I have been doing a lot of cantilever post repair lately. Particularly on polo bikes. I have also been putting cantilever mounts on bikes intended for caliper brakes. Here are a few pictures of the process. I sometimes TIG weld them on and sometimes I brass braze them. If I'm mounting new bosses I stick to brass because it looks nicer and they can be heated and removed which is easier than with TIG because they have to be cut off with a hack saw. If the original boss is welded then I go ahead and TIG the replacement in place. I use a modified rack stay to keep the posts aligned.
Wednesday, January 30, 2013
Bob win the most recent Tall-o-ween bicycle race. His prize was a custom Old Field Cycles frame. Bob went ahead and decided on a gig welded polo frame and added a fork to the deal. Here are done shots taken on my phone of his split plate crown fork and the the mitering of the front triangle underway. I used thick straight Gage tubing for his head tube so I turned down the center section a bit on the lathe. The fork is a split plate design which I have built a number of and its one of my favorite designs.
Thursday, November 29, 2012
i have also been toying around with a new idea for a decaleur(a traditional french method of attaching a front bag to a rack)
typically decaleurs hold the front bag very securely and make it easy to remove the front bag, but every once in a while, you hit a bump just right and your load is distributed just so and the bag jumps off of the mount. one way to prevent this is to also have a strap which holds the bag to the rack, this is not the most elegant setup and requires more work to remove your bag.
my new design utilizes two spring loaded rods attached to the mount on the bag and by pulling both pins outward the bag comes off quickly and easily.
check out the photos.