|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
threaded headset 'stack height' calculation
I need to buy a new 1" threaded headset for my winter bike but I am
being confronted with 'stack height' while trying to buy one... What is it? I have measured up the bike and I'm hoping someone can give me some free advice: 1) From the top of the forks shoulder, where the bottom of the existing headset bearing housing rests, to the bottom of the headtube = 12.8mm 2) From the top of the headtube to the top of the forks thread, with the existing headset locking ring removed, = 22.5mm 3) Therefore, is the stack height 12.8 + 22.5 = 35.3 ????? Many thanks in advance for all your speedy replies - this is an emergency as I haven't got my summer bike together yet either. |
Ads |
#3
|
|||
|
|||
threaded headset 'stack height' calculation
Many Thanks Andrew - any idea of the parameters involved..? If the
frame stack height is, say 35.3mm, a 34mm stack height headset is OK or too small or a 36mm stack height headset is OK or too big? |
#4
|
|||
|
|||
threaded headset 'stack height' calculation
wrote:
Many Thanks Andrew - any idea of the parameters involved..? If the frame stack height is, say 35.3mm, a 34mm stack height headset is OK or too small or a 36mm stack height headset is OK or too big? You have a 2mm spacer which could be removed from a '36mm' headset and certainly additional spacers may be added as needed. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 ** Posted from http://www.teranews.com ** |
#5
|
|||
|
|||
threaded headset 'stack height' calculation
wrote:
Many Thanks Andrew - any idea of the parameters involved..? If the frame stack height is, say 35.3mm, a 34mm stack height headset is OK or too small or a 36mm stack height headset is OK or too big? p.s. We cut threaded forks to 42mm, enough for a Super Record 4041, the tallest common format. I recommend that length with spacers as needed for a 'default' or standard length (for your future reference). -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 ** Posted from http://www.teranews.com ** |
#6
|
|||
|
|||
threaded headset 'stack height' calculation
ah, thanks raul..
recycling the old washer... heh.. great info |
#7
|
|||
|
|||
threaded headset 'stack height' calculation
Yep, thanks Andrew
|
#8
|
|||
|
|||
threaded headset 'stack height' calculation
On Sun, 11 May 2008 14:15:08 -0700 (PDT), "
may have said: Many Thanks Andrew - any idea of the parameters involved..? If the frame stack height is, say 35.3mm, a 34mm stack height headset is OK or too small or a 36mm stack height headset is OK or too big? In my experience, if the steerer projection is at or up to 2mm under the stack height, the headset will fit as-is. If the steerer projection is greater than the stack height, you may be able to take up the space by recycling washers or spacers that are present in the old headset, or the steerer can be shortened if absolutely necessary. I have not had to do more than just fiddle with washers to get a 1" threaded headset to fit in place of an existing threaded headset (when not changing to a different fork) in any of the headsets that I've replaced in the past two years. Admittedly, that's not a lot of units, but threaded headsets seem much less variable than threadless, and most of those that don't fit without modification seem to have a slightly lower height, which is where adding a washer from the old one becomes a useful tactic. Your mileage may vary, but the chances are good that you will have no problem or can cope with the one that you encounter. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
#9
|
|||
|
|||
threaded headset 'stack height' calculation
On May 11, 3:35 pm, Werehatrack wrote:
On Sun, 11 May 2008 14:15:08 -0700 (PDT), " may have said: Many Thanks Andrew - any idea of the parameters involved..? If the frame stack height is, say 35.3mm, a 34mm stack height headset is OK or too small or a 36mm stack height headset is OK or too big? In my experience, if the steerer projection is at or up to 2mm under the stack height, the headset will fit as-is. If the steerer projection is greater than the stack height, you may be able to take up the space by recycling washers or spacers that are present in the old headset, or the steerer can be shortened if absolutely necessary. I have not had to do more than just fiddle with washers to get a 1" threaded headset to fit in place of an existing threaded headset (when not changing to a different fork) in any of the headsets that I've replaced in the past two years. Admittedly, that's not a lot of units, but threaded headsets seem much less variable than threadless, and most of those that don't fit without modification seem to have a slightly lower height, which is where adding a washer from the old one becomes a useful tactic. Your mileage may vary, but the chances are good that you will have no problem or can cope with the one that you encounter. This is something that I guess I need to do, too. I noticed the Tange headset was loose on my Myata 914. The locknut is a cap type nut,and although a spacer was present, the cap / locknut wouldn't go down far enough to hold the cone. Then I was looking at some pictures of a similar bike, and noticed a bracket (absent from my bike) for mounting a front reflector. which was effectively another spacer. |
#10
|
|||
|
|||
threaded headset 'stack height' calculation
On May 11, 3:42 pm, "
wrote: I need to buy a new 1" threaded headset for my winter bike but I am being confronted with 'stack height' while trying to buy one... What is it? I have measured up the bike and I'm hoping someone can give me some free advice: 1) From the top of the forks shoulder, where the bottom of the existing headset bearing housing rests, to the bottom of the headtube = 12.8mm 2) From the top of the headtube to the top of the forks thread, with the existing headset locking ring removed, = 22.5mm 3) Therefore, is the stack height 12.8 + 22.5 = 35.3 ????? Many thanks in advance for all your speedy replies - this is an emergency as I haven't got my summer bike together yet either. if you happened to need spacers, these guys have some carbon spacer at really low prices http://www.bikingthings.com/2fihesp11cas.html |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Stack Height | DB4 | Techniques | 2 | October 31st 06 07:33 PM |
headset facing to reduce stack height? | dookie | Techniques | 19 | September 22nd 06 01:22 AM |
Where can I get a high stack height integrated headset?? | ches | Marketplace | 0 | July 17th 06 11:58 PM |
SPD-SL versus SPD stack height? | hippy | Techniques | 6 | October 27th 04 10:56 AM |
threadless headset w/ short stack height | Andy Wing | Techniques | 1 | December 31st 03 04:39 PM |