NCAA - DUAL CHAMPIONS!
Join Date: Mar 2000
Location: From Sarasota, FL sitting in front of a computer spewing random thoughts!
Bikes: Intense Uzzi SL, Masi Speciale, Trek 3700 Nashbar Single Speed, Old Cilo Road frame
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O.k., here's a lesson on bike terminology. I'll try to make this brainless easy!
Frame, you know what that is. Parts of the frame consist of the headtube, the top tube, bottom tube, seat tube, chainstay, seat stay, bottom bracket and dropouts.
The headtube is the almost verticle tube that the forks slide through. The top tube is the horiz tube that goes from the handlebars(headtube) to the seat. the downtube goes from the headtube to the bottom bracket (where the cranks go through). The seatube is where DUH, the seat goes in. The chainstay is the smaller tube going from the bottom bracket to the dropout (that holds the rear wheel) the seat stay goes from the seatube to the dropout.
The headset consists of two bearings, races, cups and caps and these are press fitted into the headtube. There is one bearing on the top and one on the bottom. The steerer tube comes up and rotates on these bearings.
The advantage of a threadless vs threaded is one availability, and two the threaded would CONSTANTLY come loose. Plus, the overall height of the headset (Stack height) can be reduced using a threadless headset (no top nut and lock nut). Plus, it's lighter weight. Also, with the focus on lighter weight, many fork manufacturers started making their steerer tubes out of aluminum. Well when you thread aluminum, it doesn't last. Plus, if you insert a quill stem (wedge bolt thingy) it could destroy an aluminum steerer by the force exerted by the quill (metal wedge).
A threadless stem goes around the outside and compresses the aluminum steerer tube. Aluminum is strong in compression (squeezing) but weak in tension (pushing out from inside). So, that is why threadless became popular and is now the standard.
Whew, that's a lot of typing, even for me!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger