Originally Posted by
Looigi
A bit OT, but I like the idea of an epoxied in aluminum insert. I've searched a bit and not have found them to be generally available in a range of appropriate diameters and lengths. Is there a source?
An aluminum insert won't have the effect of reinforcing the carbon tube because it's strength and flex modulous are too mismatched for it to work in concert with the carbon steerer.
I'll try to explain by analogy. Imagine you're trying to lift a 200# man out of a hole. You have plenty of rope, and bungee material, but it's all rated to only 125#s. You can use 2 ropes, or two lengths of the bungee and get the man out. But if you use one rope and one bungee, the rope will reach it's limit and break long before the bungee has even begun to stretch, and once the rope breaks the bungee soon follows.
A steel insert of the right strength can work, not to prevent breakage of the steerer, but as a "safety net" to hold things together long enough for the rider to stop safely.
However, as far as the OP goes, he's best off living with it as is unless he's a strong sprinter or climber who really puts some stress into his handlebars.