Lets talk disk brakes

Discussion in 'Bicycle Repair' started by Fly1, Dec 1, 2014.

  1. Fly1

    Fly1 Member

    I have not got my bike yet & still thinking going cruiser rout.I,m thinking installing a disc break
    up front.Please give me some ideas as the best way to go, & cost is always a factor.Help needed
    for I have no clue in this area of motor bikes.


  2. butre

    butre Well-Known Member

    the cheapest way to get disc brakes is to start with a bike that already has them. cheap hardtail mountain bikes aren't too far removed from beach cruisers, find you one of those and you can have suspension, gears, and at least a front disc brake for a relatively cheap price.

    If you want the cruiser look, the big difference is in the handle bars. throw some beach bars on there, or flip the mtb bars for a faux board tracker sort of look
  3. Robot

    Robot New Member

    Not to brake into another viewpoint but

    I've got an old bike with the 2 stroke 66cc jackshaft and a 3 speed Nexus w/brake hub. The kit does not allow alterative to use the coaster brake. I've got little clearance to mount disk front or back and keep the 2.30 tires on it. That's the minimum I can see placing on the bike @ ~75 lbs.+ 200 lbs. of freight. OK This is an old style setup without much else the side pulls will work but rubber won't for pads. I've just finished one wheel, rough diamond epoxied set into a cup created with a drill ~ 1-1.5mm deep ~3-8 mm diameter. The new surface is set and appears ~1- 2mm above the surface of the wheel. I'm estimating 2 days to testing the setting 16 groups one side of the wheel to start with the opposite side prepped without the stones. Going to cut silver pad for the diamond use rubber pad opposite for now. This is the only alternative to disk brakes that may work as well or better once the pads break in. If it works as well as I'd expect once it's heated some into cure with use it should last a lifetime and glitter some with the silver coin deposited on the diamond and the rim but this app is for the street moreso than the trail but if done correctly should work for both well enough to justify the cost which is not much by compare to a decent set of disk brakes. Anyway the idea has likely been employed by those in racing at a little larger expense. My setup is slightly crude by compare to properly jeweled wheel sets with platinum pads..

    Attached Files:

  4. wheelbender6

    wheelbender6 Well-Known Member

    If you have a cruiser bike and your fork does not have disk tabs (for mounting the caliper), consider buying a
    drum brake wheel. The Sturmey Archer and Nexus (Nexus calls them a roller brake) brakes are not quite as powerful as a disk,
    but will usually save you some money over a disk setup. Drum brakes fit any fork, so you can use a springer fork, Girvin, rat trap,
    triple tree, lowrider or what ever you like.
  5. Robot

    Robot New Member


    Without doubt the Nexus 3 speed jackshafted bike I'm working on is rarely seen I expect it to be one of the quicker and faster bikes out of the box . I just finished up a rear wheel setting 5 carats of rough diamonds the insert is a simple circle about 3 mm diameter cut about 1.5 mm deep in the first of two AS 7's 12 gauge stainless. Ill place a bet that when these side pulls lined with an ounce of .999 silver 1/2 each side fastened and filed hit that diamond these brakes will work better than any offered on the market. Yeah some of the dust will likely scrape off most will without doubt remain.Not only will this setup look great for the money it should last a lifetime with the exception of replacing the pads..the cost per wheel is ~$60.00 a wheel and the application is a must with this setup although time consuming it will prove out the best of any compared..

    Attached Files:

  6. Fly1

    Fly1 Member

    Any thoughts on roller brakes?

  7. butre

    butre Well-Known Member

    as in the nexus roller brake? they're drum brakes, have all the advantages and disadvantages of drum brakes. they don't stop as well as discs and are prone to overheating but they're not sensitive to moisture
  8. Fabian

    Fabian Well-Known Member

    I wouldn't use anything less than an 8" rotor on the front. The rear rotor can be left as standard diameter.

    From past experience, i have found the Shimano SM-RT75 203mm rotor to have excellent dimensional stability when it gets hot


    My personal preference is to try and find the largest rotor that doesn't exist, but then settle for the largest rotor that you """can""" get your hands on. Unfortunately the Hayes V9 (9" or 228mm in the metric system) no longer appears to be in production:

  9. Robot

    Robot New Member

    Yes plenty of thoughts

    I like roller brakes idea but without an axle w/wheel adapter that sides in with a housing that will fiction anchor the wheel
    and lock into the brake it won't work on my wheel. I'm using a natural rough diamond dust epoxy set into keyway made with a drill bit. A powerful brake with a simple touch maybe maybe not I've got the ~.8 mm stones set nicely surrounded by epoxy that cures as nearly hard as aluminum. It is an easy application and I will try a .999 silver brake pad the silver is soft enough not to remove the diamonds in theory. Yeah never heard of it done myself I've got nothing else to do will test it out in a week or so by then the epoxy should be well set. Not too confident yet just hoping the diamonds stay struct in the indention which is not much larger than the pencil point..Yeah I've wasted enough money to buy a new mountain bike with the disk brakes and two kits I'm struggling to currently install on an antique..
  10. KCvale

    KCvale Motorized Bicycle Vendor

    Going disc requires 2 things.
    Mounts for the caliper on the fork, they are called 'brake bosses', and I like front forks that both a disc and V-brake bosses.
    part 2 is the hub, it needs a rotor mount.

    Going bigger rotors is easy, they usually come with the spacer to lift the caliper but still limited by the caliper pads designed totor diameter.

    This is a ~$250 26" Macargi Pantera with a ~$80 front shock fork with both disc and V brake bosses, I put on V's.


    To go disc would mean a new front wheel or at least hub so about another $160 to go disc over V counting caliper and rotor.

    And don't forget your back brake!
    If you are going lever pull in the rear too with a 2-stroke you'll need a dual pull self adjusting brake lever like sickbikeparts.com carries so you can put your clutch on the left.