Hey Paul,
Just to clarify.
Are you saying that a supermotard bike with 17" wheels has MORE ground
clearance than an EXC with 21" X 18" wheels?
Or do you mean seat height?
Anyways, there are 17" off road tires out there, but they are more $$ than
standard 21" X 18" tires.
Check out rockymountainatv.com
Your top end speed will be reduced with smaller diameter tires also.
__________________
2011 Husaberg TE 300
2002 640 LC4e
Past Rides
'03 KTM 450 EXC (SOLD)
'01 Honda XR650R (SOLD)
'98 Honda XR600R (SOLD)
'95 KTM 620 RXC (SOLD)
'88 Yamaha TT600 (SOLD)
'86 Yamaha XT 350 (SOLD)
'84 Yamaha IT465 (STOLEN)
'83 Kawasaki KDX 450 (SOLD)
'83 Honda CB1000 Custom (SOLD)
'82 Kawasaki KDX 400 (SOLD)
'77 Yamaha DT200 (SOLD)
'70 Honda CT70 (SOLD)