Agreed ,it doesn’t effect the actual shock size, but it does bring the mounting points closer to effectively shortening it. So, like using a shorter shock but with the same travel.
No it doesn’t bring the mounting points closer – they are the same, just in a different place! The second part of your analogy is right.
You’re partly right. Because the shock is sitting in a different position, it is in effect in part of the bikes suspension travel phase, which due to the bushes now has a later start point, and a later finishing point.
Your second point is correct about the seat stay bridge is correct, because that now moves further than originally intended you should cycle the shock to check if there is any contact at full travel. Because (for arguements sake lets use 10mm difference) the suspension action now starts 10mm further into it’s travel than the manufacturer intended, it now also ends 10mm further than intended. Therefore there may be a tolerance issue at that point.
As a result of that, the offset bushes can cause some less than positive side effects in that as the bike is effectively now sat in it’s normal suspension curve before the rider is sitting on it. Some manufacturers bikes are designed so that the suspension works in different ways at different points of its curve – you may find that now sagged, you are beyond an ‘engineered’ natural pedal platform on the curve & now the bike pedals like a dog.
It’s a bit of trial and error, but at £20, it’s not the end of the world if it doesn’t work. The headset is a better option IMO as it just effects geometry, rather than messing with the suspension curves.
Worth using the search, there was a big post on here about them a couple of months ago & people trying to understand how they work.
