single speed bike converts to multi speed?

Discussion in 'Motorized Bicycle General Discussion' started by dumpstercrusher, Jul 7, 2013.

  1. dumpstercrusher

    dumpstercrusher New Member

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    I havent been to walmart yet so i wanted to ask you guys here but does the single speed bikes have the bolt setup in the rear to change over to a multi gear? i want to swap all my gearing over to the single speed bike because I just want the frame if its possible.
     
  2. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    No, I don't believe so.

    There is no reason for manufacturers to make all bicycle frames versatile. When a customer decides he wants a multi-speed bicycle, he simply buys one.

    However, a few cruiser-frame type bicycles were built with 7-speeds. If you find one, you can transfer your gear onto it.
     
  3. maniac57

    maniac57 Old, Fat, and still faster than you

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    If you use the right kind of derailleur, you can easily mount gears on any bike. Use the one with the deraileur mount tab that slides in the axle slot. You might have to spread the rear tubes a bit for the wider axle, but it's easy with a small scissor jack or similar.
     
  4. JustAnotherBozoOnABike

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    ...what about an internally geared hub? ...will one of those fit in a cruiser frame?

    ...lol, i sure hope so 'cause i'd love to convert my cruiser to a 5 speed so i could add a SBP shift kit.

    ...here's an example of what i mean although this is an 8 speed.

    Sturmey Archer S80 8-Speed Hub 36h, Silver, with Disc Brake

    peace, bozo
     

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  5. dumpstercrusher

    dumpstercrusher New Member

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    so i can spread the rear axle to fit the multi gear without any problems with the frame cracking or breaking?

    looks like a good alternative if i cant find one that will accept a multi gear
     
  6. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    Just make sure you don't choose one with a coaster brake.

    With a shift kit, coaster brake doesn't work.
     
  7. JustAnotherBozoOnABike

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    ...yeah man, when i'm ready to make the conversion, assuming it's possible, i'd be opting for a disc brake hub, ...i just pulled the trigger on a disc brake setup from VMB for my front wheel, now all i gotta do is learn how to lace it up, lol.

    peace, bozo
     

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  8. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    Me too.

    My project cruiser frame was made for internal hub with v-brake.

    I've got the rear disc brake bracket for it, but it'd be more versatile and cheaper with an 11t/34t cassette.
     
  9. Huffydavidson

    Huffydavidson STREETRACER/MANUFACTURER

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    BOZO, the inner hub multi-speed hubs do not hold up with shift kits. Tried it 500 miles and it was done son.
     
  10. BarelyAWake

    BarelyAWake New Member

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  11. Huffydavidson

    Huffydavidson STREETRACER/MANUFACTURER

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    well I stand corrected or maybe it's because I don't run a stock motor .
     
  12. BarelyAWake

    BarelyAWake New Member

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    The above motor isn't stock, nor is it treated particularly gently. Insofar as I've seen the primary causes of jackshafted ISH failures are old hubs being "recycled" into a build, maladjustment of the shifter or the more common miss shift and/or "speed shifting" (not backing off the throttle before shifting).

    I've hauled cargo, raced others & even accidentally speed shifted... overall I'd have to report that the SA X-RD3 is the most reliable component on that build as it's the second motor it's had, it's on it's fourth freewheel bearing (pedal crank) and I couldn't even tell you how many times I've had to rebuild/repair the shift kit (2nd gen) lol

    I build my own jackshaft assemblies now https://www.youtube.com/watch?v=U10xLqTekOw - if it wasn't for the fact that's got an electric hub (hybrid) I'd have happily tried the Sturmey Archer XRK8 8spd disc internal hub, though reports have said the 3sp ones are the strongest *shrug*
     
  13. bigbutterbean

    bigbutterbean New Member

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    From what I have heard from others who have had internally geared hubs fail with a shifter, power shifting is the number one cause of failure. Cheap hubs are probably the number two cause. If you've got a quality hub and don't power shift, you should be fine.
     
  14. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    what brand and model of hub broke on you?
     
  15. The_Aleman

    The_Aleman New Member

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    I have over 6K miles on my X-RD3 and 300 miles on a new X-RD5. So far they have held up great for me.
     
  16. maniac57

    maniac57 Old, Fat, and still faster than you

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    Spreading the frame will not hurt it as long as you don't go crazy. Done it many times without problems.
     
  17. Nashville Kat

    Nashville Kat Active Member

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    I would stay with a five or six speed freewheel at most myself-

    but measure it all first-
    theres also a nice little 3 cog freewheel usually on ebay for abot $12 shipped-
    http://www.ebay.com/itm/Metal-3-Spe...heels_Cogs&hash=item5aefbc8890#ht_1886wt_1141

    it might be easiest to try to get a wheel with a freewheel hub already built up- maybe even find some biogus used mountain bike on craigs for less than buying a whole wheel-

    if you ran 700c or 27" on the back, it's usually A LOT easier to find a caliper brake for the bike- 700c gives you more tire options, but 27 tires are usually pretty cheap these days

    Are you tal;king about a Thruster single fixie? Then probably the freewheel would screw on but you may need to get a longer axle and some spacers and maybe even bend the frame just a bit- that's why the smaller the better- You may have to cut a longer axle back down

    but measure carefully- I wouldn't try to get more than an 1/8 " out of it- so measure first!
     
    #17 Nashville Kat, Jul 10, 2013
    Last edited: Jul 10, 2013
  18. The_Aleman

    The_Aleman New Member

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    The problem with freewheels is that they usually require more wheel dishing and they also usually require thinner chain run at angles for some gears.
    They almost always require 130-135MM hubspacing, while a typical coaster-brake cruiser is ~105-110.

    An IGH allows for a nice straight chain regardless of gear and they are available with the same hubspacing as coaster-brake hubs.
    One almost always ends up with a more stout wheel when not running external gears, from my experience.

    My Sturmeys are laced 4-cross with 12g stainless Sapims to Weinmann DH-39 wheels. The finest combination of wheel I have ever experienced so far!
     
  19. Jeckler

    Jeckler New Member

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    Shimano makes a derailleur adapter for frames without the mount built in.
     
  20. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    #20 5-7HEAVEN, Jul 20, 2013
    Last edited: Jul 20, 2013

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