Hello Markus,
You should have no problems in finding your Michelin tire in Thailand (Continetal and Heidenau are not available in Thailand). To find a Michelin motorcycle tire dealer you just need to click on the link below this and a list of dealers appears (takes some time so relax).
motorcycle.michelin.asia/Home/Buying-Guide/Find-Your-Dealer#country=th&pid=3994&cid=17077
Of course you can also contact the official BMW Motorcycle dealers in Bangkok...
BKK Motorcycles Co. Ltd - Telephone: 02-673 3102 to 5
Hi,
I´m Markus from Germany, I´m traveling, with my girlfriend, around the world - now i need new tires for my BMW F 650 Touratech Rallye -
the dimensond are 21" 90x90 front and 18" 140x80 or 90 - i prefore Michelin Anakee ...Continetal TKC 80 or Heidenau Scout
at the moment we´re on Koh Phayam - we wanna go further at the next few days... so it´s possibile to order this tires and what is the price of them.
regards Markus and Esther