The Milners are slightly uprated, that's what I have on now, and it was only a slight uprating from my afaik 180k OEM spring even though they are much thicker wire (18mm vs 16mm). I've got some Pedders 7290's to try out in the next week or two to see if they do any better which will be interesting because they are only 17mm wire but have an extra coil, 10mm longer free height and hopefully higher quality steel. If the Pedders work out ok then the Milners will be spare if you want to give them a try. If the Pedders are weaker than the Milners then I'll have to put the Milners back on and decide what to do with the Pedders.