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PostPosted: Sun Aug 28, 2011 6:33 pm 
Old School Hero
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Joined: Sun Mar 27, 2011 2:09 am
Posts: 235
Location: Hull, Humberside
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

Image

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
Image

POST MOUNT to LARGER POST MOUNT (LESS COMMON/STANDARD CALIPER ADAPTOR). FIT CALIPER to POST MOUNT accomodating larger size ROTOR/DISC Image
http://www.evanscycles.com/products/shi ... t-ec008658

POST MOUNT
Image

http://www.hayesdiscbrake.com/wp-conten ... -Mount.pdf
Image

I.S. MOUNT (I.S. = INTERNATIONAL STANDARD)
Image

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

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

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!


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PostPosted: Sun Aug 28, 2011 7:37 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Tue Apr 20, 2010 11:29 pm
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Location: South Buckinghamshire
P G I A R M


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PostPosted: Sun Aug 28, 2011 8:25 pm 
Old School Grand Master
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Joined: Fri May 01, 2009 7:11 pm
Posts: 8479
Location: Fircombe.
trickylad wrote:
P G I A R M

Que? :?


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PostPosted: Mon Aug 29, 2011 3:46 am 
Retro Guru
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Posts: 502
Location: Melbourne, Australia
srands wrote:
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???


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PostPosted: Mon Aug 29, 2011 9:04 am 
Old School Grand Master
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Joined: Fri May 01, 2009 7:11 pm
Posts: 8479
Location: Fircombe.
YOU ARE LOBBY LUDD AND I CLAIM MY FIVE BOB! :P


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PostPosted: Mon Aug 29, 2011 10:54 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
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Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
What is this thread about?


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PostPosted: Tue Aug 30, 2011 1:02 am 
Old School Hero
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Joined: Sun Mar 27, 2011 2:09 am
Posts: 235
Location: Hull, Humberside
cyfa2809 wrote:
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.


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PostPosted: Tue Aug 30, 2011 9:02 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Fri Sep 05, 2008 6:36 pm
Posts: 4950
Location: Edinburgh
cyfa2809 wrote:
What is this thread about?


I think cyfa meant

WHATS THE POINT OF THIS POST

Go and take more medication :wink:

G


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PostPosted: Tue Aug 30, 2011 1:19 pm 
MacRetro rider
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Joined: Thu Jul 30, 2009 4:56 pm
Posts: 2475
Location: A Fifer furth o' the Kingdom
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:


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PostPosted: Tue Aug 30, 2011 1:27 pm 
Retrobike's #1 Comedy Genius
Retrobike's #1 Comedy Genius
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Joined: Thu Jan 04, 2007 8:07 pm
Posts: 4104
Location: Wolkenkuckucksheim
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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