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
Security bolt (rim lock) position in wheel
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="TouringGodet" data-source="post: 119846" data-attributes="member: 27"><p>My possibly incorrect logic - the tube is anchored to the rim at one place, the valve stem. The tube, by design, is very flexible. If the tire moves relative to the rim, it will try to take the tube with it, tearing the valve stem out, since it can't move. So a security bolt is added, to try and anchor the tire to the rim. I can see some argument that having the security bolt 180 degrees opposite the valve stem may not be optimum. So the security bolt is placed in one of the two holes that are closest together, with the valve in the other hole. That distance is the same whether it is valve first, or security bolt first. Here is where I get confused, can't picture things in my mind. If the bike is at a standstill, and you are launching the bike, as if at a drag strip, the rim wants to immediately start turning from the force of the motor, through the drive train. But the tire does not want to move, from the friction with the pavement. That is one direction of movement between the tire and rim. But when the bike is rolling down the road at 60 MPH, and you slam on the rear brake in a panic stop (assuming a brake that can lock up the wheel), the rim stops, but the tire wants to keep moving (or skids along the pavement, either way, a force wanting to move it relative to the rim). In both scenarios, is the tire trying to move relative to the rim in the same relative direction, or in the opposite relative direction??? I can't wrap my mind around the "frame of reference".</p></blockquote><p></p>
[QUOTE="TouringGodet, post: 119846, member: 27"] My possibly incorrect logic - the tube is anchored to the rim at one place, the valve stem. The tube, by design, is very flexible. If the tire moves relative to the rim, it will try to take the tube with it, tearing the valve stem out, since it can't move. So a security bolt is added, to try and anchor the tire to the rim. I can see some argument that having the security bolt 180 degrees opposite the valve stem may not be optimum. So the security bolt is placed in one of the two holes that are closest together, with the valve in the other hole. That distance is the same whether it is valve first, or security bolt first. Here is where I get confused, can't picture things in my mind. If the bike is at a standstill, and you are launching the bike, as if at a drag strip, the rim wants to immediately start turning from the force of the motor, through the drive train. But the tire does not want to move, from the friction with the pavement. That is one direction of movement between the tire and rim. But when the bike is rolling down the road at 60 MPH, and you slam on the rear brake in a panic stop (assuming a brake that can lock up the wheel), the rim stops, but the tire wants to keep moving (or skids along the pavement, either way, a force wanting to move it relative to the rim). In both scenarios, is the tire trying to move relative to the rim in the same relative direction, or in the opposite relative direction??? I can't wrap my mind around the "frame of reference". [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Security bolt (rim lock) position in wheel
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