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HIGH MILAGE TYRES.

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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 10 Dec 2020 at 18:39
In the end each of us must place our nuts where we feel the most comfortable
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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nab301 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2020 at 18:26
Originally posted by Dave P. Dave P. wrote:

In the end each of us must place our nuts where we feel the most comfortable

Indeed!  Without trying to  to create a train wreck of  a  thread,  was the bike within the recommended load parameters of the tyres ?  I ask because i'm assuming the punctures you had were in the stem area?    Maybe I'm just set in my ways , I've taken the 50/ 50 approach  purely for research purposes after replacing my rear tyre. Up till now though  I've only ever had nail in the tyre type punctures.

Nigel
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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2020 at 18:44
Yes the bike was well within the load parameters. Both it (850GT) and the V7 Special have done similar trips loaded in the same way.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec 2020 at 08:16
Many punctures are due to the high number of self tapping screws used on vehicles now . As an Ogri cartoon once explained "Norman the nail" sits in wait to get flicked up by front tyre to embed himself in the rear one ....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec 2020 at 10:22
Originally posted by Dave P. Dave P. wrote:



For me this says it all regarding tube fitting.The steel washer at the base of the valve stem is shaped to fit into the rim well.This it cannot do if a nut is placed over the top of it. Putting a nut inside the rim is not only dangerous but potentially lethal.
The picture is from a Michelin website.It can be seen that the lower nut is not tightened against the rim (as I always used to do )but the two nuts are locked together leaving a gap between nut and rim allowing for slight misalignment or to show if tyre creep has occurred.

Steps off soap box to make tea.


Sammy Miller always used to recommend running the nut up to the cap and locking it there to show any tyre creep.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jmee54 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec 2020 at 16:52
This has got me a little concerned now. I can't remember how I fitted my tubes and confess I have never thought about the possible consequences. Why would a manufacturer tighten the first nut to the inner tube, surely this will encourage the wrong fitment for those like me who have never given it any thought?

I will have a look tomorrow with fingers well and truly crossed as fitting my tyres was a pig of a job.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec 2020 at 16:56
Originally posted by jmee54 jmee54 wrote:

This has got me a little concerned now. I can't remember how I fitted my tubes and confess I have never thought about the possible consequences. Why would a manufacturer tighten the first nut to the inner tube, surely this will encourage the wrong fitment for those like me who have never given it any thought?

I will have a look tomorrow with fingers well and truly crossed as fitting my tyres was a pig of a job.



I've wondered about that too. It makes no sense to me.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Doc. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Doc. Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec 2020 at 17:38
If the Nuts aren't tightened against the Rim, then there's no reason to have them there at all, just bin them.
Tyre 'creep' could easily be checked by a few dabs of Paint on the Rim & Tyre, but be honest, how many running with Tubes, with 'loose' Valve Stems, actually check them?

You'd have to check them every single time you'd accelerated or braked hard to be totally 'safe'.

As for high mileage, can you get any Dual Compound Tyres in the size(s) you need Dave P?

Doc out!

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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec 2020 at 22:22
Tyre creep CAN be gradual so keeping an eye on the valve stem CAN be beneficial. Depending , obviously, on how often you look.
I learned this lesson the hard way when the valve pulled out of the rear tyre of my RE Bullet whilst in Turkey, and I ended up riding home with two cracked ribs and a selection of multi coloured bruises. Not recommended !!
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ItieNut Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 2020 at 19:53
This thread has got me thinking.
The more I read it the more I convinced my self I fit both nuts to the out side of the rim.

Just been out to check as I have 5 bikes with tubes not all have been fitted by me some by bike shops when I'v been to lazy to do it myself.

All ten wheels have been done the same washer,nut,rim,nut.
I have never had an issue other then nails causing punctures and one valve stick to a rusty rim
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jan 2021 at 20:13
I pulled out my Enfield today , and rode off (unusually for me without checking the tyre pressures ) thinking, "the front tyre feels soft"  , so returned and checked  it  , only 10psi.... and the tyre had slipped on the rim,  the rear was fine.   I'm putting my nut back on!!
  
Nigel
Keep smiling , it makes people wonder what you've been up to!
'19 CB125F,

'18 DL250 SUZUKI V STROM,'99 Bmw R1100S, '03Bullet 65 500, '93 MZ301 Saxon fun (offroad)
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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jan 2021 at 20:38
Originally posted by nab301 nab301 wrote:

I pulled out my Enfield today , and rode off (unusually for me without checking the tyre pressures ) thinking, "the front tyre feels soft"  , so returned and checked  it  , only 10psi.... and the tyre had slipped on the rim,  the rear was fine.   I'm putting my nut back on!!
  



Which nut are you putting back, the inside one or the outside one?
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jan 2021 at 21:27
This is direct from Michelin. Mike H pointed it out a while back.

The inner tube is installed with the conical washer sitting between the inner tube and wheel rim. On a road bike the first lock nut should then be run down to lightly touch the rim, and then backed off by half a turn.   The second lock nut is run down until it meets the first one, then the two nuts should be locked together by using spanners to rotate them in opposite directions.

For off road inner tubes being used at low tyre pressures there is a possibility of tyre creep, and the inner tube could be pulled around slightly with the tyre. If the inner tube is bolted to the rim the valve can be ripped out. If the lock nuts are raised further towards the valve cap then inner tube has some leeway to move before this happens. Any movement is thus obvious as the valve stem will no longer be straight and pointing at the centre of the hub, but will be pulled round at an angle by the tyre and can then be seen and corrected."

I shall say no more!
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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nab301 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jan 2021 at 21:32
Originally posted by Dave P. Dave P. wrote:

Originally posted by nab301 nab301 wrote:

   


Which nut are you putting back, the inside one or the outside one?

I never use the outside one  .....  I'll remove the tyre and see whats's what, but I meant I was replacing the inner nut !  I've never had a tyre slip before though , maybe the disc brake  produces more torque  than the engine ...  ( front tyre that slipped ) or  presumably it was just the low pressure that allowed it to.

Nigel
Keep smiling , it makes people wonder what you've been up to!
'19 CB125F,

'18 DL250 SUZUKI V STROM,'99 Bmw R1100S, '03Bullet 65 500, '93 MZ301 Saxon fun (offroad)
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