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Disc brake mount education

Old 07-30-17, 01:51 PM
  #1  
Donto
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Disc brake mount education

I'm going to change out my TRP Spyre mechanical brakes, not a fan. Based on some reviews I'm looking at either a quick change to TRP HY/RD (pretty cheap for a set on ebay) or full hydraulic change out to a Shimano RS505 kit.

My initial question is on mounting of the HY/RD calipers. I see TRP lists HY/RD Flat Mount and also just plain HY/RD. Then there's all the different adapter posts available.

Please correct me if I am wrong on the following. Based on the pix below of my current mech caliper mounting below, I have a Flat mount fork/frame and the calipers are post mount hence the U shape adaptors, correct?

If so, than I can pick up I can the "plain" HY/RD and mount on my existing adaptor posts. Or I can use the HY/RD Flat mount calipers and have to use the TRP FF-5 and FF-6 flat mount adapters on the bike fork/frame.

I just want to make sure I have this all correct before I go spending some (more) $. Thanks

Front


Rear
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Old 07-31-17, 09:39 AM
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Pics aren't showing. You're on the right line of thought though.

If the pics on Diamondback's site are correct for a 2017 Haanjo Carbon Comp, your frame and fork have flat-mounts. They have flat-to-post-mount adapters installed. The brakes are post-mount (which is fairly standard).

You could buy the standard brakes and use the installed adapters. OR you could buy the post-mount brakes and use no adapters... which would look a whole lot better.
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Old 07-31-17, 03:00 PM
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Originally Posted by OneIsAllYouNeed View Post
Pics aren't showing. You're on the right line of thought though.

If the pics on Diamondback's site are correct for a 2017 Haanjo Carbon Comp, your frame and fork have flat-mounts. They have flat-to-post-mount adapters installed. The brakes are post-mount (which is fairly standard).

You could buy the standard brakes and use the installed adapters. OR you could buy the post-mount brakes and use no adapters... which would look a whole lot better.
Thanks man. Interesting you cannot see the pix, I see them.
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Old 07-31-17, 08:42 PM
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Originally Posted by Donto View Post
Thanks man. Interesting you cannot see the pix, I see them.
He's not the only one who can't see them. I believe it's just you.
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Old 08-02-17, 12:58 PM
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you need to post those pics somewhere else, like flickr, or upload them here as an attachment. The forum you posted them on will not show them to anyone that isn't logged on.
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Old 08-07-17, 08:39 AM
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Originally Posted by unterhausen View Post
you need to post those pics somewhere else, like flickr, or upload them here as an attachment. The forum you posted them on will not show them to anyone that isn't logged on.
No worries, Bike shop confirmed my thoughts on this and have some FM HY/RD inbound.
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Old 04-15-20, 08:08 AM
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Originally Posted by Donto View Post
No worries, Bike shop confirmed my thoughts on this and have some FM HY/RD inbound.
Just so we're all clear here.

Both of your calipers are post mount.

Front: what is that fork mounting standard? Looks like post mount to post mount? interesting.

Rear: Simply flat mount to post adapter.

Edumacate us OP!
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Old 04-15-20, 10:55 AM
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He also has flat mount in the front.

Although not sure what you paid for those HY/RDs but rbp has RS505 levers with flat mount calipers (hydro) and rotors for ~180 with coupon which is a great deal. The RS505 levers are actually underappreciated and their shape resembles the new GRX in that the master cylinder is not a bulgy thing that sticks out.

Also fun fact, the RS505's have servo wave while the newer R7000 105's do not which I find odd.

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Old 04-21-20, 06:42 PM
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You will love the Hy/Rds, but be very careful to install them exactly as the directions indicate. Be sure the caliper arm fully opens under no lever pull, otherwise the hydraulics in the caliper will not be able to auto adjust for pad wear. DO NOT take up slack with a bit of tension on the lever arm. I am convinced that if Shimano had invented the cable-hydraulic caliper first then we would all be using it instead of full hydros!
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Old 04-21-20, 06:45 PM
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As this thread is 3 years old, I'm betting he figured it out.
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Old 04-21-20, 07:15 PM
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Originally Posted by katsup View Post
As this thread is 3 years old, I'm betting he figured it out.
Strange. Somebody bumped up the thread but then deleted their post. Made me look like I did it lol.
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Old 04-21-20, 09:13 PM
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Originally Posted by shoota View Post
Strange. Somebody bumped up the thread but then deleted their post. Made me look like I did it lol.
Ha, I was wondering what motovated you read thru 3 year old threads about mechanical disc brakes!
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Old 04-21-20, 09:54 PM
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The mystery poster was a spammer
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