DodgeMan Posted August 30, 2012 Share Posted August 30, 2012 I`m looking for a set of hubs for my B81. I have 11.00r24 tires right now. Found out there getting impossible to get.I would like a set of 22 inch hubs so i could run 12.00 r 22.5 tires. Even tho the 24 inch tires look better.Am i better to go with bud hubs or stay with spiders? (like the look of spiders tho)I would deff be intrested in higher gear ratio rears. 700`sCan you still buy gears for the old rears?Axle info isCRDP112A5078911KHA5113P6R-824 (( or the 4 could be a A))I believe the numbers on the spiders are 8QJ3144P2.It is a 1962 Mack B81 SX.Thanks Paul Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/ Share on other sites More sharing options...
David Posted August 30, 2012 Share Posted August 30, 2012 With 22" hubs you will need to run 24.5 tires. Not 22.5. Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135587 Share on other sites More sharing options...
DodgeMan Posted August 30, 2012 Author Share Posted August 30, 2012 With 22" hubs you will need to run 24.5 tires. Not 22.5.Thanks david. typo. Still might take them tires off of you yet.I cant seam to make my mind up what i want to do. Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135588 Share on other sites More sharing options...
Maddog13407 Posted August 30, 2012 Share Posted August 30, 2012 think youd be better off findin a newer set of 58 rears out of an Rd or Dm. that way youll have newer style everything and easier tire options. im not sure if you can get gears for the olders rears, the R is ratio 8.24, slow as hell, even with a double over quad box Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135589 Share on other sites More sharing options...
DodgeMan Posted August 30, 2012 Author Share Posted August 30, 2012 Dum question, what size tire and how slow is slow as hell? Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135590 Share on other sites More sharing options...
Maddog13407 Posted August 30, 2012 Share Posted August 30, 2012 some of them ran 1200 24's and others ran 24.5's which are 22''. and slow as hell would probably be around 48-54 mph, if that Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135591 Share on other sites More sharing options...
DodgeMan Posted August 30, 2012 Author Share Posted August 30, 2012 Is the 12.00 r 22.5 the same size tire as the 11.00 r 24??Thanks Paul Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135592 Share on other sites More sharing options...
Maddog13407 Posted August 30, 2012 Share Posted August 30, 2012 12 R 22.5 would be a 20'' wheel or hub.. 24'' is 24'' Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135594 Share on other sites More sharing options...
David Posted August 30, 2012 Share Posted August 30, 2012 Is the 12.00 r 22.5 the same size tire as the 11.00 r 24??Thanks Paul11r24=436 revs per mile12r22.5=486 revs per mile12r24.5=463 revs per mile Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135598 Share on other sites More sharing options...
DodgeMan Posted August 30, 2012 Author Share Posted August 30, 2012 I'm not sure why I keep typing 22.5 when I mean 24.5.Thanks paul Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135643 Share on other sites More sharing options...
DodgeMan Posted August 31, 2012 Author Share Posted August 31, 2012 So if i have the Double overdrive quad box, and 824 rear gears and i leave the 24 inch rubber on how fast is the truck? Quote Link to comment https://www.bigmacktrucks.com/topic/27067-mack-rear-gear-ration-and-spider-questions/#findComment-135690 Share on other sites More sharing options...
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