tyre height profiles front to back

In need of some new boots before winter for ploughing with naud that has 14"share and board working width. New to me tractor on 600/65r38 and 480/65r28. The rears are michelins and seem to measure close to 530 actual width. Currently plough with different tractor on 420/85r34 and get along fine especially when slippery, wont be using this tractor anymore before suggested. Can i change rears of new tractor to 520/70 r38 and keep existing 480/65r28 fronts? I think a true 600/65r38 will leave a lot of trampling and be more slippy. Thanks
 

flywheel

Member
Location
wae up north
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Cheers I checked the calculators before but I'm still a bit undecided. The naud is very old and there's not much spare even with the 420s. There is possibility i could change the plough to suit tyres as well. The 600 are well worn but not quite racing slicks yet and found them slippy even on grass in general. Been reading up all the tyre threads would the 520 be considered a good all rounder?
 

mo!

Member
Mixed Farmer
Location
York
Chances are that the 600s are too hard, get some decent advice on tyre pressure (Michelin have reps that will do this) and go from there.
 

brentnz

Member
Location
New Zealand
In need of some new boots before winter for ploughing with naud that has 14"share and board working width. New to me tractor on 600/65r38 and 480/65r28. The rears are michelins and seem to measure close to 530 actual width. Currently plough with different tractor on 420/85r34 and get along fine especially when slippery, wont be using this tractor anymore before suggested. Can i change rears of new tractor to 520/70 r38 and keep existing 480/65r28 fronts? I think a true 600/65r38 will leave a lot of trampling and be more slippy. Thanks
Yes you can. 520/70r38 is a good all round in my opinion. 18.4r38 should also be similar but probably need narrower rims
 

Nearly

Member
Location
North of York
Can mix and match profile ratios as long as you work across the Michelin chart and keep tyre heights the same.
Interesting Boohoo saying 600 are too wide etc. I agree 600 are a floating tyre, narrower ones are grippier. My 600's had lived a life for someone else first though.
 
Think i will bite the bullet and change all four. So either 580/70r38 and 480/70r28, 520/70r38 and either 420/70r28 or 480/65r28. If going the narrower on back would i be better with narrower fronts to match. Its mf7480 with front links, doesnt drill and no loader. Thanks

edit: current rims 14" and 18"
 
Last edited:

3350turbo

Member
1 of my tractors was on 14.9 28. And 18.38.s then replaced fronts with 420.70 28.s . Later on in its day it got 480.65 28.s and 600 65 38.s all using same rims . There is choice of 520 70 38.s
 

Boohoo

Member
Location
Newtownabbey
Think i will bite the bullet and change all four. So either 580/70r38 and 480/70r28, 520/70r38 and either 420/70r28 or 480/65r28. If going the narrower on back would i be better with narrower fronts to match. Its mf7480 with front links, doesnt drill and no loader. Thanks

edit: current rims 14" and 18"
I'd go with 580/70r38 and 480/70r28. 520/70r38, like the current 600/65r38 are too low for a 7480.
If you think the 580s will be too wide for ploughing, 520/85r38 and 420/85r28 are another option.
 
I'd go with 580/70r38 and 480/70r28. 520/70r38, like the current 600/65r38 are too low for a 7480.
If you think the 580s will be too wide for ploughing, 520/85r38 and 420/85r28 are another option.
yes thats what i was generally thinking but as above last few comments i will have to see whats available as amount of stuff ive been refunded for due to lack of availability has been shocking this year. Thanks
 

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