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Old 01-25-2015, 10:57 AM   #1
treetrimmer OP
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Can't seem to get new Michelins to bead on snowflake rims(?)

I bought a set of new Michelin Pilot Activs for my R100rs on the advice of this board and the rear seriously does not want to bead on the rim. The dealer blew up one new tube trying to bead it the last part of the way, I went out and got a stronger HD tube that has accepted close to 60 lbs without blowing but tire still will not bead completely. I've tried hearing the tire with a heat gun, obviously I've lubed the shit out of it with different things, what gives??

A good friend and very experienced BMW tech told me that those tires are a bitch to mount on snow flakes. Now they tell me. I never would have bought them. The size of rear tire is 4.00x18, stock size on stock rim. Any advice based on actual experience appreciated.
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Old 01-25-2015, 11:00 AM   #2
Kt-88
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I'm assuming you've overlubed and bounced the mounted, inflated tire and rim to try and knock it on? On exceptionally low pro tires (for cars, mind you, so take with grain of salt) we would use a ratchet strap in the center of the tire all the way around it, then tighten it down with air in it. This squishes out the sidewalls and was necessary for 45r/20 tires (or lower) most of the time.
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Old 01-25-2015, 11:35 AM   #3
treetrimmer OP
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The ratchet strap is a great idea, I did try bouncing the inflated tire with no luck at all. I was bouncing it like a basketball on a cement floor. Thanks.
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Old 01-25-2015, 12:01 PM   #4
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clean the rims beading area with a scotchbright pad, I have an airnozzle with a elbow fitting so I can rapidly air the tire, valve core out, sometimes some rapid airing-deairing cycles can do the trick..having the tires warm can help.. put tire in a clear plastic bag in the sun..box with heater.. tire mounting lube can help..
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Old 01-25-2015, 12:47 PM   #5
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Blimey I mounted conti Go tyres to my guzzi on Friday,



It had come down from the 90 it got to!
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Old 01-25-2015, 01:47 PM   #6
treetrimmer OP
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That would not go well with tubes.
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Old 01-25-2015, 02:21 PM   #7
100RT
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I had the same problem with my 81 RT snowflakes and those tires. Lots of real tire lube was needed.
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Old 01-25-2015, 05:37 PM   #8
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The 4.00x18 Pilot Activs are even difficult to put on a spoked wheel, but worth the effort. As stated above, cleaning the bead wells is important - make 'em shine. And proper labelled tyre lube makes a difference. I have heard that the ratchet strap around the circumference trick can really help, though haven't had to resort to that yet.
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Old 01-26-2015, 12:48 AM   #9
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I've found 100 psi still won't get a pilot activ rear to seat, when it's playing hard to get. 60 psi won't cut it.

As mentioned above, clean wheel, good tyre lube and take the valve out. The ratchet strap idea will get a run next time I change tyres.

Not a good tyre for a roadside repair, if there's a tube involved.
But other than that, It's prolly the best road rear in a 4:00
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Old 01-26-2015, 01:00 AM   #10
GooseGrease
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Yep, very stiff sidewall and they don't like Guzzi snowflake rims either.

If you need to really over inflate the tube to get it to seat then replace the tube. Once you have defeated them they are more submissive.

Probably a bad time of year for you. I make sure the tyre place throws the thing out into the sun for an hour or two before I get there. You could try warming the tyre inside or with a heat gun.

I like them but they aren't perfect in the wet. A BT45 or Pirelli Sport Demon will out grip them there.

Have fun.
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Old 01-26-2015, 02:15 AM   #11
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Quote:
Originally Posted by GooseGrease View Post

If you need to really over inflate the tube to get it to seat then replace the tube.
After the tyre is seated? How does that work?

I'm going back to tubeless pilot activ rear. Just got to find a top quality right angle tubeless valve.
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Old 01-26-2015, 03:41 AM   #12
ianboydsnr
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Quote:
Originally Posted by treetrimmer View Post
That would not go well with tubes.
That was with tubes, a new continental tube to be precise!



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Old 01-26-2015, 03:52 AM   #13
190e
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Quote:
Originally Posted by GooseGrease View Post
Yep, very stiff sidewall and they don't like Guzzi snowflake rims either.
Is this one of the reasons these tires are thought to handle so well ?

Back when these bikes were new there used to a commonly held view that they were very fussy about tire choice. It was said that to handle well they needed tires with stiff side walls to make up for a degree of flexibility in the frame.
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Old 01-29-2015, 08:07 AM   #14
treetrimmer OP
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Just a postscript; I got the tire to bead through repeated rapid inflation but the final charm was to unbead it completely a couple of times in between and let it re-bead, so to speak. It was continually not beading in the same spot so unbead ing it allowed it to catch on the far side first once and that did the trick. It took about 70-80 psi with a good HD new tube.

I actually dismounted the tire again yesterday in order to rotate it on the rim, I was having a balancing problem, (needing way too much weight), and it beaded with a lot less drama the second time around.

Thanks as always for all the help! :)
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Old 01-29-2015, 08:21 AM   #15
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Michelin must have addressed the problem because my Pilot Activ front tire seated at 20 lbs. Of course it is leaking from the entire bead circumference, but it seated easily.
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