I fitted RSlll's on my GTL a few days ago and have since done around 3,000kms on them replacing the original OEM Bridgestones. Grip and stability are much improved, moreover the left pull I did have on my 2018 GTL has gone.
Initially, when the Dunlops were brand new, a left pull was still evident though reduced by say 50%. More of a gentle slow turn as opposed to a distinct pull as before. Since then I've had something of an epiphany......
During a 13 hrs ride up to the north German Coast and remembering a previous comment gleaned from a member, I moved position on my RDL seat slightly to the right. (I will go back through the threads, try to find him and say thank-you). NO TURN OR PULL, it had gone. If I moved a little more to the right I could get the bike to pull right when the bars were released. Now all these things are somewhat subjective but it would appear that over the years I've adopted a slightly left of centre riding position. Clearly my GTL, with or without Dunlops ( I have no comparative evidence) is sensitive to weight distribution. I assume others will be the same? After a little practise and shuffling around I could find the sweet spot as a matter of course. The bike now stays straight for a short while before turning LEFT or RIGHT dependent on the conditions of the moment, camber, wind etc.
Other variables are a new CalSci Screen and an RDL seat, though on the face of it they do not appear to be a factor.
Once again thanks to all, this forum has improved my knowledge and therefore enjoyment immeasurably.
Safe riding and best regards,
2018 BMW K1600GTL