IS-to-PM Adapter for 170mm Rotors: Does Such a Thing Exist?
11-10-22, 10:12 AM
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IS-to-PM Adapter for 170mm Rotors: Does Such a Thing Exist?
... or does one need to get creative with spacers and washers to make it work? I've seen this SRAM/Avid +30mm rear adapter, but all I found for the front brake was this kit; I never could never find a proper "170mm" adapter.
11-10-22, 10:46 AM
#2
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Searching around I found quite a number, such as these from Wiggle or this one from Amazon (UK).
I also found a number on Ebay. I think part of the confusion is that a number of them are described as post to IS mounts, but when you read the text they are actually for mounting on IS frames/forks.
I also found a number on Ebay. I think part of the confusion is that a number of them are described as post to IS mounts, but when you read the text they are actually for mounting on IS frames/forks.
11-10-22, 10:52 AM
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Searching around I found quite a number, such as these from Wiggle or this one from Amazon (UK).
I also found a number on Ebay. I think part of the confusion is that a number of them are described as post to IS mounts, but when you read the text they are actually for mounting on IS frames/forks.
I also found a number on Ebay. I think part of the confusion is that a number of them are described as post to IS mounts, but when you read the text they are actually for mounting on IS frames/forks.
11-10-22, 11:07 AM
#4
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I'm sorry - I think you missed the point of my OP. The question was about adapters to suit a specific (and largely obsolete) rotor size, and not about mounting interfaces. There's no shortage of IS-to-PM adapters for 160mm, 180mm and 203mm (front) out there, but there are no 170mm adapters to be found.
11-14-22, 12:43 AM
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So, how, then, did old-timey MTBers fit old-timey disk brakes with 165mm and 170mm rotors to old-timey MTBs in the 1990s and 2000s?
11-14-22, 12:58 AM
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two 5mm stacks... and two longer bolts.
the pivot can also be used to align the caliper during a standard centering adjustment.
Last edited by maddog34; 11-14-22 at 01:07 AM.
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11-14-22, 01:02 AM
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What about the early factory disk brake bikes? What kinds of adapters did they use?
