umma gumma tread is grey with amber/skin side walls.obi-wan-mtb":3jpk42as said:Hi Scant,
Are these grey or black or were the umma gumma's always grey?
merci
The Ken":1de52861 said:you can see it, but on my laptop at home it also looked black. At work though it is grey
Woody":445m1wev said:Tempted by this for my '93 M2 , how hard will it be to get another umma gumma though!!