Replacing sheave on jib traveling car

Hello, I’m new to the site. Both of the sheaves on my recently purchased hobie are brittle. I know new ones can be ordered, but can someone explain how to replace them? I know the old ones must be drilled out, but do you rivet new one in?
Thanks for any help

I used a pin and ringding, works fine.

Think you need to be more specific on which sheave you’re referring to. Can you post a pic?

sm

He already described which one in the post title, Jib traveler car.

I was thinking of using the same type of bolts used to replace the rivet on the rudder cams. I have heard them called sax bolts,and barrel bolts.

Check here
https://www.mcmaster.com/sex-bolts

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84 14T Redline #67 Blue Hawaii faded but still working!
82 Yellow hull16 '81 Boomer nationals 20.9 on GPS
83 White hull 16 No sails "Clean and Purty Now!"
87 White hull no sails no tramp

Whichever method you use, the fastener cannot draw tight, otherwise it will pinch the sheave and not allow it to rotate. A lock nut or loctite could work.

Lots of different iterations of the “jib traveler car” have been produced for the Hobie 16 between 1970 and 2019, which is why a pic would be helpful to understand exactly which system he has and which specific sheave needs replacing.

sm

Thanks for your help. I contacted West Coast Sailing . They are sending replacement rivets.