Best 85 series tyre

[2wheels]

kleber were the best rowcrop tyre we ever had.

 

[grass man]

Have a set of kleber here and they are cracking badly at about 50%

 

[C.J]

Have a set of kleber here and they are cracking badly at about 50%

Mine cracked before they'd wore out - still did 5500 hours

 

[daveydiesel1]

Kleber seem to be the tyre of choice with the contractors I help out. Having said that they're fitting 70 series tyres. What's the reason for 85 series? I prefer a 580/70r38 for every job except ploughing.

To get extra hight for ground clearance and road speed

 

[wdah/him]

580/70 38 is the same height, just 60mm wider and can be run at a bit reduced pressure.

 

[Will 1594]

To get extra hight for ground clearance and road speed

What is the tyre combo on the tractor at the minute ?
650/65. 580/70.520/85. /38. All same r c

 

[Boohoo]

To get extra hight for ground clearance and road speed

Extra height and speed compared to what other size?
All of these sizes will have similar heights, the differences in ground clearance and road speed won't be noticeable

My preference for an all round tyre is the 580/70r38 which if you delve into Kleber's technical data would give you an extra 1mm of ground clearance and an extra 0.24km/h over their 520/85r38.

 

[daveydiesel1]

Extra height and speed compared to what other size?
All of these sizes will have similar heights, the differences in ground clearance and road speed won't be noticeable
View attachment 852956
My preference for an all round tyre is the 580/70r38 which if you delve into Kleber's technical data would give you an extra 1mm of ground clearance and an extra 0.24km/h over their 520/85r38.

Theres aroubd 40mm dif in sidewalls of 520 85 compared to 580 70

 

[wdah/him]

Theres aroubd 40mm dif in sidewalls of 520 85 compared to 580 70

between brands?

 

[wdah/him]

we have a 390 here with 70 series one side and 85 series other side and it sits level. caught a tire and it cant be repaired so through on a spare we had.

 

[daveydiesel1]

Am i right in sayin that the 65 70 85 means the percentage of width is sidewall height as in 70% of 580 is 406 mm and 85% of 520 is 442mm or is that wrong. Its way i always thought it was worked out?

 

[wdah/him]

that's used to be my understanding but now I just go by the charts. seen and drove many tracotrs with different profile tires but appartently match up-70 series back 65 series front, and there was not addidional wind up on the 4wd, so just go with the charts but different makes have different tolerances

 

[Nearly]

Am i right in sayin that the 65 70 85 means the percentage of width is sidewall height as in 70% of 580 is 406 mm and 85% of 520 is 442mm or is that wrong. Its way i always thought it was worked out?

That's how is works out in theory, BUT they are the same height in practice.

 

[Boohoo]

Am i right in sayin that the 65 70 85 means the percentage of width is sidewall height as in 70% of 580 is 406 mm and 85% of 520 is 442mm or is that wrong. Its way i always thought it was worked out?

In theory that's correct but in reality it doesn't work like that. Sticking with Kleber, because I've got the charts in front of me. Their 520/85r38 has a diameter of 1838mm and a rolling circumference of 5432mm. Their 580/70r38 has a diameter of 1849mm and a rolling circumference of 5478mm.
Even between manufacturers there won't be any significant differences in height and I would prioritise in field performance every time.

 

[C.J]

When 70% profile tyres were introduced ,they were a bit economical with the truth.Most are nearer to 75% to get the correct rolling circumference.

60 and 65 profile tyres match up very well mathmatically to their 85% equivalent.e.g

650/60 = 390
600/65 = 390
557/70 = 390
520/75 = 390
460/85 = 391

 

[daveydiesel1]

Ok then what is best 580 70 38. Dont want michelin omnibib or trelleborg so what about kleber vredestien mitas

 

[C.J]

Ok then what is best 580 70 38. Dont want michelin omnibib or trelleborg so what about kleber vredestien mitas

Are your rims wide enough ?

 

[daveydiesel1]

Are your rims wide enough ?

How would ye know

 

[Thomas5060]

How would ye know

Should be stamped on them, if not measure them

 

[C.J]

How would ye know