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Post by fordpower111 on Dec 5, 2012 22:45:54 GMT -5
Dana 70 4.10's with 14" R1 tractor tread tires.and homemade centers.
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Post by chevyman422 on Dec 6, 2012 18:02:02 GMT -5
transmission ratio has a lot to do with final drive ratio. i personally run a 28in tall tire kurb kicker style with a 700r4 trans and a 5.13 gear. thats really steep but i run on asphalt
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Post by oldtrx on Dec 10, 2012 4:20:27 GMT -5
7.00x15's(29") 3.50 gear, th400, roller 305. Working on my next car with same engine/trans running 4.88's with a set of 27" tall v treads. If I can sell them im wanting to try maybe a 25" with 4.88's or a 23" with the 3.50's
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Post by supercheater on Dec 21, 2012 18:21:41 GMT -5
For you that runn the real small tires like 12" on back of your cars how much do you notice your gear ratio changing? I run 8.50-15 skids now with 4.56 and in the past 15 years have always ran 5.57 or 5.13 and would like to get back to that final ratio i was at ,will the 5.70-12 skids get me close to that again or should i just get rid of the 4.56 and go back to deeper set?
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hemi1
Feature Winner
Posts: 2,425
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Post by hemi1 on Dec 21, 2012 18:42:31 GMT -5
They have fomulas out there to figure gear ratio to tire hieght for drag racing ect...In general a shorter tire will make the gear ratio deeper.
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Post by rhull1977 on Dec 23, 2012 12:08:33 GMT -5
The average is .06 difference in gear ratio for every inch of tire.
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Post by swanny454 on Dec 23, 2012 21:56:22 GMT -5
rhull1977 is correct
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skiprip
Heat Winner
Don't talk about it, be about it.
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Post by skiprip on Dec 28, 2012 12:12:51 GMT -5
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cstephens15
Future Icon
born to derby, forced to work
Posts: 127
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Post by cstephens15 on Dec 29, 2012 15:58:02 GMT -5
What kind an size of tires do you use?
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Post by racer35 on Dec 29, 2012 16:01:10 GMT -5
i use tractor tires and a chevy 305 and i win every derby
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Post by derby507 on Dec 29, 2012 16:01:28 GMT -5
Derby car? Driver?
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Dec 29, 2012 17:03:06 GMT -5
Derby car.. 7.00x15 up front. Or 8-14.5s. On the rear 6-14 tractors lr 7-14 tractors. Hopefully gonna try some skidders this year.
Driver.. Not there yet but prob gonna be some agressive tread Mickey Thompsons.
Sent from my SCH-R760 using proboards
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cstephens15
Future Icon
born to derby, forced to work
Posts: 127
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Post by cstephens15 on Dec 29, 2012 17:12:28 GMT -5
Derby Car Tires.
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demodave216
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If You Don't Want A Sarcastic Answer Then Don't Ask A Stupid Question!
Posts: 3,471
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Post by demodave216 on Dec 29, 2012 17:30:30 GMT -5
I run 28 X 8.5 15" 10 ply skid steers on the back and 10 ply 7 X 15" trailer tires on the front
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B34
Heat Winner
If you can't shoot it, derby it, sleep with it or eat it, you don't need it
Posts: 185
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Post by B34 on Dec 30, 2012 0:39:18 GMT -5
25 x 8.5 14 skidders on rear and just some 8 ply 225 15's trailer tires on front
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