is there such as thing as a tapered-to-straight adapter for MTB headset? I am trying to assemble a bike for someone in my family.  There are a few challenges. The first is my limited experience, the second is her wish-list, which includes using a 27.5&quot; MTB frameset she already has, a limited budget, and a preference to not use a MTB-style suspension fork but a lighter-weight rigid fork.
The headtube expects a  threadless tapered steerer, 1-1/2&quot; to 1-1/8&quot;.  With the limited budget, that leaves only a few choices: low-end all-carbon or an alloy steerer with carbon-blades.  I have seen many low-end carbon forks on eBay, Amazon, and Alibaba, but the reviews are sprinkled with comments like &quot;I had to take a dremel to the dropouts&quot;. So I would really prefer to get one with an alloy steerer from a &quot;brand name&quot; bike manufacturer. But they all seem to be straight 1-1/8&quot; steerers, not tapered.
Is there such a thing as an adapter for a headset, whose bottom bearing assembly is a 1-1/2&quot; to 1-1/8&quot; adapter, something along the lines of this mockup:
Yes, many headsets made for it come with a crown race reducer. Cane Creek, FSA, Nukeproof and several other big names make them so that you can convert a tapered frame to accept a standard straight 1-1/8&quot; fork. Just be sure to take note of what type of bearing/headset your frame uses whether it be external, zero stack or integrated.
You can also likely buy the crown race reducer separately to be used with your choice of headset. A google search for &quot;reducer crown race&quot; will net you the results you are looking for.