51mm Caliper to 74mm post?
12-14-16, 07:07 PM
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51mm Caliper to 74mm post?
Hi! I have some old Hayes MX-1 mechanical disk calipers, 51 mm IS that I would like to mount on a rear frame that has 74 mm post mounts. The rotors are 160 mm. Can I do this? If so, would you please point me to a link on Amazon or one of the bike sites where I can find the adapter. Thx!
12-14-16, 07:42 PM
#2
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I believe this is the part you need.
NEW KCNC DISC BRAKE ADAPTOR POST MOUNT FORK TO IS 160MM CALIPER, RED | eBay
Note, there are some potential clearance and frame fitment issues. I have one to adapt some old XTR calipers, but haven't had a chance to test fit it.
NEW KCNC DISC BRAKE ADAPTOR POST MOUNT FORK TO IS 160MM CALIPER, RED | eBay
Note, there are some potential clearance and frame fitment issues. I have one to adapt some old XTR calipers, but haven't had a chance to test fit it.
12-15-16, 01:17 AM
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What's the frame and are you sure that it has post mounts on it.
12-15-16, 09:24 AM
#4
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There are disc brake Adapters .. the caliper it self can direct mount to post mount, on say your suspension fork.
if it has an ISO Type mount , those holes are 90 degrees from those
there is where you bolt the adaptor, then bolt the caliper to the edge of the adapter..
Its a really common parts combo..
Maybe you just need need to shop for a different Brake caliper.. ? One that WILL fit your post mounts?
'/,
if it has an ISO Type mount , those holes are 90 degrees from those
there is where you bolt the adaptor, then bolt the caliper to the edge of the adapter..
Its a really common parts combo..
Maybe you just need need to shop for a different Brake caliper.. ? One that WILL fit your post mounts?
'/,
Last edited by fietsbob; 12-15-16 at 09:28 AM.
12-16-16, 12:14 AM
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Some of the older brake sets came with a post front caliper and IS rear caliper (XTR 970 for example). To re-use them on a more modern frame you need to convert the frame to having IS mounts, which requires the adapter I linked above. But since post mount is a better package, there can be some clearance issues.
12-16-16, 01:07 AM
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Photos of the brake & frame mounts might be useful in this thread.
The only Hayes MX-1 I've ever seen is a post mount caliper.
example: https://www.hayesdiscbrake.com/wp-co...4/mx1-full.jpg
The only Hayes MX-1 I've ever seen is a post mount caliper.
example: https://www.hayesdiscbrake.com/wp-co...4/mx1-full.jpg
12-16-16, 09:41 AM
#8
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ISO frame Tab to post mount adapters , are about as common as .. can be..
they are the piece that mounts the disc caliper so they come (marked) in sizes of disc..
NB: because of manufacturing conventional standards ..
same adaptor fitted on front is for a different, smaller disc size than if it were used on the rear ..
160-140; 180-160 ; 180-210, etc
...
they are the piece that mounts the disc caliper so they come (marked) in sizes of disc..
NB: because of manufacturing conventional standards ..
same adaptor fitted on front is for a different, smaller disc size than if it were used on the rear ..
160-140; 180-160 ; 180-210, etc
...
12-16-16, 09:47 AM
#9
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12-16-16, 10:59 AM
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Damn! I feel totally stupid. You guys are right. The caliper is 74 mm post mount. So sorry to have bothered everyone. At least I'm learning more every day!!
