SF Cyclotouring

Ride reports and other ramblings from a San Francisco cyclist.

3/10/2014

Introducing The Potis Strap

This is a brilliant idea that I wish I'd thought of, but didn't.  It came from the mind of Mr. Potis.

1. Bungie-cord loop through strap-loops on the bottom of your rando bag. (I just tied off the bungie cord with a simple square knot.)
Potis strap

2. The bungie-cord loop fits through the front loop of your front rack, and over the backstop.
Potis strap

3. Then you fit the bag on the rack as usual.  The bungie cord keeps the front of the bag nice and snug to your rack!
Potis strap

Easy on-and-off.  Brilliant!

11/24/2013

Nitto Rack Wings

Nitto Rack Wings by jimgskoop
Nitto Rack Wings, a photo by jimgskoop on Flickr.

Made a friend's Nitto M-12 rack wider to eliminate Berthoud bag sag.

11/14/2013

Nice Rack

11/04/2013

Hoke Torch Tips Sizes

Nowhere on the 'net is there information about the actual sizes of tips for the Hoke Jeweler's Torch!  So I've measured and posted them here.
  • Propane Tip #1A - Drill bit size #60 - 0.040 inches
  • Propane Tip #2A - Drill bit size #57 - 0.043 inches
  • Propane Tip #3A - Drill bit size #54 - 0.054 inches
  • Propane Tip #5A - Drill bit size #49 - 0.073 inches
Here are some Victor tip sizes for comparison:
  • Victor #00 - Drill size #70 - 0.028 inches
  • Victor #0 - Drill size #65 - 0.035 inches
  • Victor #1 - Drill size #60 - 0.040 inches
  • Victor #2 - Drill size #56 - 0.046 inches
  • Victor #3 - Drill size #53 - 0.060 inches
  • Victor #4 - Drill size #49 - 0.073 inches

9/25/2013

Brazin'

HokeOxyCon!Torch StuffSetting upFirst lightPortable
First Braze AttemptBrazin'

Oxy/Propane Brazing Torch, a set on Flickr.

Finally, after quite literally wanting one for ~20 years, I have a proper brazing torch rig! Now I have to learn how to use it, since this works very VERY differently than my simple MAPP/air torch.

9/15/2013

Box Dog Bikes Pelican Randonneur -- Finally on the Road!

Pelican HeadsetEric & GabeMine!Yes.P-dazzledIMG_0974.JPG
IMG_0975.JPGPelican.This stuff causes headachesCuttingIs it square?2nd bend
Yeah, that's not rightBending againThat's much betterTrimmed offPieces PartsLe Pelican du BDB
Bag and ForkFishing, yes.Out the other sideFishing TackleWire.  Internal.  Infernal.Wire.  Exit.  BB.
2013 BDB Pelican, a set on Flickr.
It's been a long time coming, but I finally finished building my Winter-Bicycles-built 2013 Box Dog Bikes Pelican frameset, and took it out for a first ride yesterday. We did ~70 miles on the SFR Lucas Valley Populaire, and the bike performed quite well.

Any ride on a brand new bike is bound to have a high probability of problems or require adjustments, but I'm happy to report that -- aside from a very minor seat-height adjustment that I made at the end of the ride -- there were none.  The custom rack, decaleur, and headlight performed flawlessly.  I do need to think about getting those powdercoated sooner than later since some of the spray-paint is already wearing off at some contact points, but this is minor and expected.  There is some very minor fender rub at the bottom of the front fender while going over bumps that I need to sort out.  Odd for a low-trail bike is the fact that I get a small bit of shoe/front-fender-bolt interference.

I have a long history of problems with shimmy on rando bikes, so I was curious to see whether the Pelican would have this problem, too.  Even though I installed a roller-bearing headset (which has a higher-than-normal amount of friction and therefore is purported to help dampen out the oscillations), this bike does shimmy for me when riding no-handed at 15-18 mph.  It is milder and more controllable than on my other rando bikes -- if I just lean forward slightly I can make it stop, and I can ride the bike no-handed confidently.  Also, the bike feels solid and confident during high-speed descents -- there was no hint of speed wobbles coming down White's Hill at nearly 40 mph.

The big question for this bike was "Does it plane"?  Planing is the name given to an esoteric/mysterious synergy between the natural flex or spring of a bicycle frame and its rider's pedaling motion.  This phenomenon is not unlike bouncing on a trampoline at just the right amplitude and frequency so that you go higher with each jump.  An overly stiff bike frame may only plane for a heavy rider, and likewise a very light rider may only experience planing on a very flexible frame.  When this interaction is harmonious, the bike can feel like it has a slight turbo-boost, which is quite marvelous.

Of the many bikes I've owned, the one that planed the best was a 1993 Bridgestone RB-1.  That frame was made with Ishiwata quad-butted tubing, a close approximation of which can be made by simplifying it to 8/5/8 top tube and 9/6/9 down tube.  That's exactly what this Pelican frame is supposed to be made from, so I was eager to see if I'd experience the magic.  Did I?  The jury's still out, although I can say that the bike encouraged me to ride harder and faster during yesterday's ride than I should have, because I was cooked for the second half.  The frame overall definitely feels more lively than my 1992 Trek 400 650B conversion.  I need to ride the bike more.

Overall, I quite like it.

5/04/2013

S&P Randonneur Project