Bicycle Mechanics - New stem for Trek 1000 advice
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07-03-11, 10:01 PM
I am currently trying to figure out what information I need in order to change the stem on my 2000 model Trek 1000 to a shorter one. I researched and found the specs for that model but I want to make sure I order the right part so need a little verification please. On the specs it says
Handlebar Stem: Alloy
Headset: 1" sealed mechanism
Not sure if that helps but here is the url to a picture and full specs if that will give you a better idea.
07-03-11, 10:23 PM
You want a stem with a 22.2mm quill (that's the part of the stem that slides down into the fork), which may also be nominally identified in other terms, such as "1-inch threaded." Anyway, you'll want to verify whether the handlebar is a 25.4mm or a 26.0mm diameter, and pick a stem that fits your bar (or get a new bar that fits the new stem). Profile Designs makes some quill stems in this size, here's some: http://aebike.com/parts-accessories-catalog-qc30/?action=list&category=149&type=T&searchtype=attributesearch&searchDropDown65=&search2=&searchDropDown445=&searchDropDown60=&searchDropDown461=&searchDropDown73=1%22+Threaded&search67=&searchDropDown68=&searchFrom10=&searchTo10=&gobutnsearch=Search
07-04-11, 01:24 PM
Ok thanks for the help. As for the handlebar diameter. I don't have a caliper so I tryed the old string way and wrapped it around the part of the bar where the clamp goes and got 3.5 inches. I then took that and converted it to mm and got 88.9. Divided that by 3.14159 to get diameter but it is coming out to 28.29?!? Math has never been my strong point but I would like to think that if I made it through college algebra that I could simply find the diameter of a simple handlebar. Perhaps I'm wrong though. Any thoughts or corrections anyone?
07-04-11, 02:36 PM
Since that method isn't giving a sane result, and since it *is* important for these parts to be happy with eachother, you need to get an accurate measurement. Start by just unclamping the bar in the stem, sliding it sideways enough to see the part that was being covered by the clamp, and see if it happens to be marked with either 25.4mm or 26.0mm.
07-04-11, 02:56 PM
a 22,2 to 28,6 [7/8">9/8"] quill to threadless adapter will let you use threadless stems,
their open face handlebar mounting makes trying different angles and extensions easy.
won't have to re tape the bars again to make those changes..
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