The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Air4Life on July 09, 2012, 05:52:47 PM
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Fly Racing Heavy Duty Tube
Size- 3.50/4.00-18
Shinko 712 Rear Tire
Size- 110/90H-18
The issue I am up against (see tire image) is that the rim is not seating evenly. This tube went in and made no suggestion of being twisted. Its a bit on the small size, in my opinion.
I spoke with online support and tomorrow will try the ratchet strap -around the tire while inflating. He said that shinko's seem to have
this issue...
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Use some Ivory soap and water for a lubricate. Or go to an auto parts house and get some tire lube.
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Like Don said, get some sort of lubricant, deflate the tire, break the tire away from the wheel, lube it up and reinflate it .
Don't use grease or oil, not real kind to rubber .
You may also need to go to a higher pressure to get the tire to seat properly, 30-35 psi may not get the job done .
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Hey, thanks for the quick replies.
I used this stuff: Matrix Concepts 1.7 Formula 8 Tire Mounting Lube
It went on the rim without to much trouble with 3 spoons, especially when I used the foot on the opposite end to keep it in the deepest part of the well.
Here's a pic with the strap that hasn't made the slightest difference.
I will lube it again.
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I'm getting close to the point of breaking open my wallet...
I broke the bead on both sides and sprayed liberally. Same appearance as above.
I went to 55 psi. Its not a rush of air by any means, being a 3 gallon portable job.
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I don't like to tell anyone to grossly overinflate a tire, but on my last rear tire change on my '81 R65, they had to use 110 psi to get it to seat .
I wasn't real comfortable being around the area, when this was done .
:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o
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Not me brother, I'd need a tire cage of some sort for that.
Do you think if there was a pinched tube, as in a leak, it would lead to consistent seating problems in its vicinity?
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I have had to go as much as 60 psi on some of the tires I have mounting on my BMW's. On brand of tire I mount on the Honda I had our air compressor at work would not infate it at all. Had to use a nitrogen bottle and had to be quick on shutting the flow off. I have use a tire like a basketball to help seat the bead.
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I'd pump it up to 60 PSI or so, especially if you don't have a compressor that can ramp up the pressure quickly. Then leave it in a safe place for a few hours, maybe in the sunshine - it may eventually "pop".
Tires with stiff beads can really have this problem when they've been left on their side for a long time (beads sag together under gravity). IF you buy tires in advance and have them in storage, be sure to keep them vertical and/or make some cardboard spacers to stick inside the tires to keep the beads apart in their more normal mounted spread..
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I had the local yamaha/ktm dealer, Malcom Smith's here in Riverside seat my 712's . I couldn't get'r done at home.
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The tyre fitters I have seen work remove the valve to get more air in quicker untill the bead pops.
Once the tyre is seated properly you can then install the valve and reinflate to running pressure.
It may take a lot of pressure, 100psi would be unlikely to hurt anything imho.
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It went improperly seated after being left Overnight @ 65 psi
This morning another complete deflate (4 total) and pump up to 65 psi did the trick. Pop Pop Seat Seat, oh what a relief it is.
Thanks for supporting me. :)