Originally Posted by
pastorbobnlnh
A few observations:
First, the Park Video: it seems unimaginable that the Park mechanic refers to the sprockets as cogs. That's not an unusual mistake and lots of people do it, but you'd think that a Park expert would name them correctly.
Second, like Jon, I have broken many a chainwhip on stubborn (mostly Suntour) threaded sprockets. I've also broken more teeth off Suntour sprockets then any other brand.
Third, Jon and his cheater bar and pipe wrench: Fantastic work! I've not attempted this approach, and will give it a try the next time I'm in the workshop. I have plenty of !@#$% stuck broken tooth threaded sprockets preventing removal of other perfectly usable ones.
Fourth, consider looking for a Bicycle Research or similar freewheel vise. They are far superior to the Suntour four prong model pictured above. They use a protrusion which fits into the threaded area of freewheel and then have chains which can engage the largest sprocket. Mine even has a threaded hole through the center of the protrusion and I was able to find the correct bolt at my local ACE and using washers and a wingnut, I can secure the freewheel even further.
Thanks for the photo, Bob. I don't think I'd ever seen one of those tools. But it looks to me like the chain would be vulnerable to breaking at the pins if too much force is use, which is of course the way chain whips also fail. Maybe Bicycle Research used some kind of super-heavy-duty chain that's tougher than the stuff used on chain whips?
Of course, I don't know how the Suntour vise will stand up to the pipe-wrench-and-cheater-bar method over the long haul. I plan to employ it sparingly and hope for the best. In the meantime, I can only say that it didn't break on the first attempt.
By the way, I was kind of jolted by your use of the phrase "!@#$%." You haven't become a Unitarian, have you?