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  1. #1
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    Default Front Brake Rotor Question

    So I have a 21" spoked front wheel and I just ordered a caliper from TcBros. I got it all in the mail, and then put the rotor on the hub, got it all mocked up on the bike with the springer front end, and the rotor is actually too close to the hub. The caliper hits the spokes when the wheel is turned. Do they make spacers to go between the rotor and hub that would allow the rotor to be farther away from the hub just so the spokes can clear the calipers? Any info would be helpful!

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    Yes, they are called "rotor spacers" or "shims"
    Keep in mind you will have to space the caliper too.
    Pics would help us be more specific.

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    Quote Originally Posted by Sky View Post
    Yes, they are called "rotor spacers" or "shims"
    Keep in mind you will have to space the caliper too.
    Pics would help us be more specific.
    Why would I have to caliper too if I just move the rotor out?
    Click image for larger version. 

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    Why would I have to caliper too if I just move the rotor out?
    Your purpose in moving the rotor out is to permit the inboard side of the caliper, which currently hits your spokes, to be moved away from those spokes.

    Place the caliper over the rotor and this will be obvious.

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    Oh yes, the caliper will move with the rotor

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    You got it!
    A rigid mount caliper is less forgiving than a floater.
    If rigid, keep the rotor centered so the pucks can push out evenly.

    If a floater, shim it out the same distance as the difference between the new hub plus shimmed roter and the original hub rotor.

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    Quote Originally Posted by Sky View Post
    You got it!
    A rigid mount caliper is less forgiving than a floater.
    If rigid, keep the rotor centered so the pucks can push out evenly.

    If a floater, shim it out the same distance as the difference between the new hub plus shimmed roter and the original hub rotor.
    I assume on a springer it would be a floating caliper and on a stock Harley where the caliper is mounted to the front leg it would be rigid? This is my first build, so I just want to clarify. So I noticed that there is also a lot of play between the fork and the hub, I'd assume that I'd want to make the arm that comes off the fork as straight forward as possible and not angles at all?

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    Quote Originally Posted by Spartagus981 View Post
    I assume on a springer it would be a floating caliper and on a stock Harley where the caliper is mounted to the front leg it would be rigid?

    No sir, you can have rigid or floating caliper on either front end.... It's the design of the caliper that makes the difference....

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    Quote Originally Posted by Tattooo View Post
    No sir, you can have rigid or floating caliper on either front end.... It's the design of the caliper that makes the difference....
    How can you tell? What is the difference?

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    Quote Originally Posted by Spartagus981 View Post
    How can you tell? What is the difference?
    maybe this:

    ..."Sliding Caliper serves the same purpose as Fixed Brake Calipers. The main difference between the floating and fixed brake calipers is the mounting, one isn’t solidly mounted and the other is...Floating type Disc Calipers the bracket is solidly mounted enabling it to slide left and right with the help of pins and bushings on the bracket...Fixed calipers setup consists of pistons on both sides of the brake pads, you can learn more about Fixed Brake Calipers in detail here..."
    https://www.bikesmedia.in/reviews/mo...-calipers.html

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    would it be alright to put a pulley spacer between the hub and disc (with the use of loner bolts of course) to move the rotor to the right which would allow the caliper to clear?

    Something like this: https://www.jpcycles.com/product/213...-pulley-spacer

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    Quote Originally Posted by Spartagus981 View Post
    How can you tell? What is the difference?
    I just know....

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    Quote Originally Posted by Spartagus981 View Post
    would it be alright to put a pulley spacer between the hub and disc (with the use of loner bolts of course) to move the rotor to the right which would allow the caliper to clear?

    NO...... What do you have against doing it right???

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    Quote Originally Posted by Tattooo View Post
    NO...... What do you have against doing it right???
    I am trying to figure out the right way. I sent you a message

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    Quote Originally Posted by Spartagus981 View Post
    I am trying to figure out the right way. I sent you a message
    Got ya, For some reason my PM isn't working.....

    The first thing you need to do is get your bike off the ground..... Get your wheel centered where it will be from now on.... Then see where the caliper needs to be compared to the rotor...... Then go from there..... Don't buy anything until you know what you need..... And you don't know what you need until you start measuring....

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    Quote Originally Posted by Tattooo View Post
    Got ya, For some reason my PM isn't working.....

    The first thing you need to do is get your bike off the ground..... Get your wheel centered where it will be from now on.... Then see where the caliper needs to be compared to the rotor...... Then go from there..... Don't buy anything until you know what you need..... And you don't know what you need until you start measuring....
    the turnbuckle from the caliper is supposed to be parallel with the wheel, correct?

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    because I called the company I ordered the springer from, and after talking to them, you guys, and doing research all day I think that the wheel I have I am trying to use for the wrong application. Even if I space the rotor our from the hub the turnbuckle linkage is still not going to be parallel.

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    The linkage doesn't need to be dead parallel to the centerline of the bike. It's a torque arm which doesn't align anything.

    Rotor/pulley spacers are commonly used on mid-glide conversions etc. It's just another slice of meat in the sandwich. I red Loctite the mounting bolts either way.

    Sketches can help you picture the forces and directions involved.

    Post some photos for fucks sake. If anyone here were telepathic we'd be rich and doing something else like ruling the world.

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    Kinda like to see photos of the caliper..
    If it's after/market, some can be had with swallow backs to clear the spokes...

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    Quote Originally Posted by farmall View Post
    The linkage doesn't need to be dead parallel to the centerline of the bike. It's a torque arm which doesn't align anything.

    Rotor/pulley spacers are commonly used on mid-glide conversions etc. It's just another slice of meat in the sandwich. I red Loctite the mounting bolts either way.

    Sketches can help you picture the forces and directions involved.

    Post some photos for fucks sake. If anyone here were telepathic we'd be rich and doing something else like ruling the world.
    I will post some photos either later tonight or tomorrow. Im so puzzeled now.

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