1200 wheel mod for safe car tire mounting

[brianinpa]

That's why I asked Joe. I was sure nothing was being removed from the side wall of the rim, but I wanted to make sure.

 

[Omega Man]

:doh: Once again Omega doesn't know his ass from a hot rock! Doesn't look like much was taken off just like you said.

~O~

 

[AApple]

I fully unnerstand WHAT you did, but would still like to see a comparison between a stock rim, and the modded rim. I think the visual would be a great help to all of us. I know there is a "hump" on the rim just inside of where the tire seats against the rim, and that's what you flattened out, or ground down, but a visual comparo would be sweet. :yes: :good:

 

[joedrum]

thats what we do here we all get better ...me too ..in many ways not so obvious like a bike mod....from the pics i hope everyone can tell this was a eduring touch deal ..it is always tempting to wussy out and use force ...truth is touch takes much more strength and skill ...as i was doing this like ice skating ..keeping the grinder on perfect hold while moving to cover wheel evenly ...no easy deal ..it takes not much time for stupid hands and a powerful grinder at 10,000 rpm to ruin a wheel...dont ever think this is easy ...you have to bring the best you have ..and as soon as it seems your staggering got to stop right then ..me personally ..i know me ..i put this wheel up against any machine shop wheel that was done ...this is all just rough milled ...it actually just what i wanted ..like honing in a cylinder there is lines that lines that will cut into tire bead and really hold it ..better than some bead bump on a rim like this that is hand machine so well ..you can almost bead the tire on rim with bicycle hand pump...not tryin to put a feather in my cap ..just wanting everyone to know this rim is no second grade ..backyard wheel deal ..if one wanted to it could go from here to like a mirror ..but that wouls just lessen it as far as tire duty goes... :builder: :thanks:

yes pics of the stock wheel would have been nice

 

[slabghost]

Okay here's what they look like stock.

gl1200 rear wheel

• slabghost
• Sep 3, 2015

Stock 1200 rear wheel showing bead lock.

 

[joedrum]

ok the picture blows up good ...it has a huge hump...first try was to take this out and smooth the ramp..tire would not even get to where the hump was ..wow...so i got on taking more out all the way to ...inside of outside edge you dont have to get square in corner ..tire bead is rounded or chamfered there....well it went on ..5 or 6 times before tire slowly got all the way to the rim edge ...while this is going on i never cut where tire had been easy so to speak ...the last part was the inside outer edge that i was working on ...once tire beaded that was it till i broke it down yesterday...cleaned it, did a little wire brusch clean ,pics,stem and back on ...it beaded great like it was already beaded ...by 35lbs it was done...pic brings a lot to the story thank V :mrgreen:

 

[brianinpa]

I like to compare apples to apples, and I have to have my shoes off to count to 20, so...

This is what you took off?

 

[joedrum]

yes brian that came all the way out ..and then a bunch more so to speak and from there to the outer edge too..this was where the last battles were right there ..close work to the inside edge ...

to do the method i use you need one thing for sure ...the tire you want to put on ...no other measeauring tool required...if i needed those tools there would be no thread here :smilie_happy:

 

[brianinpa]

So then...

Before:

After:

It isn't the same wheel, but it is the same view and that is what was throwing me off.

 

[dan filipi]

What is different about the car tire that wouldn't let it go past that hump, whereas the bike tire will?

 

[slabghost]

car tire bead is bigger.

 

[dan filipi]

slabghost » 2 minutes ago[/url]":2jevrpl8]
car tire bead is bigger.

Which way, wider at the bead?

 

[backlander]

Dan, a car tire is designed for a rim that actually measures 14.968. A Motorcycle tire is designed for a rim that actually measures 15.080. A difference of .112 That's not much until you start to stretch that tire over it, add the bead lock on the inside of the rim like joe removed and it becomes a bear.

 

[joedrum]

dan filipi » Thu Sep 03, 2015 4:10 pm[/url]":17bq5ui2]
What is different about the car tire that wouldn't let it go past that hump, whereas the bike tire will?

plain and simple smaller round if your talking the goossip on internet when hump is considered ..the 2/1000" bs is just that ...but there is really nothing structural that comes off ..people that have fiilled the rims with enough air to bead car tires to these stock 1200 wheels have 100% dumb hands....

 

[dan filipi]

backlander » 5 minutes ago[/url]":33dknifu]
Dan, a car tire is designed for a rim that actually measures 14.968. A Motorcycle tire is designed for a rim that actually measures 15.080. A difference of .112 That's not much until you start to stretch that tire over it, add the bead lock on the inside of the rim like joe removed and it becomes a bear.

Now that makes sense.
Just asking because I don't remember reading why exactly the bump needed to come off but you answered it good.

 

[backlander]

As I see it, the only proper way is to do it like joe did, mill the wheel to fit a 15 inch car tire, forcing a tire to bead with gobs of grease and 125 lbs of air pressure to me is weakening the tire and asking for trouble, like others have done on other forums, I don't advocate doing things that way. If proper air pressure is maintained on the car tire and milled motorcycle rim there should not be a problem in my opinion.

 

[dan filipi]

backlander » 1 minute ago[/url]":3uw301sm]
As I see it, the only proper way is to do it like joe did, mill the wheel to fit a 15 inch car tire, forcing a tire to bead with gobs of grease and 125 lbs of air pressure to me is weakening the tire and asking for trouble, like others have done on other forums, I don't advocate doing things that way. If proper air pressure is maintained on the car tire and milled motorcycle rim there should not be a problem in my opinion.

I agree Mike, my only concern is during a blowout at speed with no bead lock. But then I haven't looked at other model wheels to see if they have a bead lock.
I'm definitely not trying to discount the mod, just trying to understand and make everything aware to others.

 

[backlander]

Safety first, I agree, I have heard that this bead lock, rim/tire diameter size differential only occurs on the 15 inch size and not the 16 inch size like on the 1500 bikes. Would love to have that confirmed by a 1500 owner.

 

[Ansimp]

+1 on the bead lock stopping the tire from flapping on the rim as much during a rapid deflation. Car tire should be firmer/stiffer than MC tire so hopefully this isn't an issue.

 

[joedrum]

as stated rough milled like i did it .. is actually better bead lock ...unless the tire breaks bead in tire ..the rest of the tire can decinrgrate ..the bead will be in place on this wheel ..its all hold ..not show a bead bump that it pops right over to begin with when mounted ..to me its a cure for sloppy wheel ...tolerences that really do come off fast