Friday, April 30, 2010

cylinder hone extension

there is a model of bike that we sell at the has a bunch of burrs pretty far down inside the seat tube, so far that a standard hone does not reach. these burrs make installing and adjusting seat posts pretty unpleasant, plus the post gets really torn up.

so i made this extension for the hone to reach a smidge more than 12" into the seat tube.

it has an m6 grub for a set screw. i like to say grub. grub grub grub

the opposite end of the grub screw is stepped down to 3/8" to fit into the chuck of smaller drills.

Thursday, April 29, 2010

Shifter OH

IMG_4998, originally uploaded by rackntroll.

this is the first campagnolo shifter OH of the spring/summer cycling season. we get a lot of them in the shop i work at. they are pretty easy to do, the difficult part is having the necessary rebuild parts in stock.

Tuesday, April 27, 2010

time to try again

IMG_4995, originally uploaded by rackntroll.

2nd try building a fork for my othewise completed MTB frame. this time its a unicrown fork.

Thursday, April 15, 2010

a liberated back

i forgot how nice it is to be able to use the carradice, but especially to have an unladen back! just chuck my stuff in the "boot", hop on, and go. this bike handles almost as if there is no load at all, very nice!
hopefully soon ill see how she handles with a front load.

Tuesday, April 13, 2010

this is boring

HA! thats a machinists' joke.

hey- im not really a machinist, i just play one on the internet.

on with the pictures!

this is a tiny little boring bit i ground for small holes to be bored to a shoulder no deeper than a quarter inch or so.

going in for the kill.

these little widgets came out very nice. a nice fit for an M5 bolt.

it found its way onto a 5/16 x .035" 4130 tube.

which in turn became a canti-mount carradice support for the XO-2.

Friday, April 9, 2010


IMG_4888, originally uploaded by rackntroll.

Shimano XT M730 and M732 hubs, 32 hole, with a 7 spd freehub body.
laced to 700C Velocity Synergy up front and Velocity Synergy Off-Center on the rear.
gives a single spoke length of 295 all around, and a nearly dishless rear wheel.

these will be a nice match to the 7spd bar-end shifters i picked up at least years trexlertown swap meet.

Wednesday, April 7, 2010

down from the rafters

IMG_4887, originally uploaded by rackntroll.

i used to ride this bike a ton when i lived in philadelphia. since i moved out of the city this bike was never in full rotation. about a year ago i swapped out the original moustache bars for the flat bar (thats why the cables are so long), but didnt really start riding it except for a trip or 2 to work. ill give her another shot.

Tuesday, April 6, 2010

trust your gut

IMG_4886, originally uploaded by rackntroll.

after assembling the frame and fork, and riding around my driveway, something didnt feel right. the fork felt much too soft.
so i clamped it in the bench vise by the steerer, gave the legs a big heave ho with a cheater bar, and not surprisingly some small cracks appeared. a couple more hard tugs and she split all the way.
i knew something didnt seem right when i was brazing in the steerer.

oh well, lesson learned.

i think ill go split some wood now.

shim shimminy

IMG_4882, originally uploaded by rackntroll.

i bought these paul components thumbies a few years ago, but the build they were intended for never happened.
now id like to use them on my new frame im finishing up. they're made for a 26.0mm handle diameter, a mtn bar is 22.2mm. a little shim action and viola, now they work for either!
not sure why paul doesnt just make one size and use a shim, makes more sense [to me] than having 2 different clamp sizes, and more versatile to boot.