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location Hamburg, Germany
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visits member for 2 years, 7 months
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Professional software developer for multithreaded, low-latency, time critical code. Formerly engaged in embedded software for medical engineering.

I'm a bicycle nut who owns five bicycles, from an Enduro MTB to my relatively new Velomobiel Quest. Yes, some of my bikes are more expensive than my car was. I do all maintenance myself and have even built three of the bikes from parts.

If there's time, I do some electronics, mainly high-power LED and microcontroller stuff.


1d
comment Cleaning Carbon Black off a Bicycle
The smoother the surface, the easier it should be to clean. Very rough powder coats can be a major pita in this respect.
2d
comment Cleaning Carbon Black off a Bicycle
Is your frame powder-coated or painted, i.e. is the surface smooth?
Aug
19
awarded  Civic Duty
Aug
19
comment Use a lock nut on a presta valve?
@Johnny I have Presta valves on my MTB, and there I had the problem. On a road bike, you're quite correct; the much higher pressure will keep everything together nicely.
Aug
18
comment Use a lock nut on a presta valve?
@Vorac However, if you use the nut, you'll need to have the tubes powdered with talcum or some such to further prevent them from moving. Otherwise, the tubes may stick to the tires and move during a hard stop, ripping the valve out in the process. Very annoying, especially if you don't carry a spare.
Aug
13
comment Old Kalkoff cross bike, worth restoring or not?
Like I said, no offence intended.
Aug
13
comment 90 mile round trip work commute
A note on velomobiles: having to start at e.g. traffic lights is quite painful due to weight and riding position. So if the commute has lots of stopping points, e.g. goes through several major cities, think twice before putting down the sum for a small car.
Aug
13
comment Old Kalkoff cross bike, worth restoring or not?
Also, no offence intended, the bike seems to be in use. Is this actually your bike or are you trying to assess if it would be worth it to buy and or "acquire otherwise"?
Aug
13
comment Old Kalkoff cross bike, worth restoring or not?
This bike looks as if it was working, otherwise, why would it be chained up in front of an office building or university? So most likely, some spares as others have suggested and you're good to go.
Aug
6
comment Traveling road bikes that disassemble
I'm not sure whether this is a good fit for the Q&A format. It's basically a shopping question and I think the answer would be readily available on google.
Jul
30
answered Do I need to patch my tubed-tire if I have a puncture?
Jul
29
revised Why is it important to keep bearing sets when greasing a campagnolo hub?
Removed signature as per http://bicycles.stackexchange.com/help/behavior
Jul
29
suggested suggested edit on Why is it important to keep bearing sets when greasing a campagnolo hub?
Jul
28
comment What is the maximum safe storage temperature for a bike?
What about leaving a used 50$ beater at your regular office, e.g. in a storage shed, the corner of a production hall, the bottom of a staircase or wherever?
Jul
24
comment difficulty inflating my bike tire
@Batman caps on presta valves are against rule #60... although I also keep them on my bikes.
Jul
23
comment 2,600km on an 8 speed bike?
What Daniel said, especially if you want to ride passes. In the flat, 200km a day over two weeks is doable if you're well-trained. On the passes? No.
Jul
23
comment 2,600km on an 8 speed bike?
@Papuass: You could actually count this as a benefit -- no need to clean the chain, fiddle with derailleur adjustments, bent hangers and broken parts on the roadside. Many, many touring bikes come with internally geared hubs like the alfine or even the Rohloff for just this reason.
Jul
18
comment Creaking sounds from the saddle tube?
Let's see if it helps first.
Jul
18
comment Creaking sounds from the saddle tube?
Every saddle post should have this mark. It's about a third from the bottom iirc. Maybe it was printed on an the print is now gone, but it should have had such a mark.
Jul
18
comment Creaking sounds from the saddle tube?
Did you respect the max marking on the saddle post? If that shows outside the seat tube, this could damage both the frame and the post. Otherwise, remove the post, grease lightly, reinstall. This could help, too.