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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: NCbob on May 31, 2006, 05:34:47 AM



Title: Calculations for selecting proper Hubometer by tire RPM's
Post by: NCbob on May 31, 2006, 05:34:47 AM
No doubt this question has been broached in the past but searches haven't uncovered the answer.

With 12-22.5 tires how many revolutions would my tires need to make to clock 1 mile?

I'm not looking for MPH, just recorded miles.  I'm trying to find a Hubometer on E*** and so far they mostly list them by tire RPM's.

NCbob


Title: Re: Calculations for selecting proper Hubometer by tire RPM's
Post by: belfert on May 31, 2006, 07:02:19 AM
Stenco lists Hubodometers by tire model in the catalog on their web site.  I can't recall if the catalog lists the RPMs for each tire or just the required model number.

Brian Elfert


Title: Re: Calculations for selecting proper Hubometer by tire RPM's
Post by: TomC on May 31, 2006, 07:14:03 AM
Depending of tire make and model, could be anywhere from 484 to 492 rpm.  We need your exact drive tire model then can look it up.  Or it's easy just to go to google for your tire company.  Good Luck, TomC


Title: Re: Calculations for selecting proper Hubometer by tire RPM's
Post by: NCbob on June 01, 2006, 03:03:04 PM
Tom, shouldn't the size that I posted tell you what the RPM's of the tire are?  There must be some leeway somewhere...I'd think.

NCbob


Title: Re: Calculations for selecting proper Hubometer by tire RPM's
Post by: TomC on June 02, 2006, 06:55:49 AM
Bob- the range I gave you was looking through the Michelin book.  It all depends on the tire model since highway steering tires will have less tread thickness than drive tires which changes the overall diameter hence the rpm.  For instance, Bridgestone makes a drive tire with 32/32" (or one inch) thick tread for longer lived tire. A steer tire may be 26/32" or so.  If you give me your tire make and model of the tire, I can see if I can look up the exact rpm.  Course that will be for a new tire, as it gets worn, the tire will turn faster.  Good Luck, TomC


Title: Re: Calculations for selecting proper Hubometer by tire RPM's
Post by: NCbob on June 06, 2006, 04:18:03 PM
I Called Michelin and found out that my tires rotate 490 times per mile.  Thanks for the help!

NCbob