Off-set bushes – help needed
doof_doof – Member
I mounted mine both pointing ‘down’. That way you don’t lose any travel. Just need to make sure there are no frame clashes at bottom out.
Pointing them down, which I assume is neither pointing to the shock or away from it, is utterly pointless. You might as well not run any. For them to slacken the bike out they need to be pointing towards the shock and if you want to steepen it, they need to point away from it. Pointing ‘down’ means the shock will have the same effective eye to eye length, so won’t change the geometry.Posted 5 years agosam42Member
Oh the old offset bush argument again! Surely to slacken the head angle the holes would have to be “pointing away from the shock” effectively shortening the eye to eye length, achieving the same as compressing the shock 10ish mm? Don’t even get me started on “both pointing down”.Posted 5 years ago
EDIT- I see, vertical shock, bit surely the top offset bush should be orientated upwards? Otherwise the eye to eye remains the same, the shock just sits lower?
sam42 – Member
Oh the old offset bush argument again! Surely to slacken the head angle the holes would have to be “pointing away from the shock” effectively shortening the eye to eye length, achieving the same as compressing the shock 10ish mm?
No, think about it again. The shock itself doesn’t change in length, so having the holes pointing away from the shock would length the effective eye to eye length, meaning that instead of the bike squatting down, it would get higher. To get it lower and therefore slacker, the holes need to be pointing towards the shock, so the effective eye to eye length is less.Posted 5 years agomattjevansMember
The whole shock is now mounted lower than it was, so the rear end is effectively cycled through it’s travel slightly. BB is lower, HA and SA are slacker, total travel not affected.
Total travel isn’t affected no matter how you mount them (unless you don’t have clearance in which case DON’T use them) – they only alter eye-to-eye ie a 190×50 shock becomes a 184×50 shock, or if mounted the other way a 196×50 shock.
Yes mounted vertically (horst/4 bar configuration). The shock eyelet centreline is now below the bolt hole. unfortunately I don’t have access at the moment to the photo I took of the arrangement.
Really suggest you measure your “before” and “after” BB height and head angle….. you might get a surprisePosted 5 years ago
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