Originally Posted by
Giant Squid
I hope this isn't reviving a too long dead thread but I ordered a 40t chain ring from Boulder with no problems, but i have also realized as mentioned above that I need to get some new hardware as well which is proving just as difficult to find. Boulder has a set of hardware for a double but it seems pricey.
I have done some ebay searching and found hardware that says its for a Pro vis 5 but they all seem to come with 5 bolds instead of the 6 I seem to need. And I keep seeing ref. 25, what does that refer to?
Thankfully I didn't fall nor was I going very fast when it happened. I had only just started pedaling and suddenly the chain ring gave out. I guess what had happened is over the course of who knows how many months all the hardware for the chain rings worked itself lose and started falling out one by one and I didn't even know it until the chain ring snapped in half. Then I saw that all the bolts were gone.
Look at the photo on pastorbob's post further up in this thread. You'll see two groups of hardware in that photo. The group of six bolts on the left in that photo include spacers and these are the ones that hold the chainrings together. The group of five on the right that do not have spacers are the ones that hold the large TA chainring to the crankarm. I'm not near my TA stuff right now so cannot tell you if the length of the bolts is different from one group to the next but it looks like they are not different.
If your large (outer) TA ring is securely bolted to the right crankarm but your smaller (inner) ring is not securely bolted to the outer ring, the set of six bolts, nuts and spacers on the left is what you need. That is if you have a double. If you have a triple you'll need a set with six more spacers and probably longer bolts or nuts with longer sleeves that will hold three rings together with enough spacers separating them.