3 months ago
PROS: Attractive Design, Easy To Install, Lightweight
PROS: Attractive Design, Easy To Install, Lightweight, Durable
CONS: No instructions
BEST USES: Mountain Biking, Upgrade
Another great bonus, is that the thread for the cap seems to be identical to a standard star nut. I preferred the top cap that came with my bike, so I just screwed that into the head doctor.
1. I measured the inside diameter of my steerer tube (1 1/8") it and is right around 1" and this fit well. If the inside diameter was a little tighter you should still be able to squeeze it in. So if you have a alloy tube with thicker walls you might have a harder time fitting it.
2. Follow the instructional video. You need to loosen the expanding bolt slightly before inserting it. Or you might run into fit problems like other people had. You should not need a mallet to insert it.
The Head Doctor is easy to install and easy to remove.
I like it so much I purchased a second one so I can have one installed in my backup fork and ready to go.
Two tips for the Head Doctor - grease the internal threads when you get it (not the external surfaces of the unit itself) and you don't need a whole lot of torque on the top cap when installing it.
7 months ago
Not really any better than a star fangled nut, but it's pretty and still effective.
over 2 years ago
PROS: great concept, Looks great, Easy to use
CONS: Seems To Have Fit Issues, Had To Machine Down
8 months ago
If the unit I got was in fact a return or defective, I would not be as pleased with the Jenson service or Hope (if defective). I cannot prove it either way, so I will not knock either company.
PROS: looks cool, I like the name
CONS: Weak, Would not work
BEST USES: Toss in recycle bin, Paper weight
PROS: Nicely Machined
CONS: Limited Compatibility, Difficult To Install
PROS: Light, Easy install and removal, Keeps headset very secure
CONS: Weak top bolt
Q & A
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