Speedo question with new rims

Reply Subscribe

Thread Tools

Search this Thread

Nov 7, 2004 | 10:43 PM

mr_muff

Thread Starter

Registered User

Joined: Dec 2002

Posts: 797

From: Surrey, BC

Speedo question with new rims

ok im just curious as to wether im going faster or slower now. old rims where 275/40/17, and i just got some 275/40/18's. like will my odometer rack up the km/s or will they go up slower.
TIA

Nov 7, 2004 | 11:53 PM

GreenDemon

Registered User

Joined: Nov 2003

Posts: 1,770

From: Mishawaka, IN

Re: Speedo question with new rims

Indicated speed should be about 6% less than actual speed.

Nov 8, 2004 | 12:02 AM

Injuneer

Administrator

Joined: Nov 1998

Posts: 71,098

From: Hell was full so they sent me to NJ

Re: Speedo question with new rims

My calculator says you went from a 25.66" tire to a 26.66" tire, and the speedo would read 3.9% less than actual speed, and you will be adding only 962kM to the odometer for each 1,000kM you drive.

These number can vary slightly, depending on the exact measurements for the specific tires you chose.... not all manufacturers show identical dimensions for a given size tire.

Last edited by Injuneer; Nov 8, 2004 at 12:07 AM.