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Difficulty fitting tyres on "snowflakes."

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ReggieV View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ReggieV Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 09:53
This thread has been very interesting for me.
I now know;
The wheels should be run with tubes in.
The tyres are a b***ard to get to seat for nearly everybody including experienced tyre fitters without 100 psi +, mainly due to modern tyre construction.
My local tyre shop are not total incompetents, but erroneously thought they were ok without tubes.
This style of cast wheel is not known as a "snowflake." Embarrassed
 
Thanks everybody.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote theone&onlymin Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 10:08
Just back,100psi to seat.
Put the wheel in.
Ooooo that's a bit snug on the mudguard.
They'd put a 110/90 on instead of the 100/90 I had ordered.



Ah well it's on now. Could be weird but I'm only commuting for next 6 months. New tyre for Scotland in June anyway.

Cheers
Min
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ianboydsnr Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 12:41
Originally posted by ReggieV ReggieV wrote:


This thread has been very interesting for me.
I now know;
The wheels should be run with tubes in.
The tyres are a b***ard to get to seat for nearly everybody including experienced tyre fitters without 100 psi +, mainly due to modern tyre construction.
My local tyre shop are not total incompetents, but erroneously thought they were ok without tubes.
This style of cast wheel is not known as a "snowflake." Embarrassed
 
Thanks everybody.


To be fair I have run them with and without tubes, mainly without because the tube has burst pumping it up to 90psi, and I hadn't a spare, the reason they are supposedly tubed is because they don't have a retaining bead to stop the tyre rolling off if the tyre pressure is low, but they are that hard to get on it's not very likely to roll off easily, and it can happen with tubed tyres anyway,

Insurance wise, it's about as bad as using a tube in a tubeless tyre.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dukedesmo Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 13:56
Originally posted by Ianboydsnr Ianboydsnr wrote:

 but they are that hard to get on it's not very likely to roll off easily

Definitely an understatement.  LOL

I found them much harder to even bread the bead than on a tubeless never mind remove. I reckon they'd be fine without a tube, assuming they are airtight?
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ReggieV View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ReggieV Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 14:13
I did originally run my other Guzzi with this style of wheel on without a tube in after taking advice from the chosen tyre fitters, but after a year or so it wouldn't maintain a seal and always needed blowing up, so then I had tubes put in, and the tyre fitters had a real job not getting the tube trapped and it turned out that on one wheel the tube was twisted, and then this caused it to rub on the raised "lump" and again (several months later) I was getting tyres going flat in a matter of days.
Basically I've had quite a few problems with this type of wheel hence why I asked the question.
 
But now I am wise, and know all of the nuances with regard to these wheels. LOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 14:42
Originally posted by Ianboydsnr Ianboydsnr wrote:

.....the reason they are supposedly tubed is because they don't have a retaining bead to stop the tyre rolling off if the tyre pressure is low, but they are that hard to get on it's not very likely to roll off easily, and it can happen with tubed tyres anyway,


Yes, I've never understood this argument against using tubeless rather than tubed tyres. As if the tube would do anything to stop the tyre coming off the rim.....


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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 18:33
Originally posted by theone&onlymin theone&onlymin wrote:

Just back,100psi to seat.
Put the wheel in.
Ooooo that's a bit snug on the mudguard.
They'd put a 110/90 on instead of the 100/90 I had ordered.



Ah well it's on now. Could be weird but I'm only commuting for next 6 months. New tyre for Scotland in June anyway.

Cheers
Min
Hope you enjoy the change in handling. Ouch
 
When I got my SPIII it had a 110/90 on the front and a 120/90 on the back.
It handled like a pig, I began to wonder why I had bought it. At low speeds on corners I had to push very hard on the inside bar to stop the bike falling over, and at higher speeds it seemed to choose it's own line.
Did a bit of searching the specs, and ended up fitting a 100/90 instead. The bike was transformed, far better in every way, it was a real pleasure to ride.
Brian.

Better 5 minutes late in this world than years early in the next.
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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 18:34
Ah yes “snowflake” for BMW R series cast wheels because the spokes make that kind of pattern.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Exmoorbeast Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2018 at 11:47
To get a tyre to seat ,inflate quickly with the valve core removed- the lack of obstruction gives the inflating carcass momentum to pop into the bead seat . Once it has seated, deflate and refit valve core & reinflate to correct pressure.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ReggieV Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2018 at 12:46
A good tip, thanks. Thumbs Up
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2018 at 15:35
Originally posted by ReggieV ReggieV wrote:


A good tip, thanks. Thumbs Up
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2018 at 17:33
That assumes you have a proper compressor of course.
Brian.

Better 5 minutes late in this world than years early in the next.
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