I have a TIBAR bar. Is the spacer black? The diameter of the ti bar is smaller and the shim may just make up the difference. My spacer is aluminum. Other material bars have a bulge. The ti is harder to form. It's probably much cheaper to use a shim than to bulge the bar, if it's made from tubing. Ti is very costly so that making a bulge may make the bar to pricey.
Also aluminum tubing will not squash as easily under pressure. I can actually squash my ti seatube on two of my ti bikes by tightening the front derailleur clamp too much.
It also happened to a friend. I can actually slightly squeeze the top tube on one of my ti bikes by hand.
I had aluminum bar ends on that bar for a couple of years with no problems. That leads me to believe it's just a shim to make it the right size. I have had ti bar ends on there for the last couple of years. No problems.
Last edited by 2manybikes; 12-27-04 at 10:34 PM.