856 swingarm weak spot??

[orange]

Is he right about that? If so does it apply to my 855 polished swingarm and my black XP-8 swingarm?

http://cgi.ebay.co.uk/OFFROAD-PROFLEX-856-NEW-ODS-ELASTOMERS-girvin-k2_W0QQitemZ170049727814QQihZ007QQcategoryZ22679QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[micah]

funny you should mention... I was just reading this post on MTBR...

http://forums.mtbr.com/showthread.php?t=244271

[orange]

ooh. First I've heard of this. I wonder if that's why they went to the longer carbon swingarm for the x57's...

[Colin]

Extra welding on late 856's and XP series bikes, see my previous postings

Col.

[orange]

In a related query - why is there an extra little patch of welding on the drive side of the swingarm on top near the cable insert - doesn't seem immediately obvious to me why that's there. It's long and thin (say 40mm by 10mm) and polished smooth.

[shovelon]

I have seen that same type of crack at the dropout on San Andreas frames. A little weld takes care of the problem. Both sides are vulnerable, but easily repairable and reinforcable.

[shovelon]

In a related query - why is there an extra little patch of welding on the drive side of the swingarm on top near the cable insert - doesn't seem immediately obvious to me why that's there. It's long and thin (say 40mm by 10mm) and polished smooth.

I checked my 856 swingarm, and it also has that welded patch. I assume that the drive side may flex under power, and the hole for the derailleur cable just makes it a weak spot.