Results 1 to 12 of 12
  1. #1
    mtbr member
    Reputation:
    Join Date
    Aug 2013
    Posts
    4

    Custom Rim Brake Build

    Hi All -

    Brand newbie here.

    I want to build an ultralight xc hardtail and looking for recommendations. I want a 650b FRAME in carbon, titanium, or scandium that is compatible with rim brakes. Does anyone know of such A FRAME? (FYI I ride about a 16.5 - 17" frame.)

    Just because I know you're all going to give me crap, I want rim brakes because I weigh 105 lbs., and I'm building an ultralight bike, so I just don't need a lot of stopping power. Plus, living in New Mexico, I rarely ride in wet, muddy conditions.

    Thank you!

  2. #2
    Moderator Moderator
    Reputation:
    Join Date
    Jan 2004
    Posts
    3,840
    Rim selection (or, to be more accurate, lack thereof) is going to mean your rim brake setup will be heavier than a nice disc setup anyway, just go disc. You will not find any 650b production frames for rim brakes. Heck, I'm struggling to think of any 29" or 26" ones either...

    -Walt
    Waltworks Custom Bicycles
    Park City, UT USA
    www.waltworks.com
    waltworks.blogspot.com

  3. #3
    mtbr member
    Reputation:
    Join Date
    Aug 2007
    Posts
    2,008
    The only new rim I can think of is the PL23, and that's more of a road/CX rim. ~400g.

    You could try to source some old ZTR 355's, but then your stuck with nothing when those rims wear out.

    I would source an old frame with V-brakes and make it work some some adapters.

    I'd personally go disc. Even people that weigh 105lbs need better modulation........maybe you could go 140 front and rear to an ultimate weight weenie.

  4. #4
    mtbr member
    Reputation: smilinsteve's Avatar
    Join Date
    Jul 2009
    Posts
    5,669
    I fully support your preference for rim brakes.

    If you are willing to pay for a custom frame I don't see why it would be a problem to get the brake mounts added.

    If you plan on having a front suspension fork, that could be more of an issue.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Aug 2013
    Posts
    4
    They do make them in 29ers. The Voodoo Bokor or the Astrix Rook frames are a possibility (because they're aluminum,) but I wanted to see if there's anything else lighter. (My post was actually asking for frame recommendations, not rim recommendations.)

    Also, a set of Stans rims (discontinued, I'd be searching online) called the ZTR 355 is about 800g for the pair and can do rim brakes.

    So are you sure I'm necessarily looking at more weight? Thanks Walt.

  6. #6
    Moderator Moderator
    Reputation:
    Join Date
    Jan 2004
    Posts
    3,840
    Yes, I am sure. The 355s are pretty light but they're A) discontinued, and B) heavier than quite a few disc-specific options now. Can you manage to scrounge up enough old high end rim brake parts to save 50g? Sure. Will you regret it in a year or two? Probably.

    If you just inherently don't like disc brakes, that's a legit reason to do this, but weight really is not. Plus, if you go the disc route, you can pick out a frame that is light AND a geometry that suits you (which is WAY more important), instead of letting the brakes determine everything about your frame choice.

    -Walt
    Waltworks Custom Bicycles
    Park City, UT USA
    www.waltworks.com
    waltworks.blogspot.com

  7. #7
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    101
    My 650b bikes are all rim-braked; the mtb is using v-brakes. However, as a Rivendell, it's lugged steel... I'm not counting ounces on it.

    Actually, I would suggest you consider something like a Rawland Sogn if you can locate one, or, maybe get ahold of Spooky: http://www.spookybikes.com/custom

    Good luck...

    -L

  8. #8
    mtbr member
    Reputation: SteveF's Avatar
    Join Date
    Mar 2004
    Posts
    1,354
    Velocity makes a couple of rim-braked rim options. I've used Synergies with 2.3 Neomotos without issue. They are a bit heavier than 355s but are readily available and made for rim brakes whereas 355's are mainly for disc brakes. Frankly, i wouldn't trust them to work that well or last with rim brakes.

    If rim brakes are what you want, stick to your guns. There's nothing wrong with them. Even if they don't save you much weight, the simplicity, cost and user-service-ability make them a valid choice.

  9. #9
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    101
    Pacenti makes some 650b rim-braked rims, but yes, all of mine are Velocity. Synergy on the Bombadil, but also on my rando, I'm running their A23 in 650b, too.

  10. #10
    mtbr member
    Reputation: SteveF's Avatar
    Join Date
    Mar 2004
    Posts
    1,354
    Quote Originally Posted by LNBright View Post
    Pacenti makes some 650b rim-braked rims, but yes, all of mine are Velocity. Synergy on the Bombadil, but also on my rando, I'm running their A23 in 650b, too.
    Yeah, I have a set of A23's on my Rawland Stag-nice rims. I got them from Longleaf cycles but I think he's out of them. Tho I read that Boulder/Herse bicycles might get some in. I also have a set of Pacenti PL23's-nice road rims but they're mighty light for trail use-dunno if they'd be up to it.

  11. #11
    Si Vis Pacem, Para Bellum
    Reputation: CannondaleF9's Avatar
    Join Date
    Nov 2012
    Posts
    1,952
    Disks are lighter, and there is a larger selection to choose from.
    Don't do rim brakes, you will end up with a heavier bike than you want.
    There are no carbon frames with rim brake dropouts in my knowledge, and definitely no good forks (RockShox Recon Gold and up).
    Big Wheels Keep On Rolling

    Forth Eorlingas!

  12. #12
    the new Gilbert Grape
    Reputation: laffeaux's Avatar
    Join Date
    Jan 2004
    Posts
    5,187
    As others have said the Velocity Synergy is a nice rim, but it's not super light (but not that heavy). The bigger issue will be with a fork. If you wan tot go rigid, no problem. If you want a suspension fork you'll need to have disc brakes.
    Each bicycle owned exponentially increases the probability that none is working correctly.

Similar Threads

  1. Custom Rim Brake Build
    By km87508 in forum 29er Bikes
    Replies: 10
    Last Post: 08-28-2013, 08:43 PM
  2. How to adjust your brake levers for a custom fit
    By Scimitar in forum Beginner's Corner
    Replies: 1
    Last Post: 02-20-2013, 06:18 PM
  3. Custom brake adaptor for V-brakes
    By xc71 in forum Families and Riding with Kids
    Replies: 38
    Last Post: 08-02-2012, 12:48 PM
  4. Custom brake levers ?
    By simonm in forum Frame Building
    Replies: 10
    Last Post: 11-16-2011, 09:27 AM
  5. Custom Brake Levers
    By trythis in forum Frame Building
    Replies: 9
    Last Post: 10-16-2011, 08:40 AM

Posting Permissions

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