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Discussion Starter · #1 ·
I'm looking to upgrade my rear brake from a 160 to a 200mm disk.

I'm looking for a bracket to adapt the caliper to the correct angle + distance.

Google hasn't shown me the way so I came hoping you all can tell me if such a adapter exists?

Maybe I can combine two adapters?
 

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What brake? And I'd probably recommend a 180mm rotor for the rear. Unless you're a big time rear brake dragger, 200mm in the rear is a bit overkill. IMHO at least.


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Discussion Starter · #3 ·
I figured out I can combine two adapters to make it work - Pics to follow.

2013 Specialized Camber 29.
Rear has a post mount for 160mm but factory ships with 180mm + adapter.
The front fork has a 180mm mount and a 203mm adapter.

I guess that I am a big time "rear braker", I do a lot of fast switchback downhill runs where I drag the brakes enough to fishtale around corners to keep speed up.

I want less fade from heat and to keep it biting more strong.

Repeating this back and forth every 100 feet for a few miles takes a toll on the rear brake.
My idea was to go with a larger disk first and if that doesn't do the trick I'll get piston caliper.
 

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With 160mm rear post mounts you'll need the same adapter as you'd use on 160mm front post mounts.

If your frame has 160mm post mounts you would only need the top adapter that you have on that photo.
You would also need to flip that top adapter around the other way too as it's on backwards


The front fork has a 180mm mount and a 203mm adapter.
It would have to have 160mm post mounts and a 203mm adapter if you are using a 203mm rotor.
 

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Discussion Starter · #6 ·
I was mistaken, before.
Both the front and back frame mounts were 160mm on the frame and fork.
So, the adapters are 160-203 and 160-180.

I will try to move the adapters around like you say.
 

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trying to do something similar... so, to be clear...
on the rear. Stock are 160MM posts. You installed 160-203 adapter.

Question: where did you find a rear 160->203 adapter?
Or... are the front and rear adapter the same (even though Shimano sells them marked as either "front" or "rear"?)

thanks!
 

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Stock are 160MM posts. You installed 160-203 adapter.
Question: where did you find a rear 160->203 adapter?
Or... are the front and rear adapter the same (even though Shimano sells them marked as either "front" or "rear"?)
A front 203mm adapter is being used on the rear.

Front and rear 160mm post mounts have the same specs so a front adapter will work on the rear.
 

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Discussion Starter · #14 ·
Not always true.
Some rear triangles on bikes need a specific angled adapters for 203mm and 180mm.
Even if a front mount can fit it may not break properly.

I tried the same thing and found out the hard way when my rear brakes only had half power.

Additionally, sometimes diff manufactorers brake adapters have different angles like my factory Tektro brake adapters would not fit my Shimano XT calipers to the proper angle to bite.

I bought all shimano adapters and it brakes correctly now.
 

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Discussion Starter · #15 ·
They have only two main adapters which all start from 160 and convert up to either 180 or 203.
160-180 *
160-203 *
 
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