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location Hamburg, Germany
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visits member for 2 years, 6 months
seen 11 hours ago

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.


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.
Jul
15
comment Sprinter Universal Bike
It would help if you could post a pic, especially close ups of any decals.
Jul
11
comment “Quick Fix” Tyre Repair Spray Cans
The need to pump up tyres once a month isn't an indication of losing air through a puncture at all. Air permeates through the rubber, regardless of its thickness. On road bikes with latex inner tubes it's even worse -- some people have to pump before every ride.
Jul
11
comment Armadillo's or Kevlar Inserts?
The Tyre pressure is probably even more important than the puncture proof layers, especially in road bike or similar narrow tyres.
Jul
11
comment How many years an aluminium frame lasts in a touring bike?
+1 for titanium! If it weren't so expensive and hence unsuited for commuting (because of the need to leave it out in public)...
Jun
29
awarded  Enlightened
Jun
28
awarded  Nice Answer
Jun
27
answered Is it worth buying used bikes of old models?
Jun
26
comment Adjusting gear ratio
Better get a dedicated singlespeed/fixed gear hub with 1/8" drivetrain. They last much longer in my experience. You can also get eccentric hubs to allow for chain tensioning. If you don't want a chain tensioner, you won't get good chain tension for all sprockets. One link less will probably be too much to go from 18 to 16. Also, your chain tension will reduce with chain wear. This could lead to unnecessary chain drops if you go through potholes or over curbs.
Jun
26
answered Adjusting gear ratio
Jun
26
answered What are the most important accessories for a new biker to get?
Jun
26
comment What are the most important accessories for a new biker to get?
The necessity of helmets is strongly disputed... ;)
Jun
20
comment Why does my bike crank creak and come loose?
The fact that the derailleur fell of too indicates sloppy workmanship on the seller's part. So I'd also take it back a couple of times as suggested here and ask them to use a torque wrench. If they don't own one, run away from them and look for a proper LBS in your vicinity.
Jun
18
comment Professional Rider Database
Depending on what you want to do, you could simply write an email to the sports-reference.com people and ask nicely.
Jun
13
comment Adjust brake tension / stopping power
I suggest using a wire brush on the pads. Doesn't leave sand in the pads as @Batman suggests and should be strong enough for the rubber.
Jun
12
comment How does a neck brace work?
+1 for the quote
Jun
12
answered How does a neck brace work?
Jun
12
comment Can I swap my 49cm fixie frame with a 47cm, with every other part fitting right on the new frame?
@alex: There also may be a difference in head tube diameter and bearing style if the OP only buys a frame without fork.