firg
Spanner Monkey
Joined: 18 Feb 2004
Karma :  
|
 Posted: 12:00 - 10 May 2005  Post subject: Spoked wheels... |
 |
|
Hi all,
Ive done a search for this, but i havent been too succesful -
What are the advantages of having spoked wheels? Its just BMW still seems to put them on its GS adventure bikes:
https://photos.innersource.com/photo/5800/l/BMW-R1150GS-Adventure.jpg
Among others (so its not just for off road shock absorbtiopn)
thanks,
cabbage
____________________
Ex-'96 Bandit 600S -> '99 Bandit 600 -> K7 V-Strom 650 |
|
cagiva gezzer
World Chat Champion
Joined: 17 Mar 2003
Karma : 
|
| Posted: 12:30 - 10 May 2005 Post subject: |
|
|
Stolen from a yank atv forum. The original thread has gone, so its just a snippet.
| Quote: | Generally, spokes fail from fatigue, not from overloading. Fatigue failures are a weakening of the spoke that comes from constant *changes* in the loading. The dominating factor, in this case, is the weight of the rider, applied once per revolution of the wheel. Events such as bumps, curbs, etc, only intensify this changing load and therefore fatigue. It should follow that distributing this fatigue and loading over more spokes increases the life of each spoke. Of course a single wire type spoke is not as strong as a single cast spoke... and here's where we'd need some data... lets say on average its a 5 spoke wheel vs. a 32 or so, spoked wire wheel. That means each cast spoke would have to be at least 6 times as strong as a wire spoke. UNfortunately, that is only in tension and compression, in which case I'm sure the cast spoke is stronger - in those cases strength will scale with cross section. BUT, the loading that leads to fatigue is much different for wire/cast spokes. The wire spoke is much less stiff so it will very rarely experience loading in its weakest orientation (laterally or torsionally), while the stiffer cast spoke will be subjected to both lateral and torsional loads much more. Add all this up and you have a wheel (cast) that is definitely not as strong in a harsh highly varying loading situation - like off-road riding.
To put it most simply, I think yes, spoked wheels are stronger but not as stiff as cast wheels. So the applications under which they are used match this.
|
____________________
"because one stroke isnt enough and four strokes waste two" |
|
stinkwheel
Bovine Proctologist
Joined: 12 Jul 2004
Karma : 
|
| Posted: 12:33 - 10 May 2005 Post subject: |
|
|
As far as I know, spoked wheels are stronger than cast ones. They would also tend to flex slightly rather than crack in an impact thus making them a whole lot better for use on poor road conditions.
Oh yeah, they are also generally speaking cheaper to make too but you need to use an inner tube with them which some people consider to be a problem when most of the stickier tyres are tubeless fitment.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
|
firg
Spanner Monkey
Joined: 18 Feb 2004
Karma :
|
| Posted: 12:51 - 10 May 2005 Post subject: |
|
|
le woot \o/
2 in a row for cagiva gezzer 
thanks also stinky
____________________
Ex-'96 Bandit 600S -> '99 Bandit 600 -> K7 V-Strom 650 |
|
Help & FAQs
Search BCF
Members
Groups
Events Calendar
rating
rating