1. The most important thing about buying a new bike is to make sure it fits. The only way you'll know if the bike is right for you is to size up the bike and make sure that the bike's geometry matches your body's geometry. Ask questions and do some research.
mtn. biking 101
2. If possible, try to find a shop that will let you demo the bike on real dirt. Five minutes in a parking lot won't cut it. You wouldn't buy a car without a real world test drive, and a bike should be no different.
3. Don't belive the hype. Just because your favorite rider or best friend rides a certain bike, that doesn't mean that's the best one for you. Have an open mind and be realistic about your needs and ability.
Results 1 to 19 of 19
  1. #1
    mtbr member
    Reputation:
    Join Date
    May 2008
    Posts
    41

    Disc Brakes on an older bike??

    I have a 2004 Marin Bolinas Ridge and was wondering if there was a way to get disc brakes on the rear. I have a new shock that is disc brake compatible, but the rear doesn;t look like it has the right mounts. Is there an adapter or something for older bikes?? Thanks


  2. #2
    re member
    Reputation: net wurker's Avatar
    Join Date
    Sep 2007
    Posts
    6,832
    Whattchu tallkin bout, Willis??? A disk-compatible shock? Not sure what that means, and not sure how you plan on mounting a shock on a hardtail?

  3. #3
    mtbr member
    Reputation: lamp no 3's Avatar
    Join Date
    Jun 2008
    Posts
    144
    Well I recently got a new bike with disc brakes,And I'd say go for the disc brakes if you have money, but if you got disc brakes, you'd have to get wheel hubs that would be disc brake compatible.Check if you have 2 holes by the back of the bike by the rear hub to see if you could mount the disc brakes.Does that answer your question, lol? :- )

    BTW the front forks, they aren't shocks, they are called forks.

  4. #4
    Ride the dream
    Reputation: EnglishT's Avatar
    Join Date
    Apr 2008
    Posts
    1,381
    Quote Originally Posted by lamp no 3
    BTW the front forks, they aren't shocks, they are called forks.
    Both are technically correct names for them.

    As some anal people would point out....

  5. #5
    re member
    Reputation: net wurker's Avatar
    Join Date
    Sep 2007
    Posts
    6,832
    Oh, fork. Duh. I couldn't figure out what he was saying.

    Yeah, you will need to swap out your hubs to go to disk brakes. And replace the fork. I am not sure about mounting the rear brake calilper, if it is possible. You may want to post this in the brake forum.

  6. #6
    Ride the dream
    Reputation: EnglishT's Avatar
    Join Date
    Apr 2008
    Posts
    1,381
    Cant see any mounts for a rear disc brake - thats gonna mean a new frame....

    Then again, you could always go oldschool and put Magura Hydraulic rim brakes on it... now those are cool

  7. #7
    mtbr member
    Reputation:
    Join Date
    Oct 2007
    Posts
    58
    You will only be able to put disc brakes on the front on that bike. you will have to change out the front hub to a disc compatible hub. meaning a new front wheelset would be the way to go.

    The rears. sorry. you are out of luck on those. But on the bright side.. 60-80% of your braking is done on the front. so you don't need disks in the back.(no mounting spots for calipers. and doubt there is proper clerance.) You can look for a rim brake upgrade for the rears that will give you ample stopping power. and ride disks in the front. nothing wrong with that

  8. #8
    mtbr member
    Reputation:
    Join Date
    Jun 2007
    Posts
    249
    You could try the A2Z Dm-UNI disc brake frame adapter. Only place Ive found them was on Ebay but a few have used them with success here. Otherwise, since most of the braking is done by the front, just out the disc brake up front and leave a v brake on the rear. You will need disc compatable hubs as stated before as well as longer brake cables to reach the caliper(s).

  9. #9
    I post too much.
    Reputation: snaky69's Avatar
    Join Date
    Mar 2005
    Posts
    6,448
    You need new wheels, an adapter for the rear to accept disc, plus the discs themselves, IMO it's not worth it.

  10. #10
    mtbr member
    Reputation:
    Join Date
    Dec 2005
    Posts
    2,440
    brake therapy and WOOdman both offer kits. mind you, this whole endeavor will be a little expensive. you need brakes, new hubs, and this kit and you have to be mechanically inclined.

    i very successfully used the WOOdman kit. however, it would almost just be my suggestion to leave your bike alone and keep it as rim brakes.

    good luck

    mx

  11. #11
    mtbr member
    Reputation:
    Join Date
    May 2008
    Posts
    41
    Quote Originally Posted by BlurredVision
    You could try the A2Z Dm-UNI disc brake frame adapter.
    Cool that looks like it would do the trick!! I'll look into it. Thanks everyone for the advice!!

  12. #12
    mtbr member
    Reputation:
    Join Date
    Jul 2007
    Posts
    392
    Yeah, if you absolutely have to go disc, because you have been sold by the hype (hey, I have been hehe) then you have a couple options. As others ahve said, there are adapters you can get for the rear to be able to mount the caliper, then you need a new wheelset, the brakes themselves...etc....

    Might I suggest that you look at running a disc on the front, and a rim brake on the rear. I recently upgraded my wife's bike this way. It is a HECK of a lot cheaper, as when I totalled it up for my wife:

    New levers (to upgrade from her crappy v-levers): $30 for SD-7s
    New Front disc: $50 for BB-7
    New Rear Disc: $50 for bb-7
    Rear Disc Adapter: $70 (for adapter, plus S & H)

    So you're looking at $200 (ballpark) to go full disc on a bike, and that doesn't include the wheelset, which I had a spare disc set, that was also rim compatible. So if you're going full disc, factor in another $150 minimum, and UP, depending on the quality you're looking for.

    Or, if you went disc front, rim rear, you can drop the $70 for the adapter, and the rear brake goes from $50 to $30 for the SD-7 rear brake I bought my wife, but she (and you) could have kept the rear rim brake you've got. You'll still have to get a disc wheel for the front, but you don't for the rear. So you'll save at least $150 - 200 by not going disc for the rear, and will have just as good a brakign system as if you went full disc.

    Good luck,

    Tim

  13. #13
    mtbr member
    Reputation:
    Join Date
    Dec 2005
    Posts
    2,440

  14. #14
    Don't touch me!
    Reputation: beeristasty's Avatar
    Join Date
    Jan 2004
    Posts
    775
    If I had to do it again, I would definitely go with the Woodman or BT adapter vs. A2Z's. Don't get me wrong, it does its job on my beater, but for my mtb, I'd feel much more comfortable with one of the other 2.

    My main gripes:
    1) the A2Z can shift fore and aft a little
    2) the inner and outer plates add some extra width to the drop outs, causing my rear skewer's nut to barely thread onto the shaft.
    3) there's a plate that butts up against the seat stay - not sure if a frame is designed to handle braking forces from this area

    Just a note, but your dropouts don't look like they'd play well with the A2Z adapter.
    [SIZE=3]No offense to KB, but if I see another "Strong, light, cheap. Pick two" line on this site...

    [/SIZE][SIZE=1]MCM# eleventy billion

    [SIZE=2]No offense to thieves, but if I see another "Ride it like you stole it" line on this site...[/SIZE]
    [/SIZE]

  15. #15
    mtbr member
    Reputation:
    Join Date
    Dec 2005
    Posts
    2,440
    i would lean towards brake therapy unless you're a good mechanic. the WOOdman worked great, but i had to do a lot of my own problem solving and i had to lace a wheel with their hub

    mx

  16. #16
    i call it a kaiser blade
    Reputation:
    Join Date
    May 2008
    Posts
    747
    just run a disc in front and upgrade the rear to a single digit 7.

    there's nothing inherently wrong about mixing and matching.

    it just looks... different.

  17. #17
    rebmem rbtm
    Reputation:
    Join Date
    Apr 2007
    Posts
    2,905
    Disc brake on the front is all you'll need, you've got a XC hardtail and if you ride it the way it's meant to be ridden adding a disc on the back won't make much of a noticeable difference except for lightening the weight in your back pocket and adding more weight to the bike. There's been a few instances, not often but it has happened where some of these disc brake adapters have actually caused damage to frames, these brake adapters would probably also void a frames warranty. A few years ago some bikes were built with discs on the front and V's on the back, it wouldn't look out of place with only one disc on it.

  18. #18
    Cheezy Rider
    Reputation: Rufudufus's Avatar
    Join Date
    Apr 2004
    Posts
    1,684
    I've seen pictures of bikes with the woodman-type adapters where the brake post busted off the frame, they're not designed to sustain force from that direction.

    I run a hydro disk in front and a v-brake on the back, looks funky but who cares?

  19. #19
    Alien Surf Team
    Reputation: Razorfish's Avatar
    Join Date
    May 2008
    Posts
    1,169
    I don't know what some of the comments about XC hardtail brake requirments being any different. It doesn't matter. If you're on a steep technical downhill you're going to be hammering the brakes just as much as any FS AM or downhill bike.

    My bike has disc brakes and my son's doesn't. We ride together and often on the long descents we switch bikes because his hand gets tired. There's definitely a difference. Here's what I've done. Disc conversion on the front of his bike. Due to weight transfer the front does most to all the stopping so I'm not converting the rear.

    - BB7
    - New cable
    - Budget front wheel.
    - Original stock levers worked fine.
    - Shock already has disc brake mounts.
    = about $120.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •