I've used one it's good so far, here's the original write up.
http://www.retrobike.co.uk/forum/viewtopic.php?f=1&t=235105
http://www.retrobike.co.uk/forum/viewtopic.php?f=1&t=235105
Steerer extenders?
- Thread starter Senri
- Start date
@senri:
I had a BBB extender in a Fox fork once. The problem I found was that the steerer tube on the fox fork is tapered on the inside. (so on the top it has a larger inside diameter then on the bottom). The extender was designed for a straight inside steerer tube.
This meant I had to cut down the extender to get it in deep enough; also file of the bottom part of the extender so it would match better with the tapered inside; and finally I decided to add a long bolt and cap to secure the whole thing from the bottom.
I added that last step because it was an all mountain type of bike that I also used in bike parks, so didn't want to take any chances. It never failed on me, headset (cane creek) never came loose. I used it for about 3 years like that.
But now I got a different fork (with full steerer) for the All Mountain frame and the Fox fork has moved on to a frame where it just fits.
I had a BBB extender in a Fox fork once. The problem I found was that the steerer tube on the fox fork is tapered on the inside. (so on the top it has a larger inside diameter then on the bottom). The extender was designed for a straight inside steerer tube.
This meant I had to cut down the extender to get it in deep enough; also file of the bottom part of the extender so it would match better with the tapered inside; and finally I decided to add a long bolt and cap to secure the whole thing from the bottom.
I added that last step because it was an all mountain type of bike that I also used in bike parks, so didn't want to take any chances. It never failed on me, headset (cane creek) never came loose. I used it for about 3 years like that.
But now I got a different fork (with full steerer) for the All Mountain frame and the Fox fork has moved on to a frame where it just fits.
Hi Wytze,
That are some good tips! I didn't think that the steerer was tapered, but I didn't really check it either, so that will be the first thing I will do. I have used only a few rings on top, so I guess the big bolt will stick out the bottom, which is a good place to attach another bolt from the bottom. Was that that also how you secured it from below?
That are some good tips! I didn't think that the steerer was tapered, but I didn't really check it either, so that will be the first thing I will do. I have used only a few rings on top, so I guess the big bolt will stick out the bottom, which is a good place to attach another bolt from the bottom. Was that that also how you secured it from below?
Can't remember anymore. But I do remember that the aluminium 'nut' on the bottom of the extender wasn't good enough either; the thread comes out if you try to really tighten things up even though I greased it up properly. So I had replaced it with something else, probably something from a different stem.
