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Makotosun

Tube nuts

  • mdscott
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Tube nuts was created by mdscott

Where to put tube nuts when changing a tire or tubes was alway debatable. I recently read info from Michelin tire company.

this will stir up the pot.

"The conical washer sits over the inner tube valve stem and should follow the contour of the valve so that the convex side sits against the wheel rim when fitting.

Once fitted to the wheel the two lock nuts sit on the valve cap side of the wheel rim. After fitment and inflation to the correct pressure, the two nuts should be backed up towards the valve cap, and locked against each other.

This is not usually an issue on correctly inflated road going tyres, but should there be any slippage of tyre on the rim, during heavy braking or acceleration for example, the inner tube could be pulled around slightly with the tyre and if the inner tube is bolted to the rim the valve can be ripped out. If the lock nuts are raised 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."

Thanks Mark
Roseville, Ca.

'03 ST1300
'75 Norton
'73 CB500K
'81 Honda CT110
'87 PW50
'64 McClane Edger
'02 Honda XR70R
The following user(s) Liked this Post: MarkT, 1971DT250, Steve F, Dirtboy, JayB, YamahaForumUsername
18 Oct 2020 10:45 #1

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Replied by Pedalcrazy on topic Tube nuts

I've heard that but being new to the enduro world and being a little anal...I put a nut on each side and tighten it down. I do make sure the bead locks are installed correctly and tight. No problems yet!
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
1968 DT1 (3)
18 Oct 2020 11:16 #2

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Replied by mdscott on topic Tube nuts


i have also with no problems. tires usually dont slip, especially with rim locks. At least with this method you'll know if it does.
Thanks Mark
Roseville, Ca.

'03 ST1300
'75 Norton
'73 CB500K
'81 Honda CT110
'87 PW50
'64 McClane Edger
'02 Honda XR70R
18 Oct 2020 11:31 #3

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Replied by MarkT on topic Tube nuts

The lower nut is usually tight against the washer on a new tube so I always left it that way. Was never sure if it was there to help hold the stem in the tube or something. First time I ever heard that both nuts belong outside the wheel. Makes sense though.

I don't tighten the other nut against the outside of the wheel other than during initial inflation... I use it as a "lock nut" for the valve cap. Been doing that forever. Learned to do it that way when I was a kid probably either from Mike Patrick or Malcolm Smith's shop...
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
18 Oct 2020 12:08 #4

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Replied by t-bone on topic Tube nuts


This is how I do it. Since my ct1 doesn’t have rim locks and tire pressure is lower when off road I’ve straighten the valve stem often. No washer is used.
My 2 cents.
The following user(s) Liked this Post: Rick C., MarkT, 1971DT250
18 Oct 2020 14:01 #5

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