Enduro tyres

[HP]

I was wondering if any of you gurus could help me, I pick up my KTM on Monday & she needs new set of tyres, while checking out prices I've noticed the previouse owner has done something diffrent.

Standard she should have 90/90 18 F & 140/80 18 R but he's changed it too 90/90 21 on the front, any idea why? And what affect will it have?

[Jonesy]

21 is the diameter of the wheel.

Sounds like the wheels are off road wheels not supermoto or road wheels!

[HP]

Thanks, I guess he used it on and off road  as its all road legal 

[MOzZereLLa]

What bike is it HP??

[HP]

LC4 640 enduro Moz