The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Buying Tyres for a Rapide
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Jonathan Lambley" data-source="post: 122433" data-attributes="member: 3108"><p>Peter,</p><p>I did a bit more digging. I have contacted an Andy James, Operational Marketing Manager (Motorcycle & Scooter Products) at Michelin Tyre PLC. He initially said there was no real benefit to using thicker inner-tubes in order to prevent punctures but then I pointed out that I've fitted them to prevent punctures around the valve. He did say UHD tubes are not suitable for modern bikes ridden at sustained high speed useage but okey for older machines. This was his final reply, which i think is interesting.</p><p>Maybe the jury might still be out but I'm going to see how this UHD tube performs.</p><p>Cheers Jon</p><p>**************************************************************************************************************</p><p>Morning Jon,</p><p>Thanks for providing the additional information. A Michelin UHD tube on older lower performance machines won’t cause any problems at all in use. We should be looking at why inner tubes are failing though and remedy the cause not the symptoms. Splitting and tearing around the valve is usually down to corrosion or roughness in and around the valve hole in the wheel rim. Often this leads to an enlarging of the hole which allows excessive movement of the valve and subsequent wear. This can be remedied by sleeving the rim hole, and a flexible plastic washer could be used between the tube and rim. This enlargement and roughening of the area can often be in part due to incorrect fitment of the inner tube locknuts. It is very common to see one of the 2 locknuts fitted inside the wheel rim, bolting down the conical washer which is shaped to sit nicely directly against the rim and inner tube. The 1st lock nut should be run down to lightly touch the wheel rim, and then be backed off by half a turn and then the 2nd lock nut run down and the two tightened together before adding the valve cap. Locking the tube to the rim is not recommended, some leeway in this area is welcome so the tube and valve can flex naturally without restraint, hence backing off the lock nuts from being tight against the rim. Splits in the valve area can also be down to ageing of the inner tube - how old is it? Inner tubes should be changed at every tyre change, and on lower mileage vehicles we recommend for safety that tyres and inner tubes are changed at 10 years old regardless of tread wear. The valve hole can also allow contaminants in which can cause the valve to corrode. Having the lock-nuts very close to the wheel rim can help to avoid this, as can using a small amount of silicon sealer or grease on assembly.</p><p>Best regards, Andy JAMES</p><p>*****************************************************************************************************************</p></blockquote><p></p>
[QUOTE="Jonathan Lambley, post: 122433, member: 3108"] Peter, I did a bit more digging. I have contacted an Andy James, Operational Marketing Manager (Motorcycle & Scooter Products) at Michelin Tyre PLC. He initially said there was no real benefit to using thicker inner-tubes in order to prevent punctures but then I pointed out that I've fitted them to prevent punctures around the valve. He did say UHD tubes are not suitable for modern bikes ridden at sustained high speed useage but okey for older machines. This was his final reply, which i think is interesting. Maybe the jury might still be out but I'm going to see how this UHD tube performs. Cheers Jon ************************************************************************************************************** Morning Jon, Thanks for providing the additional information. A Michelin UHD tube on older lower performance machines won’t cause any problems at all in use. We should be looking at why inner tubes are failing though and remedy the cause not the symptoms. Splitting and tearing around the valve is usually down to corrosion or roughness in and around the valve hole in the wheel rim. Often this leads to an enlarging of the hole which allows excessive movement of the valve and subsequent wear. This can be remedied by sleeving the rim hole, and a flexible plastic washer could be used between the tube and rim. This enlargement and roughening of the area can often be in part due to incorrect fitment of the inner tube locknuts. It is very common to see one of the 2 locknuts fitted inside the wheel rim, bolting down the conical washer which is shaped to sit nicely directly against the rim and inner tube. The 1st lock nut should be run down to lightly touch the wheel rim, and then be backed off by half a turn and then the 2nd lock nut run down and the two tightened together before adding the valve cap. Locking the tube to the rim is not recommended, some leeway in this area is welcome so the tube and valve can flex naturally without restraint, hence backing off the lock nuts from being tight against the rim. Splits in the valve area can also be down to ageing of the inner tube - how old is it? Inner tubes should be changed at every tyre change, and on lower mileage vehicles we recommend for safety that tyres and inner tubes are changed at 10 years old regardless of tread wear. The valve hole can also allow contaminants in which can cause the valve to corrode. Having the lock-nuts very close to the wheel rim can help to avoid this, as can using a small amount of silicon sealer or grease on assembly. Best regards, Andy JAMES ***************************************************************************************************************** [/QUOTE]
Insert quotes…
Verification
What was Mr Vincent's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Buying Tyres for a Rapide
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top