You could look at stems with the wedge assembly as they just need to grip the steerer rather than clamp to it, and tend to do this lower than the top bolt of a more traditional stem.
A use stem with a Ringo star?
Pretty sure I had a title stem which only had a bolt at the bottom.
A quill type extender is perfectly safe provided the stem clamps mostly unto the actual steerer, if its just a bit extra for preload, a quill type will be fine.
I'd still dare provided the lower bolt is fully clamped unto original steerer but that's because I'm a cheapskate. Custom made sounds good thoughThe Title stems are too short & USE either too long or too deep. Heard of the Ring-o-Star device but not seen in action.
I've got an old Thomson Elite with the wedge assembly but bar clamp is 25.4mm. This bike is 31.8mm
Bit more than that - steerer is 11mm below top of stem & 2-3mm below top stem bolt.
I've ordered an extender from Blue Liquid Labs. They are custom made to the steerer ID & required length.
I've ordered an extender from Blue Liquid Labs. They are custom made to the steerer ID & required length.
Except it bolts to a star-nut with a hollow threaded bolt to which the stem bolts to for pre-tensioning. Required a thicker stem bolt than normal. BMX I think. Comes supplied.But I guess, technically, the custom made thingymajig is the same concept as one of them quill type extenders, just better machined to prevent play and slippage?
Last one was $60 posted 5 years ago. I'll let you know as I haven't asked!How much was it if you don't mind me asking?