Progressive spring length

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richwrench

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Just bought a set of used Progressive springs on E-bay. Cleaned 'em up nice & shiney & popped my old springs out. That's when I noticed the difference in size - the "new" progressives are the same diameter as the factory springs , but are only 15 inches long, whereas the factory springs are much wimpier looking, but they're 18 inches long. I put them in & went for a short ride - MUCH better ! No more bottoming out going around bumpy corners , but here's my concern - there's now almost a 3 inch gap between the top of the spacer & the screw on cap on the top of the fork. Does a Progressive spring require a longer spacer ? I didn't measure the spacer when it was out - I'm guessing about 8 or 10 inches. I can't imagine it should be that way, but it does ride much better. What say the experts ?:ummm:
 
Yes your new spacer length will be based on what is need for proper sag height. The spacer in there now is too short.
 
Just bought a set of used Progressive springs on E-bay. Cleaned 'em up nice & shiney & popped my old springs out. That's when I noticed the difference in size - the "new" progressives are the same diameter as the factory springs , but are only 15 inches long, whereas the factory springs are much wimpier looking, but they're 18 inches long. I put them in & went for a short ride - MUCH better ! No more bottoming out going around bumpy corners , but here's my concern - there's now almost a 3 inch gap between the top of the spacer & the screw on cap on the top of the fork. Does a Progressive spring require a longer spacer ? I didn't measure the spacer when it was out - I'm guessing about 8 or 10 inches. I can't imagine it should be that way, but it does ride much better. What say the experts ?:ummm:

Progressive springs will do wonders for rideability and handling. You can make new spacers out of thick walled (sch 40) pvc.
 
Yeah, I saw that. Was just surprised I guess. I never imagined plastic could hold up to the wear & tear & oil - but come to think of it all the compressed air lines in my shop are PVC & plenty old & have held 175psi for many years, so I guess fork spacers are not a challenge at all.
 
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