DISK BRAKE CALIPER MOUNTS: POST MOUNT & IS. DIFFERENT RO

srands

Retro Guru
DISK BRAKE CALIPER MOUNTS Can be confusing for some, why have two standards? Anyway on with relevant details.

TWO TYPES: I.S. MOUNT & POST MOUNT

TECH_Disk_tab_type.jpg


The disc caliper screws to the mount, and in many instances with a caliper adaptor specific to the:
~ MOUNT TYPE (IS MOUNT or POST MOUNT)
~ ROTOR SIZE (160mm, 180mm or 200mm)
~ BRAKE MANUFACTURER (Avid, Shimano, Hayes, Hope, etc)

The caliper adaptor MAY NOT come supplied with your purchased BRAKE SYSTEM, so check first as adaptors are £10+ each

Something worth mentioning about the direct mounting of POST MOUNT, if you cross thread your fork/frame internal threads within the POST MOUNT, then you're knackered!

If you thread your I.S. MOUNT caliper adaptor bracket, "Like it matters", because the adaptor are relatively cheap at about £10, alot cheaper then a new frame or fork for knackered POST MOUNTS!

CALIPER MOUNT ADAPTORS
http://www.chainreactioncycles.com/Cate ... goryID=563

CALIPER ADAPTOR
Larger discs then 160mm will need different CALIPER DISK ADAPTORS (Specific to the brake manufacturer, eg Avid), so that CALIPER will sit the correct distance from the ROTOR.
Also some caliper come without an adaptor POST MOUNT style, hence an adaptor POST MOUNT to IS MOUNT (Or POST MOUNT 160mm to larger 180mm or 200m) is needed for the correct ROTOR SIZE (Eg 160mm, 180mm, 200mm)

POST MOUNT to IS MOUNT (COMMON/STANDARD CALIPER ADAPTOR). FIT CALIPER to IS MOUNT
Caliper%20Adaptor.jpg


POST MOUNT to LARGER POST MOUNT (LESS COMMON/STANDARD CALIPER ADAPTOR). FIT CALIPER to POST MOUNT accomodating larger size ROTOR/DISC
post-mount%20to%20post-mount%20200mm.jpg

http://www.evanscycles.com/products/shi ... t-ec008658

POST MOUNT
post%20MOUNT%20ON%20Fork%20for%20Caliper~2011_fox%20fork.jpg


http://www.hayesdiscbrake.com/wp-conten ... -Mount.pdf
POST%20MOUNT.jpg


I.S. MOUNT (I.S. = INTERNATIONAL STANDARD)
IS%20MOUNT%20(FRAME%20REAR%20DISK)%20.JPG


FRONT IS
http://www.hayesdiscbrake.com/wp-conten ... ont-IS.pdf
FrontIS.jpg


REAR IS
http://www.hayesdiscbrake.com/wp-conten ... ear-IS.pdf
REAR~IS.jpg


NOTE: I have posted this before, but this is beyond comparison, it has pictures, and many many more details. And besides the previous post title you'd never have realised the post was about brakes!
 
Re: DISK BRAKE CALIPER MOUNTS: POST MOUNT & IS. DIFFEREN

srands":3rnt95yp said:
NOTE: I have posted this before, but this is beyond comparison, it has pictures, and many many more details. And besides the previous post title you'd never have realised the post was about brakes!

Do you mean in this thread?

http://www.retrobike.co.uk/forum/viewto ... highlight=

Why would we not think that it is to do with brakes? I mean, i has BRAKES in the title!

and why do you post this stuff???
 
DISK BRAKE CALIPER MOUNTS

cyfa2809":34px2l5k said:
What is this thread about?

DISK BRAKE CALIPER MOUNTS, when you know what CALIPER MOUNTS, individually, your FRAME, and FORK is, and what ROTOR size you will have on the FRONT, and the REAR (Possibly different sizes). Then you know if you need adaptors. Possibly because:
~ You have POST MOUNT (FRAME/FORK), and you gone for larger ROTORS 180mm or 200mm.
~ You have IS MOUNT (FRAME/FORK), and the brake calipers you bought didn't come with adaptor from POST MOUNT to IS MOUNT.
~ You have IS MOUNT (FRAME/FORK), and and you gone for larger ROTORS 180mm or 200mm, the calipers only came with POST MOUNT to IS MOUNT for a smaller size.

In other words, sometimes the LACK of choice (Local bike shop none visible, all adaptors behind counter), or the bewildering choice of many MULTIPLE options of bike parts websites can be confusing, as given some descriptions, you MAY be unsure what you ORDERED or ASKED for is really the right thing, the RIGHT PART, that is.
 
Does the OP not know that there is P0RN available FOR FREE on the internet?
Can't believe he doesn't, what with all the time he spends Googling to write his very informative posts.

But then I READ this,

"DISK BRAKE CALIPER MOUNTS, when you know what CALIPER MOUNTS, individually, your FRAME, and FORK is, and what ROTOR size you will have on the FRONT, and the REAR (Possibly different sizes). Then you know if you need adaptors. Possibly because:
~ You have POST MOUNT (FRAME/FORK), and you gone for larger ROTORS 180mm or 200mm.
~ You have IS MOUNT (FRAME/FORK), and the brake calipers you bought didn't come with adaptor from POST MOUNT to IS MOUNT.
~ You have IS MOUNT (FRAME/FORK), and and you gone for larger ROTORS 180mm or 200mm, the calipers only came with POST MOUNT to IS MOUNT for a smaller size.

In other words, sometimes the LACK of choice (Local bike shop none visible, all adaptors behind counter), or the bewildering choice of many MULTIPLE options of bike parts websites can be confusing, as given some descriptions, you MAY be unsure what you ORDERED or ASKED for is really the right thing, the RIGHT PART, that is."

and think, "WTF does it mean?" :facepalm:

If that is how he communicates with his LBS, no wonder he's not getting the correct parts. :LOL:
 
Aye, there's nowt about disc brakes that isn't a total pain in the arse, aside from their stopping power.






less than 20 words. :p
 
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