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-   -   Thule hitch adapter bolt (https://www.bikeforums.net/bicycle-mechanics/1295903-thule-hitch-adapter-bolt.html)

Freerojo 06-09-24 06:13 PM
Thule hitch adapter bolt
 
Anyone know off hand what the bolt size and type connects the 2” adapter to the 1.25” bike rack? It’s a flared bolt head. I don’t know the rack model as I got it used. Thank you

soyabean 06-09-24 06:48 PM
Should be standard 1/2-13 NPT.

maddog34 06-09-24 07:40 PM
Originally Posted by Freerojo (Post 23263915)
Anyone know off hand what the bolt size and type connects the 2” adapter to the 1.25” bike rack? It’s a flared bolt head. I don’t know the rack model as I got it used. Thank you
"Flared head" as in Conical hole, in the side of an adapter sleeve?? that's called a Countersunk allen (hex socket) head screw, meant to be flush mounted into the adapter's hole...

a trip to a hardware store tomorrow will be needed.... the thread size may be any number of sizes.
warning: 5/16"-18 threads and 8x1.25metric threads are VERY similar, but will NOT work well in either's holes. ;)

maddog34 06-09-24 07:50 PM
Originally Posted by soyabean (Post 23263937)
Should be standard 1/2-13 NPT.
a standard receiver hitch pin size is 5/8"... i just checked one.


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