Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back > General Discussion > General Discussion (Moto Related)
Forgot info?

Welcome to! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.

FREE MH Decals by MAIL!

Share This Thread: 
Subscribe to this Thread Thread Tools
Old 08-19-2012, 09:01 PM   #41
Senior Member
Chuckster's Avatar
Join Date: Dec 2010
Location: Alvin
Feedback Rating: (2)
Posts: 2,456

2006 Yamaha R1

Originally Posted by Bald 'n Gimpy View Post
, I want YOUR budget!!!

It's gonna be a while before she let's me drop this much cash again. LOL. Looks like I get to buy more jewelry for her now.
Chuckster is offline   Reply With Quote
Old 08-19-2012, 09:02 PM   #42
brian1570's Avatar
Join Date: Jul 2012
Feedback Rating: (0)
Posts: 1,170

Experience: 10+ years

07 Dynasaur
09 GSXR600(sold)
06 CBR600RR(wrecked)
04 Buell lightning(sold)
08 nightster(sold)

Originally Posted by Volfy View Post
Yep, it's called rotational inertia. It's measured in kg-m^2 or lbm-ft^2.

1 lbm x (0.25ft)^2 = 0.06

1 lbm x (0.7ft)^2 = 0.50

0.25ft is 3in. 0.7ft is 8.5in, which is half of 17in.

So a 1 lb mass on the rim carries nearly 10 times more rotational inertia than the same 1 lb mass 3" from the hub. Now then, the typical 17" sport bike wheel is spinning at about 1000RPM at 80mph. The effect of that rotation inertial multiplies even more the faster that wheel spins.

Sorry for geeking out on the math. Couldn't resist.
no wonder those rims are so expensive!
brian1570 is offline   Reply With Quote

Thread Tools

All times are GMT -5. The time now is 11:17 PM. is not responsible for the content posted by users.
Privacy Policy