The Murphy Builders Site

Hi Jesse,
Yes I think you should be concerned about only 1/16" clearance, tires
flex from taxi, landings, or low air pressure. I expect that I will
have the same problem with my JDM wheels and 8.50 tires. Also mine are
not drilled for the tubes that I have with the straight stems.
Please keep us posted on your results.

Dick Wampach SR-108

-----Original Message-----
From: On Behalf Of Jesse Jenks
Subject: [rebel-builders] Brake caliper clearance

Now I am worried about the calipers gouging the tires. I only have about
1/16 clearance. Is that sufficient, or do I need to change something?
Can you add a washer or two between the brake rotors and the spacer?
That would probably do the trick. Else I can take the caliper over to
the belt sander and have at it. I also thought about asking MAM for a
slightly thicker spacer, as it is cut from the same extrusion as the
wheel center piece. If none of those ideas work out, I could make a thin
spacer to go in there. Washers would be the easiest though.
Thanks
Jesse

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Hi Jesse !

1/16" is definitely not enough to allow for expansion.
Don't think grinding the caliper would be good ...

There should be no problem getting a thicker spacer
from Murphy - they can cut to whatever measurement you
give them. That might be safer than washers, as the load
will be transferred all around ...

--
......bobp
beep@prosumers.ca
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 29 November 2007 22:02, Jesse Jenks wrote:

I finally worked out the inner tube problem for my 8.50 tires on JDM
wheels. I didn't want to use the cheap 8.00 tubes, because I ran into a guy
on the web who did that on his CH 801 and had a rash of blowouts. Anyway
Alaska Bushwheels sold me the proper valve stems, and I made a Frankentube
out of my aircraft 8.50 tubes. It seems to be working well, although I
still had to modify the wheels slightly. Now I am worried about the
calipers gouging the tires. I only have about 1/16 clearance. Is that
sufficient, or do I need to change something? Can you add a washer or two
between the brake rotors and the spacer? That would probably do the trick.
Else I can take the caliper over to the belt sander and have at it. I also
thought about asking MAM for a slightly thicker spacer, as it is cut from
the same extrusion as the wheel center piece. If none of those ideas work
out, I could make a thin spacer to go in there. Washers would be the
easiest though. Thanks
Jesse

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Ok thanks Bob,
I will pursue that. What sounds like a safe gap ? 3/16"? At some point I will have to find longer through bolts which might be a real pain, or counter bore the front holes. It looks looks like it is good for another 1/8" without doing that. That would be using a thin washer under the bolts, and locktite on the nuts cus there wouldn't be much thread in the plastic stopper part.
Dick, I can give you more details of my tube/valve escapade if you want. It came out pretty good I think. If I had to do it over though I would wait for AK Bushwheels to come out with their 8.50s cus they are tubeless, and the valve stem is in the tire sidewall. It doesn't go through the wheel.
Jesse

From: beep@sympatico.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Brake caliper clearance
Date: Fri, 30 Nov 2007 03:34:43 +0000



Hi Jesse !

1/16" is definitely not enough to allow for expansion.
Don't think grinding the caliper would be good ...

There should be no problem getting a thicker spacer
from Murphy - they can cut to whatever measurement you
give them. That might be safer than washers, as the load
will be transferred all around ...

--
......bobp
beep@prosumers.ca
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 29 November 2007 22:02, Jesse Jenks wrote:

I finally worked out the inner tube problem for my 8.50 tires on JDM
wheels. I didn't want to use the cheap 8.00 tubes, because I ran into a guy
on the web who did that on his CH 801 and had a rash of blowouts. Anyway
Alaska Bushwheels sold me the proper valve stems, and I made a Frankentube
out of my aircraft 8.50 tubes. It seems to be working well, although I
still had to modify the wheels slightly. Now I am worried about the
calipers gouging the tires. I only have about 1/16 clearance. Is that
sufficient, or do I need to change something? Can you add a washer or two
between the brake rotors and the spacer? That would probably do the trick.
Else I can take the caliper over to the belt sander and have at it. I also
thought about asking MAM for a slightly thicker spacer, as it is cut from
the same extrusion as the wheel center piece. If none of those ideas work
out, I could make a thin spacer to go in there. Washers would be the
easiest though. Thanks
Jesse

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