TCR

Needs to be 1 1/8" and probably alloy steerer at that length.

Dubbayoo

Alpha Q Z-Pro

TCR

Thanks!

Ouch, a little pricey at $320.95.

damocles1

So you want the best fork that a chiselbag can afford? WTF does the length of the steerer have to do with quality?

biker7

I guess I am curious why you would ever need a steerer longer then 300mm? Even with a head tube length of 230mm you can build with a stack height of 35mm with a typical stem clamp length of 35mm.
Haven't seen too many head tubes as long as 230mm.
If you are thinking about a lot of spacer stacking under the stem, keep in mind with a carbon steerer in particular, 40mm is about maximum for structural integrity.
You must be a giant.
George

NRRider

I believe the Ouzo Pro all carbon can also be had with a longer steerer. Tough to find, but they are out there.

TCR

I'm 6'4" with a bad back so I want to experiment with a higher bar. The description of the fork reads, "With a reinforced 450mm steerer tube and unlimited spacer stack-height, we've got you covered no matter what your set up requires." I've heard of the limited stack height with carbon steerers also so I'm assuming this fork has an alloy steerer or something to that affect.

oilman_15106

Why don't you look into attacking the problem with an uncut 300mm fork and a Mt. bike style stem with a lot of rise? Just a thought. May have to go to standard size bar.

VT to CA

Do a high angled stem and a 300 or you're going into end up with something that steers like the Wonka-mobile bubble car.

botto 

This guy must know:

biker7

I believe running a higher rise stem...+17 degrees with a bit less stack height is a more elegant solution and more structural will less cantilever steerer tube outside the head tube. OP...I am sure you have considered this. At 6'4" you maybe able to get your bars up around the seat with a more liveable stack height with a +17 degree stem...versus simply piling on the spacers. I am an older rider as well with long legs so I have this fitting dillemma as well and opt for a full 40mm of spacers with a carbon fiber fork. It would probably be ill advised to go more but it looks as though you have identified a fork that can handle this. If you haven't maxed out on spacer stacking and stem rise with your current set up, consider this.
One of the reasons I like to buy a new frame and fork when building a bike, is most cut the steerer down more then I prefer.
Good luck,
George

biker7

Complete B.S.

TCR

Current bike is already set up with an uncut 300mm fork, spacers, and a +17 stem. This puts bar height slightly below seat height.