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cutting carbon steerers ... 3mm above stem?(3 posts)

cutting carbon steerers ... 3mm above stem?sherpa
May 2, 2001 8:58 AM
I just read an article in VeloNews regarding headset set-up for carbon forks that have carbons steerers ... the article (vol.30) followed parts guru Fulvio Acquati and chronicled the day in the life of the master as he visited the top Euro-Pro at an earlier season race ...

At the very end of the article Fulvio meets with the Fassa Bortolo team and sees that Giancarlo Bianchi has adopted the method of placing a 3mm spacer at the top of the headset, above the stem ... earlier he claimed is was ugly and a mistake, but his mind changed once he heard Bianchi's explanation ...

Bianchi claims that "carbon steerers need to stick up above the stem or [else] the upper bolt will pinch the top [of the headset cap?] inward ..." The picture in VN showed Casagrande's Pinarello with that exact set up ...

Has anyone heard of this before?

Your thoughts would be greatly appreciated ...

Vermont Sherpa
re: cutting carbon steerers ... 3mm above stem?grz mnky
May 2, 2001 3:47 PM
I've been running a single small 3mm spacer above the threadless stem 'cause I didn't like the way the special Reynolds cap fit against the stem. Fact of the matter is you can do it either way - no one has passed any laws yet. It's most important to make sure that the top of the steerer doesn't bottom out against the cap when everything compresses. You'll be left with a loose headset that you can't quite get the play out of. Pinching could be a factor, but it really comes down to the design of the stem.
re: cutting carbon steerers ... 3mm above stem?mon t
May 4, 2001 6:55 AM
i have ridden my look hsc with the fork well down inside the stem for a few years and there is no sign of a problem. this seems to be a solution to a problem which never existed. i tighten the lower bolt a tighter than the upper, though, just to be sure....cf tubing is strong stuff, bro. i remember when the spec. allez epics came out they sent around a little piece of the tubing for shops to play with. we used to bang that ring of cf tubing with a hammer on a concrete floor. it never did break....