Forum menu
Hi guys I have a coil rear shock which on the manufacture's site says I need a 445lb spring. But I can make my sag correct with the already fitted 400lb spring but I have adjusted it more than the recommended 6 turns to compress it enough. Why is there this limit on how much you can compress a spring to set the sag? Will mine not perform correctly, I haven't ridden it yet, as it will be under too much force? Thanks
tried the spring calc on tftuned www?
[url= http://www.tftunedshox.com/info/spring_calculator.aspx ]http://www.tftunedshox.com/info/spring_calculator.aspx[/url]
There's two potential negatives to doing this:
1) there's potential for the individual turns of the coil to bind on full compression.
2) the spring rate has not changed - it is still a 400lb/in spring (this is one of the differences to air suspension, where you can't separate preload and spring rate). This means that you are likely to bottom out on relatively minor hits or be very dependent upon high speed compression damping. Whether or not this is a reality will depend upon how the leverage rate changes during the stroke.
By turning your spring collar 6 turns you are closing up the gaps between coils. When your shock fully compresses on a big hit, there may not be enough distance left between each coil to allow the shock to close without ("spring bind") each coil smashing into each other, at best, shearing off your spring collar, at worst, bending a shock shaft or other high cost damage 😯
Ah yes I see now,thanks guys looks like I need a new spring then . cheers