Frame spacing? Are all the same now?- Mtbr.com
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  1. #1
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    Frame spacing? Are all the same now?

    This may seem like a stupid question to some, but in light of my recent issue with discovering my old bike I was restoring had a narrower spacing than modern bikes, this came up. I noticed that when you see frames on websites or even ebay they never seem to list rear spacing. Everything else is listed usually, but not always. I also noticed a lot of "single speed hubs" so not list their width either. For example, I was looking at some White Industries stuff last night and it says that it puts the cogs in the right place for current single speeds, but I don't know what the right space is. Are these 135mm hubs with the screw on part scooted over? I guess I am just a moron.

    I have been looking at these Fetish frames on ebay, a single speed model for $149. Has horizontal drops and what not. Also has disk mounts, but they aren't slotted so I don't know how well that might work. I know I could buy the frame then measure myself, btu what if say I was buying a Zion frame from jensen with a bunch of other components?

    I guess the assume if you have to ask this type of question then you probably wouldn't be buying the frame.

  2. #2
    Whatever! Just crash it!
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    The standard for hartail frames these days is 135mm. Some big hit and DH bikes are going to 145 or 160mm for strength. I believe road bikes have settled out at 130mm.

    Hopefully that helps a little.

    Peter
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  3. #3
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    Shamelessly lifted from the inexhaustible font of knowledge that is SheldonBrown.com

    91 mm Low-end front hubs.
    96 mm Older front hubs, especially French.
    100 mm Modern front hubs.
    110 mm Rear track and other single-speed hubs.
    120 mm Rear 5-speed, Ultra 6, newer track hubs.
    126 mm Rear 6- and 7-speed (road).
    130 mm Rear 7-speed (MTB) and 8- 9- and 10-speed (road).
    135 mm Rear 7- 8- and 9-speed (MTB)
    140 mm Rear tandem.
    145 mm Rear tandem (newer models.)
    160 mm Rear tandem (new Santana proposed standard.)

    I should add that almost all singlespeed hubs designed for mountain biking are 135mm spacing.

    Sam

  4. #4
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    I have seen that list, although it is not entirely accurate and doesn't really answer my question. My Peugeot MTB was a 7 speed and has 126mm rear spacing which I spread to fit a 135mm hub into.

    So, would you assume that most if not all MTB frames, single speed or otherwise, are going to be 135mm? Like that one on ebay, I should assume 135? Are there any notable exceptions? Why don't they list this sort of spec?

  5. #5
    kung food
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    Quote Originally Posted by 24601
    I have seen that list, although it is not entirely accurate and doesn't really answer my question. My Peugeot MTB was a 7 speed and has 126mm rear spacing which I spread to fit a 135mm hub into.

    So, would you assume that most if not all MTB frames, single speed or otherwise, are going to be 135mm? Like that one on ebay, I should assume 135? Are there any notable exceptions? Why don't they list this sort of spec?
    They don't list the spacing because for 99.5% of the time, a mtb frame will be 135mm. The remaining half % will say so. The only notable exceptions I can think of off-hand is the Redline Monocog, it's 110...you can also find some other large 26" bmx-style cruiser/jump frames with 110mm if you look hard., but it's very unlikely.

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