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BT-45
100x19 front
120x18 rear

Ken

AHRMA 412
Vintage racing - old guys on old bikes
 

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yup, the 120/80x18 will work on the rear. I have the BT45s on my Seca550 race bike. I ran them at Grattan last summer. The front worked good and the rea was a little funny. I think it is because I have a 130x18 on a WM-3 rim and it makes the profile funny. I am putting a wider rear wheel on this year and try the 130 again. The font stuck and the rear ould slide in turn 2 and 3 and 4. I also had some ground clearance issues and bad shocks so I am not willing to blame it on the tire. Gordon Hamilton runs them on his SR500 and he can win races.

Ken

AHRMA 412
Vintage racing - old guys on old bikes
 

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I have the V rated tires on my racebike. I am sure I needed the higher rating due to the blazing speeds the Seca is capable of.

Ken

AHRMA 412
Vintage racing - old guys on old bikes
 

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If you have a WM-3 rim(2.15) then the 120 will work. The 130 will fit, but not work as well. The 110 is probably closer to the original size and will also work. I suspect the 120 will look and work as well or better.

Ken

AHRMA 412
Vintage racing - old guys on old bikes
 

· Banned
Joined
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6,272 Posts
If you have a WM-3 rim(2.15) then the 120 will work. The 130 will fit, but not work as well. The 110 is probably closer to the original size and will also work. I suspect the 120 will look and work as well or better.

Ken

AHRMA 412
Vintage racing - old guys on old bikes
 
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