cbb
custombikesbuilding.com
Hi all,
when had been doing one of the 1996 Rock Shox Judy fork restoration I`ve realized a serious fact - missing coil springs on the after-market. It`s really strange that it`s almost impossible - today - to find any of them (right, if you`re lucky enough you may find - from time to time - rare Kronos or White Bros springs, but not too many). Does it seem that the coil springs after-market is currently empty? Well, it might be true. This observation led me to think about custom springs for Judy forks.
During last months I did some measurements and calculations, as well as I got in touch with a local company that regularly produces various coil springs for many engineering deployments. I showed them my blue-print of the springs for Judy forks and they produced a few - experimental - pairs of them in custom production. I decided to use stainless steel wire (that allowed us to keep the wire unprotected by any painting, just for this reason of experiment). To be as close to former after-market products as possible, we`ve made the same number of spring threads and length. I didn`t have precise measurements for spring rates of different weight riders (like "soft", "medium" and "firm"), therefore I firstly decided to make a set of springs for my current rider weight, which is around 73 - 75kg in high season (so I can say "medium" ride firmness). Once a set of custom springs were done, I prepared a blue-print for spring end-caps used to properly match the springs on top of the shafts in the fork. I made it easy from aluminium and it fits perfectly the inner and outer diameter of the springs. Again, due to same reason as above, I kept the end-caps without any painting or anodization, however, when needed, I can make any standard colour anodization.
Well, currently I have 3 pairs of my custom springs for Rock Shox Judy forks. The springs fit perfectly model years of 1995 and 1996 (I would say of 1997 too). I installed one pair of them in my spare 1996 Rock Shox Judy XC fork. Because the wire used to make the springs is a bit thicker, I cut some outer material off from the springs to get them easily into plastic adjuster top-caps. I installed springs together with a 63mm damping cartridge. All works well, but I have to note that additional 2mm plastic shim (e.g. jax connector for elastomers) is required, because the springs are 2mm shorter
I attached some pictures of the springs (see below).
Let me know, if you`re interested in these springs. I may provide you with one (1) or two (2) pairs of them for testing purposes. Please, note that these COIL SPRINGS ARE EXPERIMENTAL AND PRE-PRODUCTIONAL. They need more riders testing and proofing the quality with a feedback. Please, do your research on compatibility with your fork before you contact me.
Now information about pricing for these springs:
a pair of springs - 20EUR
a pair of aluminium end-caps - 10EUR
one pair per rider, please
+ shipping costs (to be discussed)
The only thing I request is to get back rider`s feedback on the quality and overal feeling when riding the springs. This will help me to improve the springs and their quality.
Thank you for reading my blog post and interest to buy&test the springs. PM for details and/or buy&test.
Peter
when had been doing one of the 1996 Rock Shox Judy fork restoration I`ve realized a serious fact - missing coil springs on the after-market. It`s really strange that it`s almost impossible - today - to find any of them (right, if you`re lucky enough you may find - from time to time - rare Kronos or White Bros springs, but not too many). Does it seem that the coil springs after-market is currently empty? Well, it might be true. This observation led me to think about custom springs for Judy forks.
During last months I did some measurements and calculations, as well as I got in touch with a local company that regularly produces various coil springs for many engineering deployments. I showed them my blue-print of the springs for Judy forks and they produced a few - experimental - pairs of them in custom production. I decided to use stainless steel wire (that allowed us to keep the wire unprotected by any painting, just for this reason of experiment). To be as close to former after-market products as possible, we`ve made the same number of spring threads and length. I didn`t have precise measurements for spring rates of different weight riders (like "soft", "medium" and "firm"), therefore I firstly decided to make a set of springs for my current rider weight, which is around 73 - 75kg in high season (so I can say "medium" ride firmness). Once a set of custom springs were done, I prepared a blue-print for spring end-caps used to properly match the springs on top of the shafts in the fork. I made it easy from aluminium and it fits perfectly the inner and outer diameter of the springs. Again, due to same reason as above, I kept the end-caps without any painting or anodization, however, when needed, I can make any standard colour anodization.
Well, currently I have 3 pairs of my custom springs for Rock Shox Judy forks. The springs fit perfectly model years of 1995 and 1996 (I would say of 1997 too). I installed one pair of them in my spare 1996 Rock Shox Judy XC fork. Because the wire used to make the springs is a bit thicker, I cut some outer material off from the springs to get them easily into plastic adjuster top-caps. I installed springs together with a 63mm damping cartridge. All works well, but I have to note that additional 2mm plastic shim (e.g. jax connector for elastomers) is required, because the springs are 2mm shorter
I attached some pictures of the springs (see below).
Let me know, if you`re interested in these springs. I may provide you with one (1) or two (2) pairs of them for testing purposes. Please, note that these COIL SPRINGS ARE EXPERIMENTAL AND PRE-PRODUCTIONAL. They need more riders testing and proofing the quality with a feedback. Please, do your research on compatibility with your fork before you contact me.
Now information about pricing for these springs:
a pair of springs - 20EUR
a pair of aluminium end-caps - 10EUR
one pair per rider, please
+ shipping costs (to be discussed)
The only thing I request is to get back rider`s feedback on the quality and overal feeling when riding the springs. This will help me to improve the springs and their quality.
Thank you for reading my blog post and interest to buy&test the springs. PM for details and/or buy&test.
Peter
Anhänge
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