I'm sorry, [MENTION=372955]Scooby Snax[/MENTION] was correct, it is an aluminum steerer tube. Apologies for giving misinformation.

Next question, it would go on this bike


Does anyone think the Nasbar fork will affect the bike's handling in a negative and noticeable way? I assume the dropout-to-crown distance is longer on the Nasbar fork (since it is described as a "cyclocross" fork), which will raise the head tube a little and slacken the head tube angle a little.

I am on the fence about this. It seems the easiest and cheapest way to try out a disc front brake. This is my foul weather road bike, it has been fitted with Crud Roadracer fenders and clipless pedals since the photo was taken. But it won't be all that "easy" since at a minimum I'll have to have to source a tubular rim matching the rear (old Campagnolo rims), build a new front wheel, replace the headset and stem. Nor will it be that "cheap" since after pricing the parts, I'm concluding the cost will be $580 I'm adding up prices for fork, rim (used), spokes/nipples, disc hub, rotor, brake, mount adapter, headset, stem - using generally cheaper brands. And the bike will likely be a little heavier. Ugh, I'm slipping off the fence.