12,740 reputation
34897
bio website eric.eisenhart.name
location Santa Rosa, CA
age
visits member for 4 years, 4 months
seen 2 days ago

When I'm not bicycling, I'm a Linux SysAdmin. I'm on the board of my local bicycle advocacy group.

Bikes are my primary transportation. A 2009 Surly Long Haul Trucker, set up as a commuter and a 2012 Trek Ion CX. I also take the bus, but do not own a car.

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Dec
8
comment Torn. Want to support LBS but they don't carry what I really want
I've found that often if I order something through the LBS, they'll do pretty well at matching the real online price, since they won't charge me for shipping. (it's just one more thing in a big order from one of their suppliers).
Dec
5
comment Is there any rule of thumb for comparing lights rated in lux and lumens?
Lux is relative to distance. That graph is based on lux at 2 meters from the light. What distance is the light in the question getting 35 lux at?
Dec
1
comment Is there any rule of thumb for comparing lights rated in lux and lumens?
For everybody else that isn't familiar with the units: lux is how brightly lit a surface is, candela is (usually) the brightness of the center of the beam, and lumens is the total light output. Candela can be converted to lux (and vice-versa) given a distance. Lumens can be converted to candela (and vice-versa) given degrees (how much of the sphere the light comes out), but most bike lights spread light unevenly.
Nov
16
comment Why are brake lights not common?
FYI, the magnic light has a bit of a "brake light" functionality, since it draws power from the rim moving past, it mounts on the brake, and it is pulled closer to the rim when you brake; so it flares brighter as you're braking. (but turns off once you're stopped)
Nov
5
comment Is there a cheap touring bike that is as light as a road bike
What do you want to mount on this bike? Racks? Fenders?
Oct
20
comment How do I stop punctures for good?
The unfortunate reality is that there is no good way to stop all punctures for good. Even the very toughest tire/belt/tube combo is going to go flat if you hit a self-tapping metal screw, sharp nail, or most other strong sharp things longer than the protective layers of your tire.
Oct
20
comment How do I stop punctures for good?
A foam tube or other airless tire or tube will be flat-proof. It will also have a high risk of allowing the tire to pull off the rim when cornering, give a harsh ride (just one small spot absorbing bumps instead of the whole tire), have increased risk of rim damage, have worse traction, higher rolling resistance, higher weight, be amazingly difficult to install, and may actually be illegal where you live. They're an outdated technology, obsoleted over 100 years ago. More here: livestrong.com/article/222689-airless-bicycle-tires-review
Sep
18
comment What is the hazard turn signal?
I often see the 45-degree point used to signal a merge...
Sep
18
comment What is the hazard turn signal?
Yes, this matches my experience. Normal stop signal for "might need to suddenly stop", point with wiggly fingers for scattered hazard (glass, gravel), or just point for a more concentrated hazard (a branch, crack, etc).
Sep
15
comment Bike too big for me
Try bending at your pelvis so that you can arch your back less.
Sep
3
comment Why don't road bikes have disc brakes?
It's probably time to update this answer. There's been an increase in less race-focused high-end road bikes ("endurance") and road-ish bikes (cyclocross, "gravel grinder", etc) with some of those getting disc brakes.
Jun
23
comment Rear wheel at edge of dropouts on a Surly Cross Check
Note from Surly's site about the current Cross Check rear dropouts: "Semi-horizontal dropouts give you singlespeed compatibility and wheelbase adjustability. Adjuster screws are included to keep your wheel in the right place for optimal shifting if you go with derailleurs."
Jun
23
comment Rear wheel at edge of dropouts on a Surly Cross Check
Welcome to Bicycles Stack Exchange! Could you please include pictures of the dropouts?
Jun
4
comment Long commute (~30km/18.5mi) considerations/logistics
Welcome to Bicycles Stack Exchange! I have to agree with @Mσᶎ, this is too many questions all in one. A few of your questions already have decent answers on the site. Could you please split each question in here off into its own question on the site?
Jun
1
comment Help identify this frame
More pictures would help. A clear close-up of the different parts of the drive-train (front and rear gears, front and rear derailers), of the brakes, of the brake levers, of the shifters, and of the stem. If there's any kind of markings visible on them, also the front of the head tube and the hubs of the wheels.
May
21
comment How has biking changed in the past 15 years?
Also: (road): ramps and pins on cogs to improve shifting performance and increase the maximum jump, leading to the compact double (making a double instead of triple a reasonable non-racer option). An increase up to 11 gears in a cassette. Tapered steerer tubes (headset wider on bottom than top)
May
19
comment Rim Stickers/Decals
Welcome to Bicycles Stack Exchange! Could you please add a close-up picture of the brakes and of the rim sticker skid marks? It's difficult to see any detail in this picture.
May
15
comment Properties with Belt-driven Chains?
Very minor point: sometimes it's the dropout that's split. Either way, I think they avoid reducing rigidity by, basically, adding more material in that area.
May
11
comment Are both sides of a Avid rotor the same?
I've never heard of disc brakes on the right side. At first I thought you must have the fork on backwards, but I was able to confirm in their specs and photographic evidence that some roadrats have a right-side front disc brake. More information about their reasoning here: cotic.co.uk/geek/#ROADHOG_discmount
May
11
comment Are both sides of a Avid rotor the same?
According to their specifications and this pic of a roadrat from cotic's flickr, there are right-side mounted discs on some roadrats.