Hey Ya'll,

Does anyone know the ID of the aluminum frame Denali headset tube? I'm trying to not have a week long disassembly, measure to order a new headset, then receive it. (Hint- the OD of the tube is 37mm.)

I live in Florida and I'm still riding 20 miles five days a week at dawn. (Love that girl.)

If no one knows I'll tear the bike down this next week end and measure. But it will all your fault that I lose a week of riding and gain 5 lbs.

Any recommendations for a 1" pretty good threaded headset?

Thanks

I may be mistaken, but I think headset dimensions are pretty standard.

https://www.sheldonbrown.com/cribsheet-headsets.html

A 1" threaded headset should have either a 30.0mm or a 30.2mm ID headtube...and something as new/recent as a Denali alloy frame will likely have the ISO standard 30.2mm. In my experience, most 1" headsets you find will have cups to fit 30.2mm headtubes. If it turns out that your Denali actually has the ever so slightly smaller 30.0mm inside dimension, then you could lightly sand/file the inside diameter so the 30.2mm cups will fit correctly.

Call the manufacturer.

I doubt that the headset manufacturer (or the bike's for that mater) wants to deal with the user that's a few levels of distribution removed from them.


One could always remove the headset, measure and reinstall it to keep riding. Andy

If it was made by Kent they post a phone number as well as offer a plethora of other contact methods.

Not trying because you think they don't want to be bothered seems silly. It only takes a small amount of time to find out if they do or don't.

philidelphia or new england........... we'll know soon.

Ah yes, Iride01, you are correct. Denali's dealers are not about service so going through them is not likely to get much dimensional info, big box stores are about moving product more then informing the rider IMO. I still wonder though if their 1800 center will know that spec, or be able to find it. Andy

Headsets just don't do that much work. What's so bad about your current one that you need to replace it? Even one bike I had that visually showed brineling on the headset race didn't exhibit any noticeable steering issues when ridden.

Considering the cost of headsets, I'd rather spend that money on other stuff for the bike. Unless of course the issue with the headset is really causing noticeable issues you can't live with.

Personally I'd switch to threadless if I had to replace mine.

Just took a look - for the first time - at the headset on a bike with 14,000 miles since 2008. Still working well. Ritchey Logic races and bearings looked ok. Cleaned, lubed and put it back together. I will replace the ball bearings at some point in the not too distant future.

Hey All,,, thanks for all the good input and advise. I was just hoping that someone had already replaced a headset on a Denali.

Update,,, this weekend I'll disassemble and measure. I have a good idea that it will be ISO 30.2mm. Reason is that my stem quill is 22.2mm and a JIS quill is 22.0mm which indicates mine is ISO. Also, as one poster suggested "just sand out the 0.2mm".

Whatever, I'm good and thanks again.

Umm, one or two corrections:

JIS and ISO standard quills are both 22.2mm/ 7/8" to fit 25.4mm/ 1" threaded steerers.
French standard quills are 22.0mm, to fit 25.0mm threaded steerers.

If you have pressed-in headset cups, know that JIS headset dimensions are slightly different from the "Professional" standard (which is often mistakenly called ISO.)
"Professional" std. headsets have a 30.2mm skirt OD and a 26.4mm crown race ID.
JIS std. headsets have a 30.0mm skirt OD and a 27.0mm crown race ID.

ISO specify ONLY a 30.0 cup skirt OD, a ISO 25.4mm x 24tpi thread, and a 22.2mm steerer ID. ISO does not have a headset standard beyond that; they do not specify a crown race ID. (But they are picky about the threading!)

Sheldon Brown's page is wrong about this, BTW. The "Professional" standard was "invented" by Campagnolo, but refers only to the headset cups and races. Threading can be Italian, French, British, or ISO. The threading don't really care how the cups fit the frame. However, some dimensional standards, like JIS, do care, and are more comprehensive than others, specifying the threading as part of the standard.

No matter your standard, your head tube ID will be about 0.1mm smaller than the skirt OD, and the crown race seat will be about 0.1mm bigger than the race ID.

You might be surprised at how many bike and component makers will actually pick up the phone and talk to you. I have had lots of successful interactions with various companies either by phone or email.
Going straight to the source is worth trying at least.
That said, in a case like the OP's, I would simply remove and measure, but I have the resources to do so.

[QUOTE=Dan Burkhart;20155373 That said, in a case like the OP's, I would simply remove and measure, but I have the resources to do so.[/QUOTE]

Dan,

Like you I also have the resources and ability to remove then measure. That is what I'll do this weekend. Thanks for the input.