Karl Tyrson
.020 Over
Greetings everyone. I am trying to replace my rear shocks as the ones I bought the bike with are worn out, any bump I feel it all along my spine 
So, I turned to progressive suspension (I carry a 412 now) to buy new shocks, BUT! There are only se 430 model on 12ā (430-4234b/c) and the page says I have to mount a 12.5ā (430-4219). But they are unavailable for I donāt know how long. Can you tell me if there is any difference between a 12ā and a 12.5ā? And I donāt really know if the 4219 and 4234 relates only to the inches (12 or 12.5) and either fit or something else. Any help is gratefully accepted.

So, I turned to progressive suspension (I carry a 412 now) to buy new shocks, BUT! There are only se 430 model on 12ā (430-4234b/c) and the page says I have to mount a 12.5ā (430-4219). But they are unavailable for I donāt know how long. Can you tell me if there is any difference between a 12ā and a 12.5ā? And I donāt really know if the 4219 and 4234 relates only to the inches (12 or 12.5) and either fit or something else. Any help is gratefully accepted.