Row Crop vs Standard

[Puller883]

Several pulls limit the Row Crop tractors to 15.5X38 and the Standards to 18.4x34. Can anyone tell me why this is? Isn"t the playing field level when you let both run the same tire? As for "that"s what came on the tractor" seems to not always be the case with row crop or standard.

 

[HLW]

Dont know about other tractors but on olivers the row crop and standard have different gear ratios.if you have a standard with the same size tire as a row crop it will go faster.

 

[Charles E. McNelly III]

I would imagine that it all has to do with "Contact Patch", which is the amount of rubber contacting the ground.
Charles

 

[Anonymous-0]

Ditto on the speed thing!

 

[Mike Bock]

sounds like who made the rules must have a standard tractor

 

[CJ_1080]

usually a row crop has lower gears than a standard or utility. dont know if this helps explain it but thats my story and I am sticking to it.

 

[deere guy]

(quoted from post at 14:36:05 09/24/09) Ditto on the speed thing!

Same deal with the AC's but they let them run 38's. What did they come with? 26's or 28's? They must have better lobbyists.

 

[Dblair]

why don't you go to the Firestone charts and see how unfair these rules are and decide if you want to be with this club or not . May a row crop tractor run the same tires and wheels as the standard tractor ?

 

[kendak]

factory option on a WD & WD-45 was 11X38 rears ..thats why they can run them....take a look in the parts book...Kent

 

[Too Far Gone]

If I pull my 400 with 15.5-38 side by side with W-9 on 16.9-34 tires there is very little difference in height.The 15.5 is ever so slightly taller

 

[jd b puller]

Hey Kent, I don't have any AC parts books. Was that on the hi crop version or the standard row crop?

Thanks,

 

[kendak]

don't really know ..they don't call it Hi-crop in the book it's referred to as Hi-clearence ...I guess that would be the same thing...a farmer up the road used a diesel one when I was in HS in the 60's to spray his cotton...my brother tought me how to cultivate cotton with a regular WD-45 & front mount [no P.S.] 4 row rig in 1961...take care ...Kent

 

[kendak]

forgot to say that the AC's I saw running with 38 rears almost always had single fronts....Kent

 

[Anonymous-0]

just remember you can put the faster standard gearing into a rc, adopt a tire square inch rule and a speed limit and eliminate most of the differences. We have a 210" rule through 5500 then 18.4's after that with a 3mph limit in our class 1

 

[A.P.]

Most tire patch rules assume everyone is running a row crop tractor and are typiccally set using row crop tire sizes (i.e. 14.9x38" = 200 sq.in. or 16.9x38" = 252sq.in. contact patch) and act like standard and wheatland tractors do not exist. The 210 (16.9x28") rule isn't to far off, but I'd suggest bumping it up to 216 sq.in. (16.9-30) which is a common size on Oliver 88/Super 88 standards and are easy fit into the 5500# class.

I think the advantage normally goes to the taller tire (14.9x38) if the contact patch is close.