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Author Topic:   Grooving n Siping DOTs
Dirt Freak

Total posts: 279
posted October 11, 2004 12:36 PM  
How can grooving and or siping help my Cooper Cobras or Good Year DOT 255/60/15 tires on a heavy Street Stock(3350#)? The tires have alot of meat on them even though I grind'em a little now and then. What can you guys recommend for going to work on these tires for better grip? Also, what kind of air pressures do you guys run on these with now bead lock or inner tubes?


Dirt Forum Champ
Total posts: 753
posted October 12, 2004 12:01 AM  
I wouldn't do anything to them, just bolt em' on and go. If you want better grip then soften em'. Use a chemical made for softening tires thats undetectable like the stuff sold at speedway motors, think its called fast lap or something like that. When you grind your tires becareful because you can do more damage than good. The reason for grinding is to break the glaze from them that is cause by heat cycling (getting hot then cooling) When your grinding use a slow speed, if the tire is smoking then your going too fast. Its also not necessary to remove a 1/4" of rubber while grinding LOL!! Your just breaking the glaze!! Don't grind the tire down to nothing!! Hope this helps and of course its JMO!!

Dirt Freak

Total posts: 279
posted October 22, 2004 06:18 AM  

Dirt Maniac

Total posts: 195
posted October 22, 2004 12:09 PM  
There is a good book on grooving and siping late model tires from steve smith. It is called something like "the selection and application of dirt late model tires" it is mostly about hoosier tires but goes into great detail as to the hows and whys of grooving and siping.


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