free steamroller

    hi all....i'm building up a steamroller which i plan to run with a flipflop hub, fixed/free. i am confused on cranks and bb's. do i need to get a square-taper for it to be bomber? or is isis or octalink ok? io've heard that any splined system is a bad idea for fixed gear riding. (i'm not brakless tho...runnning a front brake).

    i'd prefer to run a road crank with 39:17 gearing...so if anyone can reccomend a good crankset that will work i would really appreciate it. at this point i know i need a 170, and i know my gearing....but dont know what to get!

    thanks in advance

  2. #2
    70mm4$!n! freeskihp's Avatar
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    Quote Originally Posted by xccx
    hi all....i'm building up a steamroller which i plan to run with a flipflop hub, fixed/free. i am confused on cranks and bb's. do i need to get a square-taper for it to be bomber? or is isis or octalink ok? io've heard that any splined system is a bad idea for fixed gear riding. (i'm not brakless tho...runnning a front brake).

    i'd prefer to run a road crank with 39:17 gearing...so if anyone can reccomend a good crankset that will work i would really appreciate it. at this point i know i need a 170, and i know my gearing....but dont know what to get!

    thanks in advance
    you might want to bump up the gearing if you plan on going downhill
    "The only reasons anyone should ever ride in the rain is because a) you’ve had your license to operate a motor vehicle suspended by the state. b) you’re in a bike race in which case you’re not allowed to use fenders anyway. c) you’re from Portland- in which case my main problem is with your neck beard- not your bicycle...If you need to train when it’s pissing rain- buy a trainer or one of those cheap charter flights to Mallorca."

  3. #3
    +++++++++++++++ xccx's Avatar
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    Quote Originally Posted by freeskihp
    you might want to bump up the gearing if you plan on going downhill
    gee thanks for the wisdom einstein.

    where i live it happens to be very hilly with lots of dirt/fire roads that i plan to ride with this bike.

  4. #4
    Geek Extraordinaire sivat's Avatar
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    If you're going to go the big tire/offroad route, you might want to run 165mm for pedal clearance. Though I suppose the fat tires will help with that.
    I'd rather have a bottle in front of me than a frontal lobotomy.

    Sintesi Conversion Serotta Track

  5. #5
    jack of one or two trades Aeroplane's Avatar
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    I'm going to throw in the obligatory recommendation to get a fixed-fixed flip-flop hub. You can still but a freewheel on it if you want, but if you strip one side's lockring threads (a common occurrence for first-timers), you aren't totally screwed.

    Either type of BB will work, but you will have an easier time getting your chainline set with a square-taper setup since they come in tons of spindle lengths.
    Quote Originally Posted by Dr Irwin Goldstein
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    the most irrational form of exercise I could ever bring to discussion.

  6. #6
    Senior Member
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    Quote Originally Posted by xccx
    gee thanks for the wisdom einstein.

    where i live it happens to be very hilly with lots of dirt/fire roads that i plan to ride with this bike.

    Considering you are asking for advice do not act like a jackass when poeple offer suggestions. Most people do not ride in Vermont.

  7. #7
    Senior Member mattface's Avatar
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    Quote Originally Posted by prodigal son
    Considering you are asking for advice do not act like a jackass when poeple offer suggestions. Most people do not ride in Vermont.
    I do, and 70 gear inches works great for me. 39:17 might be great for SS, but it will be very slow for the downhill portions fixed. I'd probably recommend a smaller cog for the fixed sideof the hub.

    As for the crank, I think splined cranks are fine for normal street/trail use. In fact they are used on the tracks as well. My take is that some folks are slower than others to let go of traditions and outmoded ideas.

  8. #8
    Senior Member mattface's Avatar
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    P.S. have you been to Old Spokes Home? they are very fixed friendly, and they can fix you right up.

  9. #9
    antisocialite dirtyphotons's Avatar
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    given your screen name, i assume we're talking offroad no?

    39 - 17 is an awesome offroad gear. mine's a 42-20.

    second the square taper, assuming you don't get very lucky (or buy new parts and do your homework and stil get a little lucky) you'll have a lot more options for replacing the bb.

    fwiw i think there are several folks on here that ride the hell out of their octalinks with no problems.

  10. #10
    shoot up or shut up. isotopesope's Avatar
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    www.chucksbikes.com has 6500 ultegra cranks in 170mm for 70 bucks, chainrings included.

  11. #11
    Geek Extraordinaire sivat's Avatar
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    I think the confusion came from the fact that the steamroller isn't usally considered an offroad bike. Perhaps the OP could have mentioned that he was going to be riding it in the dirt. As for dirty photon's advice, he is right about the square taper being easier to get a good chainline. If you are trying to use a double or triple crankset as a singlespeed, the bb length is the only way to adjust this. If you are looking at an ISIS/Octalink crank that is meant for singlespeed use, the chainline should be pretty close to 42mm (for road cranks anyway, i'm not sure about mtb cranks) and you probably won't have the same issues as with using a multi-ring crankset.
    I'd rather have a bottle in front of me than a frontal lobotomy.

    Sintesi Conversion Serotta Track

  12. #12
    Geek Extraordinaire sivat's Avatar
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    Quote Originally Posted by isotopesope
    www.chucksbikes.com has 6500 ultegra cranks in 170mm for 70 bucks, chainrings included.
    Since those are octalink, you'll be stuck with the chainline. It would be 41mm in the inside, 46mm on the outside. If you have the clearance on the chainstay (And given the small ring you are running, you should) using the inside position would work pretty well. 1mm off is not at all bad.
    I'd rather have a bottle in front of me than a frontal lobotomy.

    Sintesi Conversion Serotta Track

  13. #13
    shoot up or shut up. isotopesope's Avatar
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    my friend is running those cranks on his steamroller, with the chainring on the inside. his chainline is fine. i'm not sure his bb length... probably the length for a road double.

  14. #14
    LF for the accentdeprived
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    Quote Originally Posted by isotopesope
    www.chucksbikes.com has 6500 ultegra cranks in 170mm for 70 bucks, chainrings included.
    Sh!tfück, that's what a Tiagra costs over here in a brick and mortar shop!!! (Or a Sora if you're unlucky)
    Quote Originally Posted by dutret
    Do you deny that you are clueless or do you just think that "moron" didn't need to be tacked on there?
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