User Tag List

Results 1 to 17 of 17

Thread: Effect of 2 mm difference in lower headset cup height

  1. #1
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Effect of 2 mm difference in lower headset cup height

    Thanks to the thread by a fellow forumite on the Moots tapered fork, i am seriously considering getting one, as it would allow for greater tire clearance.

    One issue is that the website recommends usage of CK inset 8, which has a 14 mm lower cup height. However, the lower cup height on the HS of a frameset i recently bought is 12 mm.

    What sort of handling and fit issues might this produce? Or is it quite minimal, all things considered, given itís 2 mm?

  2. #2
    Join Date
    May 2008
    Location
    Better to be ruined than to be silent atmo.
    Posts
    20,201
    Post Thanks / Like
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    No effect at all.

  3. #3
    Join Date
    Oct 2012
    Posts
    8,483
    Post Thanks / Like
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    The effect depends on your capacity to overthink this. Given you are seriously asking that question I can't agree with Richard, it will have a devastating effect on the handling of your bike and you should seriously consider ordering a brand new bike.
    Last edited by sk_tle; 4 Weeks Ago at 09:35 AM.
    --
    T h o m a s

  4. #4
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by e-RICHIE View Post
    No effect at all.
    Thank you. Still makes me wonder why Moots specifies it that way. I think i’ve seen Moots with Cane Creek HS, etc

    Quote Originally Posted by sk_tle View Post
    The effect depends on your capacity to overthink this. Given you are seriously asking that question I can't agree with Richard, it will have a devastating effect on the handling of your bike and you should seriously consider ordering a brand new bike.
    Well, it is for a new frame, at least to me

  5. #5
    Join Date
    Apr 2011
    Location
    New York City
    Posts
    17,692
    Post Thanks / Like
    Mentioned
    17 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Could be just the shape of the lower part of the headset. May not be about any height difference. But Iíd call Moots and ask. They might say something like the line from the head tube to the fork is smoother or something. Not putting you off from asking here, but Moots is a good company, usually very helpful.
    Last edited by j44ke; 4 Weeks Ago at 09:51 AM.

  6. #6
    Join Date
    Jun 2008
    Location
    South of No North
    Posts
    3,697
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Tire pressure differences can result in 2mm or more difference in height. You’ll never notice the difference.

  7. #7
    Join Date
    May 2008
    Location
    Better to be ruined than to be silent atmo.
    Posts
    20,201
    Post Thanks / Like
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by sk_tle View Post
    The effect depends on your capacity to overthink this. Given you are seriously asking that question I can't agree with Richard, it will have a devastating effect on the handling of your bike and you should seriously consider ordering a brand new bike.
    That's levity, right?

  8. #8
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by j44ke View Post
    Could be just the shape of the lower part of the headset. May not be about any height difference. But I’d call Moots and ask. They might say something like the line from the head tube to the fork is smoother or something. Not putting you off from asking here, but Moots is a good company, usually very helpful.
    Good point, I'll ask them and report back.

    I just hope that it doesn't take umbrage at the fact that I'm intending to use it on a non-Moots frame. I mean, they've designed it so well, that others want it (for the better tire clearance)

    Quote Originally Posted by e-RICHIE View Post
    That's levity, right?
    That's how I read the post. As in, difference too small to matter

  9. #9
    Join Date
    Oct 2012
    Posts
    8,483
    Post Thanks / Like
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    You nailed it, as someone said, the difference is less than when one of your front tire is running a bit low on pressure fron a slow leak.
    Last edited by sk_tle; 4 Weeks Ago at 03:46 PM.
    --
    T h o m a s

  10. #10
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Also, bit of a thread drift, anyone has specs on the forks that No. 22 uses on its rim-brake bikes (in particular, Great Divide)? Correct to assume it's similar to Moots' tapered offering (as in, 1 1/4 to 1 1/8 tapered)? That may also be another option, but there's not a lot of info on the particular fork.

  11. #11
    Join Date
    May 2010
    Location
    Chicago
    Posts
    2,309
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    I've contacted No. 22 before and they got back to me pretty quick. If you email them I bet you can get all the details you need.

  12. #12
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by j44ke View Post
    Could be just the shape of the lower part of the headset. May not be about any height difference. But I’d call Moots and ask. They might say something like the line from the head tube to the fork is smoother or something. Not putting you off from asking here, but Moots is a good company, usually very helpful.
    Called them earlier. Moots said a Cane Creek headset would work as well.
    Quote Originally Posted by rec head View Post
    I've contacted No. 22 before and they got back to me pretty quick. If you email them I bet you can get all the details you need.
    Thanks for the suggestion. I contacted them and am waiting to hear back

  13. #13
    Join Date
    Jul 2008
    Location
    Khen-Tuck-ee, USA
    Posts
    1,859
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    [levity-on] Go up one size on the front tyre. [levity-off]

    Note the html tags for levity & irony are non-functional.

  14. #14
    Join Date
    Nov 2014
    Location
    St Petersburg
    Posts
    64
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by echappist View Post
    Called them earlier. Moots said a Cane Creek headset would work as well.
    Did they say which Cane Creek headset would work? Iíve got the CK I8 but Iíve never liked the look of it and parts of it have some serious pitting.

  15. #15
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by bcroslin View Post
    Did they say which Cane Creek headset would work? I’ve got the CK I8 but I’ve never liked the look of it and parts of it have some serious pitting.
    I didn't ask, but I'm pretty sure it's EC44/33 | ZS44/28.6. 44 refers to the diameter of the headtube. 33 is steer diameter @ crown race (close to 25.4 * 1.25); 28.6 is steer diameter at the top (25.4 * 1.125).

    I think this is also how CK classifies the Inset 8, at least according to Starbikes

    Btw, surprised to hear negative review of it. I was actually thinking of getting CK to add a bit of colored accent to a silver metal bike. The pitting issue is not an endorsement at all.

    PS: can't find a EC44/33 on Cane Creek's website; could find only EC44/30. Give Cane Creek a call, they are pretty quick to pick up the phone and are quite knowledgeable.

    PPS: seems like you can use a combination of these two: 110 upper assembly (for 1 1/8) and 110 lower assembly (for 1 1/4)

  16. #16
    Join Date
    Nov 2015
    Location
    Madison, WI
    Posts
    104
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    PPS: There isn't a complete headset that has the correct upper and lower assemblies, but the upper and lower assemblies can be purchased separately (same price as complete headset)

    Upper assembly is BAA0151K or BAA0152K (both ZS44/28.6, former with 8 mm stack; latter with 15 mm stack);
    Lower assembly is BAA0159K (EC44/33, with 12 mm stack)

    More info from Cane Creek, here. Also, give them a call, very little wait time, and very helpful reps.

  17. #17
    Join Date
    Nov 2014
    Location
    St Petersburg
    Posts
    64
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Effect of 2 mm difference in lower headset cup height

    Quote Originally Posted by echappist View Post
    I didn't ask, but I'm pretty sure it's EC44/33 | ZS44/28.6. 44 refers to the diameter of the headtube. 33 is steer diameter @ crown race (close to 25.4 * 1.25); 28.6 is steer diameter at the top (25.4 * 1.125).

    I think this is also how CK classifies the Inset 8, at least according to Starbikes

    Btw, surprised to hear negative review of it. I was actually thinking of getting CK to add a bit of colored accent to a silver metal bike. The pitting issue is not an endorsement at all.

    PS: can't find a EC44/33 on Cane Creek's website; could find only EC44/30. Give Cane Creek a call, they are pretty quick to pick up the phone and are quite knowledgeable.

    PPS: seems like you can use a combination of these two: 110 upper assembly (for 1 1/8) and 110 lower assembly (for 1 1/4)
    Thanks for the explanation. I wouldn’t get too worried about the pitting. I live and ride on FL’s west coast where our normal humidity is above 70% and temps are always hovering just under 90 f. I used to sweat like a pig and wasn’t the best about keeping my gear clean so the pitting is almost to be expected. I had to replace all of my screws and bolts with Ti hardware because of rust. CK makes great products but I’ve never been a fan of the look of the headsets. I wish Moots would do a tapered head tube so the headset could be cleanly tucked away like No 22 and Firefly do.

Similar Threads

  1. Gap between lower headset and fork
    By arik in forum VSalon Pro-Bicycle Tech
    Replies: 10
    Last Post: 05-01-2017, 04:22 AM
  2. BB height and it's effect on stability
    By bdaghisallo in forum General Discussion
    Replies: 42
    Last Post: 07-27-2015, 07:47 AM
  3. Lowest stack height headset known to man?
    By Dorman in forum General Discussion
    Replies: 37
    Last Post: 09-03-2011, 03:47 PM
  4. New Stem, lower stack height - headset adjustment question
    By Mike Marley in forum VSalon Pro-Bicycle Tech
    Replies: 5
    Last Post: 08-09-2011, 09:17 AM
  5. Headset lower stack height
    By Saab2000 in forum General Discussion
    Replies: 31
    Last Post: 09-21-2009, 06:06 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •