Weeder harrows

[mikep]

Hello.
I have just bought a S/H set of opico grass harrows aka weeder harrows. They are fitted with 8mm tines whereas the weeder usually comes with 6 or 7mm.
We are on very heavy land so the question is will the 8mm knacker winter wheat?
Tia.

 

[organic antares]

We had 8mm tines on ours, but worn out. They tend to draw lines in wheat rather than move side to side as well, changed to 7mm last year and seems to work better.
Only changed tines because old ones were worn out, was quite expensive job but worthwhile