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  1. #1
    DOS
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    Steerer length rule of thumb?

    Is there one as compared to head tube length? My current steerer is 25cm in a 15cm Headtube (so 10cm longer than HT). I think I can make it work with a new frame I am considering with 17cm HT since I have more than 2cm of spacers in current set up. I infer I can just lose whatever spacers I dont need. Am I missing something?
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    you did not take into account the current stack height of your headset. if you swap headsets to the new frame then it should be fine, in your situation.

  3. #3
    coprolite fietsbob's Avatar
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    Threadless ?, dont cut it , buy more spacers , some above the stem are FINE.

    Find out what feels like the best fit for you. Ride the bike for a fwe months.

    rules of thumbs are not for people, even their thumbs are different size..

  4. #4
    Bianchi Goddess Bianchigirll's Avatar
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    the only rule I have about steerer tubes/headsets is, I never cut/trim it unless the 'extra' is more than an inch.
    Last edited by Bianchigirll; 11-13-10 at 12:18 PM.
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte SOLD, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

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  5. #5
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    Remember to take the headset height into consideration (if a new/different or integrated headset is being used). A 2cm change in height (by way of removing spacers) won't matter at all, but try to keep at least one spacer in place between the stem and headset.

    Edit: beaten to the punch, badly

  6. #6
    DOS
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    Quote Originally Posted by fietsbob View Post
    Threadless ?, dont cut it , buy more spacers , some above the stem are FINE.

    Find out what feels like the best fit for you. Ride the bike for a fwe months.

    rules of thumbs are not for people, even their thumbs are different size..
    Trying to determine whether my current steerer is too short for longer HT, so no plans to cut.
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  7. #7
    coprolite fietsbob's Avatar
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    basic math .. headset stack height + thickness of stem clamp + headtube height

  8. #8
    DOS
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    Quote Originally Posted by fietsbob View Post
    basic math .. headset stack height + thickness of stem clamp + headtube height
    Thats what I figured. Thanks
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  9. #9
    DOS
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    Related headset Question

    At this point I plan to reuse the headset from my other frame so stack height will be same. However, I am considering just getting a new headset because the seals on the old headset are looking pretty worn.

    Assuming I get one with similar stack height so steerer length isn't an issue, will I have an issue with crown race on my current fork? That is, will I have to swap out whats on there for the one than comes with the new headset (race is not pitted), particularly if I get cartridge bearing rather than the caged balls I have now? Or are crown races for 1 1/8 headset pretty much standard.
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  10. #10
    DOS
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    Quote Originally Posted by DOS View Post
    At this point I plan to reuse the headset from my other frame so stack height will be same. However, I am considering just getting a new headset because the seals on the old headset are looking pretty worn.

    Assuming I get one with similar stack height so steerer length isn't an issue, will I have an issue with crown race on my current fork? That is, will I have to swap out whats on there for the one than comes with the new headset (race is not pitted), particularly if I get cartridge bearing rather than the caged balls I have now? Or are crown races for 1 1/8 headset pretty much standard.
    Yet another question. Since I will be using a fork I already have , I had planned to use the calipers that I have. I just noticed that Soma says their frame was "designed with 57mm brakes in mind". Since most 57mm brakes have a range of 47-57mm, should I expect that my maximum 49mm caliper brakes will work on rear as long as I go with skinnier tires? Or am I looking at needing new longer reach brakes?
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  11. #11
    cab horn
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    1 1/8 crown racers are pretty much standard.

    Tyre size is irrelevant to brake reach. If soma says you need 57mm of brake reach, you will need 57mm of brake reach. Who cares what they say anyways. A 30 second installation test of the brakes will tell you definitively if your current brakes will not work.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  12. #12
    DOS
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    Quote Originally Posted by operator View Post
    1 Tyre size is irrelevant to brake reach. If soma says you need 57mm of brake reach, you will need 57mm of brake reach. Who cares what they say anyways. A 30 second installation test of the brakes will tell you definitively if your current brakes will not work.
    Kinda what I was thinking. Buy the frame, if my brakes work, great, if not, Tektro long reach brakes don't cost much.
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