Friday, January 30, 2009

Friday was repair day...

Yep, everyone had a crisis today.


As promised, I started off the day grafting in a new section of steerer tube for Marc B. This type of fabrication work is controversial at best, as everyone has an opinion as to the strength and durability of such repairs. Personally, the majority of the time, I feel that it is better to just build a new fork than to mess with such repairs, but each case is different.

So, below is a little vid tutorial showing the most bombproof repair procedure that I've used...for you builder types faced with such requests, check it out and decide for yourself your own level of expertise and comfort with such repairs.


Mikey had called a few months back and advised that he was having an issue with his seat would not move. When I asked him when the last time he had it out to lube it was, the answer was not promising...never.

So, he pre-treated the post with some penetrating oil for the last month or so, before coming in today to see how successful we would be in getting it out.

First up, we clamped the frame upside down by the post using a set of Vee blocks and a long breaker bar bolted through the Thomson seat rail supports...the result, we split the post vertically with our torsional efforts. Hmmm, this is gonna be tougher than I thought.

Next, I cut off the remaining shards of post, and got to work...
I began by carefully sawing the post into four segments, hoping to create some relief to remove the pieces.
Cutting all done, let's try to peel away some pieces parts ;)
After much work, I was able to free the remaining post. The aluminum had chemically bonded to the interior of the steel seat tube, leaving only a galvanic dust behind. Here's Mike, relieved to be finished with the process...
The seat tube escaped unscathed, minus a little paint from the operation. A quick pass with the reamer and admonishment to grease his post when he lubes his chain ended the day.
The aftermath...
Lesson's fun to ride your bike, but it needs some attention too every now and then.
Mike S. stopped by with a broken control lever in his hand...a necessary component for his snow plow to battle the 4' drifts covering his driveway. A quick trip through the blaster, 5 min on the weld table, and some fast drying paint and he was on his way back into the cold.

So, busy day, but was nice to resolve some simple problems before I jump into the show fray.


Craig Ryan said...

Gee, wish you were my neighbor!

rmb said...

Holy seatpost hell; must have been a pain to saw enough to break without damaging the seat tube.

rmb said...

Oh, my other comments were under "r" because I messed up the name somehow.

Rody said...

Craig...If you lived somewhere other than Indiana I might take you up on about a Hawaiin frame co-op? was definately "easy does it" :)


Anonymous said...


Nice work with that fork.


Anonymous said...

Geez you're a nice guy Rody. Check that Fred's BB too, I bet that's seized as well.

bentley said...

Did you use a hacksaw blade to cut the into the part of the post inside the seat tube?
Nice work btw....

Rody said...


I intentionally left that pic out as it's not something I'd encourage others to do.

I actually used a sawzall with a fine tooth metal must be VERY careful using power tools around thin bicycle tubing (a little experience helps too).

Larry, thanks for the props :)