this post was submitted on 21 Aug 2025
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Hi all,

Wondering if anyone can help me with this question before I spend my money on a different mount for this caliper.

I am going to increase my front rotor size but what is printed on the side of my current mount has me confused. It says 160mm or 180mm implying that this mount can be used for both but surely the pads need to be in a different position for each size of rotor? I can't just bang a 180mm rotor on and change nothing else and expect it to work fine can I?

Can anyone clarify for me what this text on the side of the mount is getting at, am I able to use this mount for the bigger rotor somehow? If so how?

I plan on taking it apart this weekend and trying it out for sizing before I order a different mount but in my mind the caliper would need to be pushed further out to make space for the increase in size for the rotor and was hoping someone could enlighten me on what this text actually means whilst I plan the work in my head :D

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[โ€“] theskyisfalling@lemmy.dbzer0.com 2 points 2 months ago (1 children)

I hear what everyone is saying but in all my years of cycling I've never once seen a fork state a size of rotor it is rated for.

I have looked for specs on this one since people have been saying and again no where does it state a rated up to "x" rotor size. I really think it is very unlikely that a 20mm increase will cause me any issues I'm willing to yolo it. I'm happy for people to mock me and sayi told you so if it snaps and I post the aftermath xD

I more want it for improved cooling, stopping power isn't an issue. I also can't see the difference between adding two pistons and adding a bit of diameter. Both will increase forces exerted on the form so if it is gonna snap either of those options will do so.

Anyway, warnings from everyone heeded, I'll still be going for it xD

[โ€“] avidamoeba@lemmy.ca 2 points 2 months ago* (last edited 2 months ago) (1 children)

Get an Ice Tech Freeza (Shimano) instead of fucking around:

Also, once you wake up in the hospital, come back and reply to this thread so we can mock you. ๐Ÿ˜„

E: BTW your logic about the load from better calipers and pads being potentially equivalent to larger rotor is sound. Caliper/pads would only be safer if there's a dramatic difference in the moment between the rotor sizes that's larger. Could easily not be large enough. Someone who's studied more physics might have a better idea.

E2: I definitely hope you don't end up in the hospital!

I'll be sure to check in after failure :p

Nah seriously I appreciate peoples concern and it isn't like it isn't a risk I haven't considered at all but think it is a risk that is fine to take weighing up all sides.