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Tractor Pulling Discussion Forum

Tires Need some direction

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CJF RC77

02-05-2008 09:40:30




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I am new to antique tractor pulling my Oliver RC 77 currently has 14.9x38 that are cut on it. They are pretty old and cracked but are also hard. Is it better to stay w/ older tires or replace w/ new tires? Then as far as size goes what is the right direction to go?




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Mike n Mo

02-05-2008 19:34:45




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 Re: Tires Need some direction in reply to CJF RC77, 02-05-2008 09:40:30  
in general, older tires are better for pulling because they are harder, meaning the sidewalls and tread don't deflect as much under a hard pull. On a new tire, the tread will actually buckle backward. In a soft (by comparison) field a newer tire will do ok because it can penetrate the ground, but a pulling track is usually much firmer than a cornfield. A new tire will have more bar height than is needed for pulling. Optimum tread height will vary depending on the soil type and moisture level of the track, but generally 1/2 tread or less is the best. Kinda long winded, but pullers can debate tire selection for hours on end. Mike

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CJF RC77

02-06-2008 04:38:38




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 Re: Tires Need some direction in reply to Mike n Mo, 02-05-2008 19:34:45  
How about the difference between 23 degree vs 45 degree tires? I am guessing as far as brand everyone has their own opinion on that. Thanks for your insight.



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Mike n Mo

02-06-2008 06:45:44




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 Re: Tires Need some direction in reply to CJF RC77, 02-06-2008 04:38:38  
For cut tires, you'll find the majority of pullers use 23 degree Firestones. For uncut tires there is a wide spectrum of brands that have good success, both 45* and 23*. pay close attantion to air pressure. Too much, and the tire won't flatten out, and too little makes the sidewalls wrinkle and the tread bars fold back. Can't give you specific pressures to run as that changes with both the tire size/brand/ply as well as the weight of the tractor. It takes a lot of trial and error to find the right combo. Mike

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