Marco wrote: [quote quote=feejer][quote quote=Marco]Feejer
thats for that info and i'm runnig solo with light luggage always
but i just went to look my tyres and rear tyre is 72W.
So as i'm not a tyre specialist would you like to explain to me(and oter's who dont know) what is the real meaning behind that number.
Auke's chart explains it well and can see the 72 rating is more than 80 Kg under what is supposed to be on the bike. You have been running on the 72 rated tires and had no problems because you have not loaded it heavy along with a passenger. But if you were to do so and go on a long tour, I would hate to see you have a tire failure while underway due to overload, very dangerous.
This is what the US based LT site says is recommended:
"IMPORTANT NOTE: The LT is a HEAVY bike and requires special tires. Do not buy just any ME 880s or BT020s in the same size as your current tires. You must buy the LT specific tires with the following size/part info:
Metzeler ME 880
Front Tire: 120/70 B17 M/C 58V TL ME880 Marathon Front - 2.50 BAR
Rear Tire: 160/70 B17 M/C 79V Reinf. TL ME880 Marathon
Front Tire: 120/70R17 BT020 BW TL M 58V V 23.8 4.7 5 520lbs 42psi 3.50
Rear Tire: 160/70R17 BT020 BW TL M 79V V 25.9 6.1 8 963lbs 48psi 4.50
NOTE: These are the "V" rated tires. The "Z" rated tires are not load rated for the K1200LT!"
http://www.bmwlt.com/forums/faq.php?faq ... labletires
I noticed right away when the dealer put the wrong tire on. The 79 rated Bridgestones were always very solid and stable. The lower rated 73 Dunlops were terrible and the bike felt like it had a broken spine and all squirrely. I think you will find with the proper load rating and stiffer sidewall, your LT will handle so much better.
Try the BT020 Bridgestones if you can find them there, or the ME-880. The ME-880 is not as sticky, but over there in the hot roads/climate should be no problem to get them to working temp quickly.
WOW Thanx for Auke & Feejer
talking about broken spine,, ones i got a road i had that feeling right away in the higher speed, BUT they put Metzeler Roadtec Z6 170/60/ZR17 MC
and in font i Have worn original 120/70/17 marathon
110Km'h, im riding like with cooked Spaketti, not comfrtable at all, BUT i thought that might be because new 60 serie on back and 70 serie in front,,what ya think?
That new 170/60/17 is about 20mm smaller in dia than your old 160/70/17 (if that's what you had on there) and therefore spinning faster. I'm surprised you are not getting an ABS fault light due to front/back speed mismatch to the ABS computer.
Also, I'm almost certain that Z6 is a radial. You may have a bias ply Marathon on the front. Mixing a bias and a radial on the same bike is bad news and can cause all kinds of strange handling on any bike. Even more so on a monster like the LT.
Do what you can to get the proper Marathon back on there to match the front ASAP. The Z6 is a light sportbike tyre and is totally outmatched on that LT.