chuyskywalker
10 kW
While I'm working on my torque arm extension, part of the setup is replicating the rear wheel IS Mount (aka I.S. Mount / International Standard Mount / ISO Mount / forum-search-term-stuffing) on the extension arm.
![zoom-out.png zoom-out.png](https://endless-sphere.com/sphere/data/attachments/190/190128-2ad39ecae08b70e0901678de1308c46d.jpg)
However, in both this design and the previous version, the mounts seem to work with 160mm adapters, but the 203mm adapter doesn't get the caliper in the right spot.
Above, with the 160 rotor and adapter, everything lines up very nicely:
![160.png 160.png](https://endless-sphere.com/sphere/data/attachments/190/190126-87f3e72fd21bc42f22fb119b4246b39a.jpg)
However, when you go with the 203 adapter, it's completely misaligned:
![203.png 203.png](https://endless-sphere.com/sphere/data/attachments/190/190125-ca2fee87a562ed05eb768fd1b973c0d6.jpg)
I'm designing the mount points from this diagram, which I've found referenced quite a few places:
![rear-is-mount-dimensions-diagram.png rear-is-mount-dimensions-diagram.png](https://endless-sphere.com/sphere/data/attachments/190/190127-7740c0f9ee9bcde5f3c03006ef2306c6.jpg)
And using a few models (caliper, 203 adapter, 160 adapter) for the 3d simulation.
What am I missing as to why this goes out of alignment?
![zoom-out.png zoom-out.png](https://endless-sphere.com/sphere/data/attachments/190/190128-2ad39ecae08b70e0901678de1308c46d.jpg)
However, in both this design and the previous version, the mounts seem to work with 160mm adapters, but the 203mm adapter doesn't get the caliper in the right spot.
Above, with the 160 rotor and adapter, everything lines up very nicely:
![160.png 160.png](https://endless-sphere.com/sphere/data/attachments/190/190126-87f3e72fd21bc42f22fb119b4246b39a.jpg)
However, when you go with the 203 adapter, it's completely misaligned:
![203.png 203.png](https://endless-sphere.com/sphere/data/attachments/190/190125-ca2fee87a562ed05eb768fd1b973c0d6.jpg)
I'm designing the mount points from this diagram, which I've found referenced quite a few places:
![rear-is-mount-dimensions-diagram.png rear-is-mount-dimensions-diagram.png](https://endless-sphere.com/sphere/data/attachments/190/190127-7740c0f9ee9bcde5f3c03006ef2306c6.jpg)
And using a few models (caliper, 203 adapter, 160 adapter) for the 3d simulation.
What am I missing as to why this goes out of alignment?