February 06, 2012, 05:43:53 AM

Author Topic: Avid calipers and 180 rotors instead of 185....?  (Read 459 times)

Offline The Llama

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Avid calipers and 180 rotors instead of 185....?
« on: April 11, 2011, 03:28:08 PM »
OK, soo getting tired of the stupid little mouse squealing his ass off every time I hit the front brake.  >:(  So, going to get him to pull his friggin tail back and keep it out of my way when riding!  ;D   How?, well by going to a 180 rotor on the front. Now I know the weight weenies say the 160 is fine up front, and it does work, But I'm hearing more and more about manufacturers just out right recommending a 180/185 rotor with 29er wheels. There is just WAY more rotational force on the bigger wheel, there's a lot more science behind it, but when it all comes down to it, that's the simple answer.  :tongue:


Now the big issue,...
I don't want to use Avid's big heavy dish plate of a rotor, but... Avid's systems only come in 185 where everyone else in the whole world uses 180. Yup, Sure,.. you can run a 180 rotor with the caliper on a 185 mount, and it'll work.. but if you'd tell me I should.. well,.. then you just don't know me very well!! :wink:


So I ordered up a generic type 180 front Disc Brake mount for a IS style mount. and went to Pricepoint.com and ordered an Alligator Serration Disc Brake Rotor 180mm. (which I'm waiting for the Big Brown Truck to deliver as I'm typing here...)  :undecided: but I started to play with the brackets  and quickly discovered why most people think you can't just use any old bracket with the Avid calipers....










As you can see the little tab is going to hit the mount, and it's not even all the way over to where it's going to sit.  :-[   Ahh.. but again.. it's me!!!  just going to hack off the tab with the dremil tool... as you can see I have already done it on the other side to clear the Magura Venti-Discs I was trying out before..

Well of course my dremil battery is dead so I came in here and started this..  Waiting.. Big Brown truck,, battery.... AHHHHHHHHH  :madfire:   my patience is wearing...
May your last ride not be, "your last ride"!!

Offline The Llama

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Re: Avid calipers and 180 rotors instead of 185....?
« Reply #1 on: April 11, 2011, 07:21:13 PM »
well, Battery to dremil all charged so out I went and cut the tab....

I probably didn't need to hack it sooooo short, but who cares, they are old pads that I will be replacing soon...  :tongue:
while waiting for the delivery truck I went and weighed the brackets....


Old Bracket



New Bracket

ECKKKK adding 10 whole grams.. the weight weenies begin to cry!!! :'(
well did a little cleaning and finally the Big Brown Truck came...  :blob:


soo ripped open the box and whipped out the new rotors... (got a new 160mm to match for the rear   :wink: )

the New Dinner Plate....



hmmm look.. savings....?


Old heavy ass Avid 160...


ooowwweeeee even more saving... :cheesy:



The weight weenies rejoice!! :jammin: :gtar:


total weight change...
  • added 10 grams with the bracket.
  • minus 20 grams with the bigger front rotor...
  • minus 40 grams with the new rear rotor.

total... -50 grams off the bike 

WOOHOOOO!!!  and the weight weenies go crazy!!! :rah:


well put it all together and everything works great!!  looks good too!!


more after I get a few miles on her... (hopefully tomorrow!!) :cheesy:
May your last ride not be, "your last ride"!!