Since a few of us here are working on Pacemaker restorations, myself included, I thought I'd point out some differences in rear racks that have recently come to light as addressed in this thread about Pacemaker chainrings. As you can see in the thread there are two distinct mounting types for racks, and it seems they aren't interchangeable. I'm reposting some pictures from the previous thread as examples.
In the first picture, the mounting tabs for the rack slope sharply upward to join with the seatpost binder bolt. Here is a closeup of the rack mount:
In this picture you can see how the mounting tabs attach, but look closely at the seatpost clamp; it's integral to the frame, and not a separate piece welded on. The bolt is also positioned higher on the tube than the other "standard" style seatpost clamp, as seen in the attached picture in this post: http://thecabe.com/vbulletin/showth...-Pacemaker-Chainring-help&p=206740#post206740
There's a third type of seatpost clamp however. Integral to the frame, but takes the "standard" style rack, as seen in the attachment of this post: http://thecabe.com/vbulletin/showth...-Pacemaker-Chainring-help&p=206760#post206760
So as we've seen, there are two types of racks, but three types of seatpost clamp setups. Pacemaker owners, if you wish to post pictures of your rear racks and how they mount, hopefully we can get a better idea of which rack goes with which seatpost mount, and hopefully this will give us clues as to differences in model years.
In the first picture, the mounting tabs for the rack slope sharply upward to join with the seatpost binder bolt. Here is a closeup of the rack mount:
In this picture you can see how the mounting tabs attach, but look closely at the seatpost clamp; it's integral to the frame, and not a separate piece welded on. The bolt is also positioned higher on the tube than the other "standard" style seatpost clamp, as seen in the attached picture in this post: http://thecabe.com/vbulletin/showth...-Pacemaker-Chainring-help&p=206740#post206740
There's a third type of seatpost clamp however. Integral to the frame, but takes the "standard" style rack, as seen in the attachment of this post: http://thecabe.com/vbulletin/showth...-Pacemaker-Chainring-help&p=206760#post206760
So as we've seen, there are two types of racks, but three types of seatpost clamp setups. Pacemaker owners, if you wish to post pictures of your rear racks and how they mount, hopefully we can get a better idea of which rack goes with which seatpost mount, and hopefully this will give us clues as to differences in model years.
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