Mugenski wrote: ↑
Mar 28, 2018 9:20 am
Is there a better spider/freewheel setup to use? I've noticed a concerning weeble-wobble in mine and I find the clearance of the inner chainring to be very tight with the spider itself. Wouldn't mind swapping it out for something a little higher quality and better clearances. Might be why I've thrown my chain a few times over the last 400km.
I have the previous gen setup and I have desigend a new spider in CAD. I was thinking of having it fabbed.
It allows the use of standard chainrings instead of the unorthodox 5 bolt setup from sickbikeparts. This way one can use a wide variety of tooth numbers, materials and makes it easier for maintenance in my opinion. It retains the 5 bolt fixture for the freewheel but uses standard chainring bolts for mounting the drive and driven chain rings.
The things that will still need to be fiddled with a little bit for each individual application would be the spacing possible for the driven chain ring from the face of the spider. This may also change with chainring to chainring depending on how thick the chainring is at the mount locations compared to the teeth thickness, but I don't think that varies much from manuf to manuf. Also chain ring bolts may need to be shaved down a bit since the lengths might be off compared to stock bicycle components. So, like with any custom project, a little bit of tinkering.
What I still need to do is buy a chainring so that I can confirm the standoff distance from the face of the spider to the driven(inner) chainring. Then I think it should be ready to fab.
I have attached the screen capture of the cad.
If anyone is interested in these please let me know, as it would save on per unit cost when getting it machined.
Dave, if I'm hijacking your thread and you want me to take this out of your thread please let me know.