Sumitomo have a dealership in Rashidiya. I thinks its called a Shaheen tyres. rightafter VW comming out of the airport tunned heading towards Biz bay. Last shop on the corner to your right.
For Nitto tyres call
Atif Iftikhar
050 4592376
He works for Zafco the dealers for Nitto, tell him you were refered here by
www.emarat4x4.com and he will give you a good price. They have excellent service. They will even come to your house install and balance your tyres for free.